ASTM A519/A519M-23

Standard Specification for Seamless Carbon and Alloy Steel Mechanical Tubing

ABSTRACT
This specification covers for several grades of carbon and alloy steel mechanical tubing, either hot-finished or cold-finished. The steel used in the mechanical tubing may be cast in ingots or may be strand cast. When steel of different grades is sequentially strand cast, identification of the resultant transition material is required. The seamless tubing is a tubular product made without a welded seam. It is usually manufactured by hot working steel, and if necessary, by subsequently cold finishing the hot-worked tubular product to produce the desired shape, dimensions and properties. The tubes shall be furnished in the following shapes: round, square, rectangular and special sections. Heat analysis shall be made to determine the percentages of the elements specified. If secondary melting processes are used, the heat analysis shall be obtained from one remelted ingot or the product of one remelted ingot of each primary melt. The tubing shall be coated with a film of oil before shaping to retard rust when specified
SCOPE
1.1 This specification covers several grades of carbon and alloy steel seamless mechanical tubing. The grades are listed in Tables 1-3. When welding is used for joining the weldable mechanical tube grades, the welding procedure shall be suitable for the grade, the condition of the components, and the intended service.    
1.2 This specification covers both seamless hot-finished mechanical tubing and seamless cold-finished mechanical tubing in sizes up to and including 12 3/4 in. [325 mm] outside diameter for round tubes with wall thicknesses as required.  
1.3 The tubes shall be furnished in the following shapes, as specified by the purchaser: round, square, rectangular, and special sections.  
1.4 Supplementary requirements of an optional nature are provided and when desired shall be so stated in the order.  
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as the standard. Within the text, the SI units are shown in brackets or parentheses. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order. In this specification hard or rationalized conversions apply to diameter, lengths and tensile properties. Soft conversion applies to other SI measurements.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Aug-2023
• ICS: 23.040.10 - Iron and steel pipes
• ICS: 23.040.40 - Metal fittings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.09 - Carbon Steel Tubular Products

Relations

• Replaces: ASTM A519/A519M-17 - Standard Specification for Seamless Carbon and Alloy Steel Mechanical Tubing
• Effective Date: 01-Sep-2023
• Refers: ASTM A941-24 - Standard Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
• Effective Date: 01-Mar-2024
• Refers: ASTM A370-24 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Mar-2024
• Refers: ASTM A370-23 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 15-Sep-2023
• Refers: ASTM A941-23 - Standard Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
• Effective Date: 01-May-2023
• Referred By: ASTM A534-17(2022) - Standard Specification for Carburizing Steels for Anti-Friction Bearings
• Effective Date: 01-Sep-2023

Overview

ASTM A519/A519M-23 is the internationally recognized standard specification for seamless carbon and alloy steel mechanical tubing. Developed by ASTM International, this standard ensures consistent quality and performance for a wide range of mechanical applications. It covers requirements for several grades of seamless mechanical tubing, which may be produced by hot-finishing or cold-finishing processes. Tubing can be supplied in various shapes including round, square, rectangular, and special sections.

This standard applies to tubes with outside diameters up to and including 12 3/4 inches (325 mm) for round tubes, and is crucial for manufacturers, purchasers, and users who require reliable tubular products for structural and mechanical uses in numerous industries.

Key Topics

• Seamless Tubing Types

  • Hot-finished and cold-finished manufacturing processes
  • Carbon and alloy steel grades
  • Tubing supplied in round, square, rectangular, and custom shapes

• Material and Manufacturing

  • Steel may be produced by ingot or strand casting
  • If grades are sequentially cast, transition material must be identified and removed
  • Tubes are finished to meet specified mechanical properties and dimensional tolerances

• Chemical Composition and Analysis

  • Strict requirements for elemental composition, analyzed per specified tables for carbon, alloy, and resulfurized steels
  • Both heat and product analysis required under certain conditions for quality assurance

• Dimensional Tolerances

  • Detailed permissible variations in outside diameter, wall thickness, length, and straightness for different tube types
  • Special tolerances for square and rectangular tubing, including corner radii and squareness

• Surface Finish and Coating

  • Tubes are supplied with suitable surface finish per specified condition
  • With purchaser specification, tubes may be coated with oil to retard rust

• Ordering and Supplementary Requirements

  • Orders must specify quantity, material, dimensions, grade, condition, surface finish, end use, packaging, and any supplementary requirements

Applications

Seamless carbon and alloy steel mechanical tubing manufactured to ASTM A519/A519M-23 is essential for a wide range of demanding applications, including:

• Automotive and Transportation: Axles, drive shafts, bushings, and steering components require high-strength, precisely dimensioned tubing.
• Machinery and Manufacturing: Used for rollers, bearings, cylinders, and machine parts where uniformity and mechanical integrity are critical.
• Construction and Structural Engineering: Employed in framework, scaffolding, supports, and load-bearing elements.
• Oil, Gas, and Energy: Suited for certain downhole tools and equipment requiring high mechanical properties without weld seams.
• General Engineering: Custom and specialty machine components benefit from the wide range of available tube shapes and steel grades.

The standard's flexibility in dimensional tolerances and material grades allows it to serve custom requirements in both small and large production runs, making it highly relevant for OEMs and fabricators across industries.

Related Standards

For users of ASTM A519/A519M-23, familiarity with related standards enhances compliance and interoperability:

• ASTM A370: Mechanical Testing of Steel Products
• ASTM A751: Chemical Analysis of Steel Products
• ASTM A1040: Harmonized Standard Grade Compositions for Wrought Carbon, Low-Alloy, and Alloy Steels
• ASTM A941: Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
• ASTM A1058: Mechanical Testing of Steel Products-Metric
• MIL-STD-129/163: Marking and Preparation for Shipment and Storage
• Fed. Std. No. 123: Marking for Civil Agency Shipment

Utilizing ASTM A519/A519M-23 together with these related standards supports best practices in steel mechanical tubing specification, procurement, and application worldwide.

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: A519/A519M − 23
Standard Specification for
Seamless Carbon and Alloy Steel Mechanical Tubing
This standard is issued under the fixed designation A519/A519M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2. Referenced Documents
2.1 ASTM Standards:
1.1 This specification covers several grades of carbon and
A370 Test Methods and Definitions for Mechanical Testing
alloy steel seamless mechanical tubing. The grades are listed in
of Steel Products
Tables 1-3. When welding is used for joining the weldable
A751 Test Methods and Practices for Chemical Analysis of
mechanical tube grades, the welding procedure shall be suit-
Steel Products
able for the grade, the condition of the components, and the
A941 Terminology Relating to Steel, Stainless Steel, Related
intended service.
Alloys, and Ferroalloys
1.2 This specification covers both seamless hot-finished
A1040 Guide for Specifying Harmonized Standard Grade
mechanical tubing and seamless cold-finished mechanical Compositions for Wrought Carbon, Low-Alloy, and Alloy
tubing in sizes up to and including 12 ⁄4 in. [325 mm] outside Steels
A1058 Test Methods for Mechanical Testing of Steel
diameter for round tubes with wall thicknesses as required.
Products—Metric
1.3 The tubes shall be furnished in the following shapes, as
2.2 Military Standards:
specified by the purchaser: round, square, rectangular, and
MIL-STD-129 Marking for Shipment and Storage
special sections.
MIL-STD-163 Steel Mill Products Preparation for Shipment
and Storage
1.4 Supplementary requirements of an optional nature are
2.3 Federal Standard:
provided and when desired shall be so stated in the order.
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
1.5 The values stated in either SI units or inch-pound units
are to be regarded separately as the standard. Within the text,
3. Terminology
the SI units are shown in brackets or parentheses. The values
3.1 Definitions of Terms—For definitions of terms used in
stated in each system may not be exact equivalents; therefore,
this standard refer to:
each system shall be used independently of the other. Combin-
3.1.1 Terminology A941 for general steel terminology,
ing values from the two systems may result in non-
3.1.2 Test Methods and Definitions A370 or Test Methods
conformance with the standard. The inch-pound units shall
A1058 for mechanical testing of steel products terminology,
apply unless the “M” designation of this specification is
and
specified in the order. In this specification hard or rationalized
3.1.3 Test Methods and Practices A751 for chemical analy-
conversions apply to diameter, lengths and tensile properties.
sis of steel products terminology.
Soft conversion applies to other SI measurements.
4. Ordering Information
1.6 This international standard was developed in accor-
4.1 Orders for material under this specification should
dance with internationally recognized principles on standard-
include the following, as required, to describe the desired
ization established in the Decision on Principles for the
material adequately:
Development of International Standards, Guides and Recom-
4.1.1 Quantity (feet, weight, or number of pieces),
mendations issued by the World Trade Organization Technical
4.1.2 Name of material (seamless carbon or alloy steel
Barriers to Trade (TBT) Committee.
mechanical tubing),
1 2
This specification is under the jurisdiction of ASTM Committee A01 on Steel, For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
A01.09 on Carbon Steel Tubular Products. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Sept. 1, 2023. Published October 2023. Originally the ASTM website.
approved in 1964. Last previous edition approved in 2017 as A519/A519M – 17. Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700
DOI: 10.1520/A0519_A0519M-23. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A519/A519M − 23
TABLE 1 Chemical Requirements of Low-Carbon Steels
4.1.16 Special marking (Section 16), and
Chemical Composition Limits, % 4.1.17 Special packing (Section 17).
Grade
A B B B
Carbon Manganese Phosphorous, Sulfur,
Designation
max max
5. Materials and Manufacture
MT 1010 0.05–0.15 0.30–0.60 0.040 0.050
5.1 The steel may be made by any process.
MT 1015 0.10–0.20 0.30–0.60 0.040 0.050
MT X 1015 0.10–0.20 0.60–0.90 0.040 0.050 5.2 If a specific type of melting is required by the purchaser,
MT 1020 0.15–0.25 0.30–0.60 0.040 0.050
it shall be as stated on the purchase order.
MT X 1020 0.15–0.25 0.70–1.00 0.040 0.050
A 5.3 The primary melting may incorporate separate degas-
Limits apply to heat and product analyses.
B
Limits apply to heat analysis; except as required by 7.1, product analyses are sing or refining, and may be followed by secondary melting,
subject to the applicable additional tolerances given in Table 5.
such as electroslag or vacuum-arc remelting. If secondary
melting is employed, the heat shall be defined as all of the
ingots remelted from a single primary heat.
TABLE 2 Chemical Requirements of Other Carbon Steels
A 5.4 Steel may be cast in ingots or may be strand cast. When
Chemical Composition Limits, %
Grade
Phosphorous, Sulfur, steel of different grades is sequentially strand cast, identifica-
Designation Carbon Manganese
max max
tion of the resultant transition material is required. The
producer shall remove the transition material by an established
1008 0.10 max 0.30–0.50 0.040 0.050
1010 0.08–0.13 0.30–0.60 0.040 0.050 procedure that positively separates the grades.
1012 0.10–0.15 0.30–0.60 0.040 0.050
5.5 Tubes shall be made by a seamless process and shall be
1015 0.13–0.18 0.30–0.60 0.040 0.050
1016 0.13–0.18 0.60–0.90 0.040 0.050
either hot finished or cold finished, as specified.
1017 0.15–0.20 0.30–0.60 0.040 0.050
1018 0.15–0.20 0.60–0.90 0.040 0.050 5.6 Seamless tubing is a tubular product made without a
1019 0.15–0.20 0.70–1.00 0.040 0.050
welded seam. It is manufactured usually by hot working steel
1020 0.18–0.23 0.30–0.60 0.040 0.050
and, if necessary, by subsequently cold finishing the hot-
1021 0.18–0.23 0.60–0.90 0.040 0.050
1022 0.18–0.23 0.70–1.00 0.040 0.050 worked tubular product to produce the desired shape, dimen-
1025 0.22–0.28 0.30–0.60 0.040 0.050
sions and properties.
1026 0.22–0.28 0.60–0.90 0.040 0.050
1030 0.28–0.34 0.60–0.90 0.040 0.050
6. Chemical Composition
1035 0.32–0.38 0.60–0.90 0.040 0.050
1040 0.37–0.44 0.60–0.90 0.040 0.050
6.1 The steel shall conform to the requirements as to
1045 0.43–0.50 0.60–0.90 0.040 0.050
chemical composition prescribed in Table 1 (Low Carbon MT
1050 0.48–0.55 0.60–0.90 0.040 0.050
1518 0.15–0.21 1.10–1.40 0.040 0.050
Grades), Table 2 (Higher Carbon Steels), Table 3 (Alloy
1524 0.19–0.25 1.35–1.65 0.040 0.050
Standard Steels (see Guide A1040)) and Table 4 (Resulfurized
1541 0.36–0.44 1.35–1.65 0.040 0.050
or Rephosphorized, or Both, Carbon Steels (see Guide
A
The ranges and limits given in this table apply to heat analysis; except as
A1040)).
required by 7.1, product analyses are subject to the applicable additional toler-
ances given in Table 5.
6.2 Grade MT1015 or MTX1020 will be supplied at the
producer’s option, when no grade is specified.
6.3 When a carbon steel grade is ordered under this
4.1.3 Form (round, square, rectangular or special shapes,
specification, supplying an alloy grade that specifically re-
Section 1),
quires the addition of any element other than those listed for
4.1.4 Dimensions (round, outside diameters and wall
the ordered grade in Table 1 and Table 2 is not permitted.
thickness, Section 9; square and rectangular, outside dimen-
sions and wall thickness, Section 10; other, specify), 6.4 Analyses of steels other than those listed are available.
4.1.5 Length (specific or random, mill lengths, see 9.5 and To determine their availability, the purchaser should contact the
10.5), producer.
4.1.6 Manufacture (hot finished or cold finished, 5.5 and
7. Heat Analysis
5.6),
4.1.7 Grade (Section 6), 7.1 An analysis of each heat of steel shall be made by the
4.1.8 Condition (sizing method and thermal treatment, Sec- steel manufacturer to determine the percentages of the ele-
tion 13), ments specified; if secondary melting processes are used, the
4.1.9 Surface finish (special pickling, shot blasting, or heat analysis shall be obtained from one remelted ingot or the
ground outside surface, if required), product of one remelted ingot of each primary melt. The heat
4.1.10 ASTM Specification designation, and year of issue. analysis shall conform to the requirements specified, except
4.1.11 Individual supplementary requirements, if required, that where the heat identity has not been maintained or where
4.1.12 End use, if known, the analysis is not sufficiently complete to permit conformance
4.1.13 Packaging, to be determined, the chemical composition determined from a
4.1.14 Product analysis and chemical analysis, if required product analysis made by the tubular manufacturer shall
(Section 7 and Section 8), conform to the requirements specified for heat analysis. When
4.1.15 Specific requirements, or exceptions to this requested in the order or contract, a report of such analyses
specification, shall be furnished to the purchaser.
A519/A519M − 23
TABLE 3 Chemical Requirements for Alloy Steels
2 2
NOTE 1—The ranges and limits in this table apply to steel not exceeding 200 in. [1300 cm ] in cross-sectional area.
NOTE 2—Small quantities of certain elements are present in alloy steels which are not specified or required. These elements are considered as incidental
and may be present to the following maximum amounts: copper, 0.35 %; nickel, 0.25 %; chromium, 0.20 %; molybdenum, 0.10 %.
NOTE 3—The ranges and limits given in this table apply to heat analysis; except as required by 7.1, product analyses are subject to the applicable
additional tolerances given in Table 5.
A,B
Grade Chemical Composition Limits, %
Designa-
C,D
Carbon Manganese Phospho- Sulfur, Silicon Nickel Chromium Molybde-
tion
C
max
rus, max num
1330 0.28–0.33 1.60–1.90 0.040 0.040 0.15–0.35 . . .
1335 0.33–0.38 1.60–1.90 0.040 0.040 0.15–0.35 . . .
1340 0.38–0.43 1.60–1.90 0.040 0.040 0.15–0.35 . . .
1345 0.43–0.48 1.60–1.90 0.040 0.040 0.15–0.35 . . .
3140 0.38–0.43 0.70–0.90 0.040 0.040 0.15–0.35 1.10–1.40 0.55–0.75 .
E3310 0.08–0.13 0.45–0.60 0.025 0.025 0.15–0.35 3.25–3.75 1.40–1.75 .
4012 0.09–0.14 0.75–1.00 0.040 0.040 0.15–0.35 . . 0.15–0.25
4023 0.20–0.25 0.70–0.90 0.040 0.040 0.15–0.35 . . 0.20–0.30
4024 0.20–0.25 0.70–0.90 0.040 0.035−0.050 0.15–0.35 . . 0.20–0.30
4027 0.25–0.30 0.70–0.90 0.040 0.040 0.15–0.35 . . 0.20–0.30
4028 0.25–0.30 0.70–0.90 0.040 0.035−0.050 0.15–0.35 . . 0.20–0.30
4037 0.35–0.40 0.70–0.90 0.040 0.040 0.15–0.35 . . 0.20–0.30
4042 0.40–0.45 0.70–0.90 0.040 0.040 0.15–0.35 . . 0.20–0.30
4047 0.45–0.50 0.70–0.90 0.040 0.040 0.15–0.35 . . 0.20–0.30
4063 0.60–0.67 0.75–1.00 0.040 0.040 0.15–0.35 . . 0.20–0.30
4118 0.18–0.23 0.70–0.90 0.040 0.040 0.15–0.35 . 0.40–0.60 0.08–0.15
4130 0.28–0.33 0.40–0.60 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4135 0.32–0.39 0.65–0.95 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4137 0.35–0.40 0.70–0.90 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4140 0.38–0.43 0.75–1.00 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4142 0.40–0.45 0.75–1.00 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4145 0.43–0.48 0.75–1.00 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4147 0.45–0.50 0.75–1.00 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4150 0.48–0.53 0.75–1.00 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4320 0.17–0.22 0.45–0.65 0.040 0.040 0.15–0.35 1.65–2.00 0.40–0.60 0.20–0.30
4337 0.35–0.40 0.60–0.80 0.040 0.040 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
E4337 0.35–0.40 0.65–0.85 0.025 0.025 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
4340 0.38–0.43 0.60–0.80 0.040 0.040 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
E4340 0.38–0.43 0.65–0.85 0.025 0.025 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
4422 0.20–0.25 0.70–0.90 0.040 0.040 0.15–0.35 . . 0.35–0.45
4427 0.24–0.29 0.70–0.90 0.040 0.040 0.15–0.35 . . 0.35–0.45
4520 0.18–0.23 0.45–0.65 0.040 0.040 0.15–0.35 . . 0.45–0.60
4615 0.13–0.18 0.45–0.65 0.040 0.040 0.15–0.35 1.65–2.00 . 0.20–0.30
4617 0.15–0.20 0.45–0.65 0.040 0.040 0.15–0.35 1.65–2.00 . 0.20–0.30
4620 0.17–0.22 0.45–0.65 0.040 0.040 0.15–0.35 1.65–2.00 . 0.20–0.30
4621 0.18–0.23 0.70–0.90 0.040 0.040 0.15–0.35 1.65–2.00 . 0.20–0.30
4718 0.16–0.21 0.70–0.90 0.040 0.040 0.15–0.35 0.90–1.20 0.35–0.55 0.30–0.40
4720 0.17–0.22 0.50–0.70 0.040 0.040 0.15–0.35 0.90–1.20 0.35–0.55 0.15–0.25
4815 0.13–0.18 0.40–0.60 0.040 0.040 0.15–0.35 3.25–3.75 . 0.20–0.30
4817 0.15–0.20 0.40–0.60 0.040 0.040 0.15–0.35 3.25–3.75 . 0.20–0.30
4820 0.18–0.23 0.50–0.70 0.040 0.040 0.15–0.35 3.25–3.75 . 0.20–0.30
5015 0.12–0.17 0.30–0.50 0.040 0.040 0.15–0.35 . 0.30–0.50 .
5046 0.43–0.50 0.75–1.00 0.040 0.040 0.15–0.35 . 0.20–0.35 .
5115 0.13–0.18 0.70–0.90 0.040 0.040 0.15–0.35 . 0.70–0.90 .
5120 0.17–0.22 0.70–0.90 0.040 0.040 0.15–0.35 . 0.70–0.90 .
5130 0.28–0.33 0.70–0.90 0.040 0.040 0.15–0.35 . 0.80–1.10 .
5132 0.30–0.35 0.60–0.80 0.040 0.040 0.15–0.35 . 0.75–1.00 .
5135 0.33–0.38 0.60–0.80 0.040 0.040 0.15–0.35 . 0.80–1.05 .
5140 0.38–0.43 0.70–0.90 0.040 0.040 0.15–0.35 . 0.70–0.90 .
5145 0.43–0.48 0.70–0.90 0.040 0.040 0.15–0.35 . 0.70–0.90 .
5147 0.46–0.51 0.70–0.95 0.040 0.040 0.15–0.35 . 0.85–1.15 .
5150 0.48–0.53 0.70–0.90 0.040 0.040 0.15–0.35 . 0.70–0.90 .
5155 0.51–0.59 0.70–0.90 0.040 0.040 0.15–0.35 . 0.70–0.90 .
5160 0.56–0.64 0.75–1.00 0.040 0.040 0.15–0.35 . 0.70–0.90 .
E
52100 0.93–1.05 0.25–0.45 0.025 0.015 0.15–0.35 0.25 max 1.35–1.60 0.10 max
E50100 0.98–1.10 0.25–0.45 0.025 0.025 0.15–0.35 . 0.40–0.60 .
E51100 0.98–1.10 0.25–0.45 0.025 0.025 0.15–0.35 . 0.90–1.15 .
A519/A519M − 23
TABLE 3 Continued
A,B
Grade Chemical Composition Limits, %
Designa-
C,D
Carbon Manganese Phospho- Sulfur, Silicon Nickel Chromium Molybde-
tion
C
max
rus, max num
E52100 0.98–1.10 0.25–0.45 0.025 0.025 0.15–0.35 . 1.30–1.60 .
Vanadium
6118 0.16–0.21 0.50–0.70 0.040 0.040 0.15–0.35 . 0.50–0.70 0.10–0.15
6120 0.17–0.22 0.70–0.90 0.040 0.040 0.15–0.35 . 0.70–0.90 0.10 min
6150 0.48–0.53 0.70–0.90 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15 min
Aluminum Molybdenum
E7140 0.38–0.43 0.50–0.70 0.025 0.025 0.15–0.40 0.95–1.30 1.40–1.80 0.30–0.40
Nickel
8115 0.13–0.18 0.70–0.90 0.040 0.040 0.15–0.35 0.20–0.40 0.30–0.50 0.08–0.15
8615 0.13–0.18 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8617 0.15–0.20 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8620 0.18–0.23 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8622 0.20–0.25 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8625 0.23–0.28 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8627 0.25–0.30 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8630 0.28–0.33 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8637 0.35–0.40 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8640 0.38–0.43 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8642 0.40–0.45 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8645 0.43–0.48 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8650 0.48–0.53 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8655 0.51–0.59 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8660 0.55–0.65 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8720 0.18–0.23 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.20–0.30
8735 0.33–0.38 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.20–0.30
8740 0.38–0.43 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.20–0.30
8742 0.40–0.45 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.20–0.30
8822 0.20–0.25 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.30–0.40
9255 0.51–0.59 0.60–0.80 0.040 0.040 1.80–2.20 . 0.60–0.80 .
9260 0.56–0.64 0.75–1.00 0.040 0.040 1.80–2.20 . . .
9262 0.55–0.65 0.75–1.00 0.040 0.040 1.80–2.20 . 0.25–0.40 .
E9310 0.08–0.13 0.45–0.65 0.025 0.025 0.15–0.35 3.00–3.50 1.00–1.40 0.08–0.15
9840 0.38–0.42 0.70–0.90 0.040 0.040 0.15–0.35 0.85–1.15 0.70–0.90 0.20–0.30
9850 0.48–0.53 0.70–0.90 0.040 0.040 0.15–0.35 0.85–1.15 0.70–0.90 0.20–0.30
50B40 0.38–0.42 0.75–1.00 0.040 0.040 0.15–0.35 . 0.40–0.60 .
50B44 0.43–0.48 0.75–1.00 0.040 0.040 0.15–0.35 . 0.40–0.60 .
50B46 0.43–0.50 0.75–1.00 0.040 0.040 0.15–0.35 . 0.20–0.35 .
50B50 0.48–0.53 0.74–1.00 0.040 0.040 0.15–0.35 . 0.40–0.60 .
50B60 0.55–0.65 0.75–1.00 0.040 0.040 0.15–0.35 . 0.40–0.60 .
51B60 0.56–0.64 0.75–1.00 0.040 0.040 0.15–0.35 . 0.70–0.90 .
81B45 0.43–0.48 0.75–1.00 0.040 0.040 0.15–0.35 0.20–0.40 0.35–0.55 0.08–0.15
86B45 0.43–0.48 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
94B15 0.13–0.18 0.75–1.00 0.040 0.040 0.15–0.35 0.30–0.60 0.30–0.50 0.08–0.15
94B17 0.15–0.20 0.75–1.00 0.040 0.040 0.15–0.35 0.30–0.60 0.30–0.50 0.08–0.15
94B30 0.28–0.33 0.75–1.00 0.040 0.040 0.15–0.35 0.30–0.60 0.30–0.50 0.08–0.15
94B40 0.38–0.43 0.75–1.00 0.040 0.040 0.15–0.35 0.30–0.60 0.30–0.50 0.08–0.15
A
Grades shown in this table with prefix letter E generally are manufactured by the basic-electric-furnace process. All others may be manufactured by any commercially
viable steel making process or by the basic-electric-furnace process with adjustments in phosphorus and sulfur.
B
Grades shown in this table with the letter B, such as 50B40, can be expected to have 0.0005 % minimum boron control.
C
The phosphorus sulfur limitations for each process are as follows:
Basic electric furnace 0.025 max % Acid electric furnace 0.050 max %
D
Minimum and maximum sulfur content indicates resulfurized steels.
E
The purchaser may specify the following maximum amounts: copper, 0.30 %; aluminum, 0.050 %; and oxygen, 0.0015 %.
A519/A519M − 23
TABLE 4 Chemical Requirements of Resulfurized or TABLE 5 Product Analysis Tolerances Over or Under Specified
A
Rephosphorized, or Both, Carbon Steels Range or Limit
Grade Chemical Composition Limits, %
NOTE 1—Individual determinations may vary from the specified heat
Desig-
Carbon Manganese Phosphorus Sulfur Lead
limits or ranges to the extent shown in this table except that any element
nation
in a heat may not vary both above and below a specified range.
1118 0.14–0.20 1.30–1.60 0.040 max 0.08–0.13
NOTE 2—In all types of steel, because of the degree to which
11L18 0.14–0.20 1.30–1.60 0.040 max 0.08–0.13 0.15–0.35
phosphorus and sulfur segregate, product analysis for these elements is not
1132 0.27–0.32 1.35–1.65 0.040 max 0.08–0.13
technologically appropriate for rephosphorized or resulfurized steels
1137 0.32–0.39 1.35–1.65 0.040 max 0.08–0.13
unless misapplication is clearly indicated.
1141 0.37–0.45 1.35–1.65 0.040 max 0.08–0.13
1144 0.40–0.48 1.35–1.65 0.040 max 0.24–0.33 Carbon Steel Seamless Tubes
1213 0.13 max 0.70–1.00 0.07–0.12 0.24–0.33
Element Limit, or Maximum of Specified Tolerance, Over the Maximum
12L14 0.15 max 0.85–1.15 0.04–0.09 0.26–0.35 0.15–0.35
Range, % Limit or Under the Minimum
1215 0.09 max 0.75–1.05 0.04–0.09 0.26–0.35
Limit, %
A
The ranges and limits given in this table apply to heat analysis; except as
Under min Over max
required by 7.1, product analyses are subject to the applicable additional toler-
ances given in Table 5.
Carbon to 0.25, incl 0.02 0.02
over 0.25 to 0.55, incl 0.03 0.03
over 0.55 0.04 0.04
Manganese to 0.90, incl 0.03 0.03
8. Product Analysis
over 0.90 to 1.65, incl 0.06 0.06
Phosphorus basic steel to 0.05, incl . . . 0.008
8.1 Except as required by 7.1, a product analysis by the
acid-bessemer steel to 0.12, . . . 0.010
manufacturer shall be required only when requested in the
incl
order.
Sulfur to 0.06, incl . . . 0.008
Silicon to 0.35, incl 0.02 0.02
8.1.1 Heat Identity Maintained—One product analysis per
over 0.35 to 0.60, incl 0.05 0.05
heat on either billet or tube.
Copper . . . 0.02 0.02
8.1.2 Heat Identity Not Maintained—A product analysis
Alloy Steel Seamless Tube
from one tube per 2000 ft [600 m] or less for sizes over 3 in.
Elements Limit, or Maximum of Tolerance Over Maximum
[75 mm], and one tube per 5000 ft [1500 m] or less for sizes 3
Specified Element, % Limit or Under Minimum Limit
for Size Ranges Shown, %
in. [75 mm] and under.
100 in. Over 100 to
8.2 Samples for chemical analysis, except for spectrochemi- 2 2
[645 cm ] 200 in.
or less [645 to 1290
cal analysis, shall be taken in accordance with Test Methods
cm ], incl
and Practices A751. The composition thus determined shall
correspond to the requirements in the applicable section or
Carbon to 0.30, incl 0.01 0.02
Tables 1-5 of this specification and shall be reported to the
over 0.30 to 0.75, incl 0.02 0.03
over 0.75 0.03 0.04
purchaser or the purchaser’s representative.
Manganese to 0.90, incl 0.03 0.04
8.3 If the original test for check analysis fails, retests of two
over 0.90 to 2.10, incl 0.04 0.05
Phosphorus over max, only 0.005 0.010
additional billets or tubes shall be made. Both retests for the
Sulfur to 0.060, incl 0.005 0.010
elements in question shall meet the requirements of the
Silicon to 0.35, incl 0.02 0.02
specification; otherwise all remaining material in the heat or lot over 0.35 to 2.20, incl 0.05 0.06
Nickel to 1.00, incl 0.03 0.03
shall be rejected or, at the option of the producer, each billet or
over 1.00 to 2.00, incl 0.05 0.05
tube may be individually tested for acceptance. Billets or tubes
over 2.00 to 5.30, incl 0.07 0.07
which do not meet the requirements of the specification shall over 5.30 to 10.00, incl 0.10 0.10
Chromium to 0.90, incl 0.03 0.04
be rejected.
over 0.90 to 2.10, incl 0.05 0.06
over 2.10 to 3.99, incl 0.10 0.10
9. Permissible Variations in Dimensions of Round Tubing
Molybdenum to 0.20, incl 0.01 0.01
over 0.20 to 0.40, incl 0.02 0.03
9.1 Hot-Finished Mechanical Tubing—Hot-finished me-
over 0.40 to 1.15, incl 0.03 0.04
chanical tubing is produced to outside diameter and wall
Vanadium to 0.10, incl 0.01 0.01
over 0.10 to 0.25, incl 0.02 0.02
thickness. Variations in outside diameter and wall thickness
over 0.25 to 0.50, incl 0.03 0.03
shall not exceed the tolerances shown in Table 6 and Table 7.
min value specified, check 0.01 0.01
Table 6 and Table 7 cover these tolerances and apply to the
under min limit
Tungsten to 1.00, incl 0.04 0.05
specified size.
over 1.00 to 4.00, incl 0.08 0.09
9.2 Cold-Worked Mechanical Tubing:
Aluminum up to 0.10, incl 0.03 . . .
over 0.10 to 0.20, incl 0.04 . . .
9.2.1 Variations in outside diameter, inside diameter and
over 0.20 to 0.30, incl 0.05 . . .
wall thickness shall not exceed the tolerances shown in Tables
over 0.30 to 0.80, incl 0.07 . . .
8-10. over 0.80 to 1.80, incl 0.10 . . .
9.2.2 Cold-worked mechanical tubing is normally produced
to outside diameter and wall thickness. If the inside diameter is
a more important dimension, then cold-worked tubing should
be specified to inside diameter and wall thickness or outside 9.3 Rough-Turned Mechanical Tubing—Variation in outside
diameter and inside diameter. diameter and wall thickness shall not exceed the tolerance in
A519/A519M − 23
TABLE 6 Outside Diameter Tolerances for Round Hot-Finished
6b 5 c × 0.006
A,B,C
Tubing
where:
Outside Diameter Size Range, Outside Diameter Tolerance, in. [mm]
in. [mm] Over Under
b = tolerance for out-of-square, in. [mm], and
c = largest external dimension across flats, in. [mm].
Up to 2.999 [76.17] 0.020 [0.51] 0.020 [0.51]
3.000–4.499 [76.20–114.27] 0.025 [0.64] 0.025 [0.64] 10.3.2 The squareness of sides is commonly determined by
4.500–5.999 [114.30–152.37] 0.031 [0.79] 0.031 [0.79]
one of the following methods:
6.000–7.499 [152.40–190.47] 0.037 [0.94] 0.037 [0.94]
10.3.2.1 A square, with two adjustable contact points on
7.500–8.999 [190.50–228.57] 0.045 [1.14] 0.045 [1.14]
9.000–10.750 [228.60–273.05] 0.050 [1.27] 0.050 [1.27] each arm, is placed on two sides. A fixed feeler gage is then
A
used to measure the maximum distance between the free
Diameter tolerances are not applicable to normalized and tempered or quenched
and tempered conditions.
contact point and the surface of the tubing.
B
1 3
The common range of sizes of hot finished tubes is 1 ⁄2 in. [38.1 mm] to 10 ⁄4 in.
10.3.2.2 A square, equipped with direct-reading vernier,
[273.0 mm] outside diameter with wall thickness at least 3 % or more of outside
may be used to determine the angular deviation which in turn
diameter, but not less than 0.095 in. [2.41 mm].
C
Larger sizes are available; consult manufacturer for sizes and tolerances.
may be related to distance, in inches.
10.4 Twist Tolerance:
10.4.1 Twist tolerance for square and rectangular tubing
TABLE 7 Wall Thickness Tolerances for Round Hot-Finished
shall be in accordance with Table 17. The twist tolerance in
Tubing
A
square and rectangular tubing may be measured by holding one
Wall Thickness Wall Thickness Tolerance, percent Over
and Under Nominal
Range as Percent
end of the square or rectangular tube on a surface plate with the
of Outside
Outside Outside Outside
bottom side parallel to the surface plate and noting the height
Diameter
Diameter Diameter Diameter
at either corner of the opposite end of the same side above the
2.999 in. 3.000 in. 6.000 in.
[76.19 mm] [76.20 mm] [152.40 mm] surface plate.
and smaller to 5.999 in. to 10.750 in.
10.4.2 Twist may also be measured by the use of a beveled
[152.37 mm] [273.05 mm]
protractor, equipped with a level, and noting the angular
deviation on opposite ends or at any point throughout the
Under 15 12.5 10.0 10.0
15 and over 10.0 7.5 10.0 length.
A
Wall thickness tolerances may not be applicable to walls 0.199 in. [5.05 mm] and
10.5 Lengths—Square and rectangular tubing is commonly
less; consult manufacturer for wall tolerances on such tube sizes.
furnished in mill lengths 5 ft [1.5 m] and over. Definite cut
lengths are furnished when specified by the purchaser. Length
tolerances are shown in Table 18 and Table 9.
Table 11. Table 11 covers tolerances as applied to outside
10.6 Straightness—Straightness for square and rectangular
diameter and wall thickness and applies to the specified size.
tubing shall be 0.060 in. in any 3 ft [1.5 mm in 1 m].
9.4 Ground Mechanical Tubing—Variation in outside diam-
eter shall not exceed the tolerances in Table 12. This product is
11. Machining Allowances
normally produced from a cold-worked tube.
11.1 For the method of calculating the tube size required to
9.5 Lengths—Mechanical tubing is commonly furnished in
cleanup in machining to a particular finished part, see Appen-
mill lengths, 5 ft [1.5 m] and over. Definite cut lengths are
dix X1.
furnished when specified by the purchaser. Length tolerances
are shown in Table 13.
12. Workmanship, Finish, and Appearance
9.6 Straightness—The straightness tolerances for seamless
12.1 The tubing shall be free of laps, cracks, seams, and
round tubing shall not exceed the amounts shown in Table 14.
other defects as is consistent with good commercial practice.
The surface finish will be compatible with the condition to
10. Permissible Variations in Dimensions of Square and
which it is ordered.
Rectangular Tubing
10.1 Variations in outside dimensions and wall thickness
13. Condition
shall not exceed the tolerances shown in Table 15 unless
13.1 The purchaser shall specify a sizing method and, if
otherwise specified by the manufacturer and the purchaser. The
required, a thermal treatment.
wall thickness dimensions shall not apply at the corners.
13.1.1 Sizing Methods:
10.2 Corner Radii—The corners of a square and a rectan-
13.1.1.1 HF—Hot Finished,
gular tube will be slightly rounded inside and rounded outside
13.1.1.2 CW—Cold Worked,
consistent with the wall thickness. The outside corner may be
13.1.1.3 RT—Rough Turned,
slightly flattened. The radii of corners for square and rectan-
13.1.1.4 G—Ground.
gular cold finished tubing shall be in accordance with Table 16.
13.1.2 Thermal Treatments:
10.3 Squareness Tolerance: 13.1.2.1 A—Annealed,
10.3.1 Permissible variations for squareness for the side of 13.1.2.2 N—Normalized,
square and rectangular tubing shall be determined by the 13.1.2.3 QT—Quenched and Tempered,
following equation: 13.1.2.4 SR—Stress Relieved or Finish Anneal.
A519/A519M − 23
A,B,C
TABLE 8 Outside and Inside Diameter Tolerances for Round Cold-Worked Tubing (Inch Units)
Outside Thermal Treatment after Final Cold Work Producing Size
Diameter
Wall None, or not exceeding Heated Above 1100 °F Nominal Quenched and Tempered
Size Range,
Thickness 1100 °F Nominal Temperature Without
in.
As Percent Temperature Accelerated Cooling
of Outside
OD, in. ID, in. OD, in. ID, in. OD, in. ID, in.
Diameter
Over Under Over Under Over Under Over Under Over Under Over Under
Up to 0.499 all 0.004 0.000 — — 0.005 0.002 — — 0.010 0.010 0.010 0.010
0.500–1.699 all 0.005 0.000 0.000 0.005 0.007 0.002 0.002 0.007 0.015 0.015 0.015 0.015
1.700–2.099 all 0.006 0.000 0.000 0.006 0.006 0.005 0.005 0.006 0.020 0.020 0.020 0.020
2.100–2.499 all 0.007 0.000 0.000 0.007 0.008 0.005 0.005 0.008 0.023 0.023 0.023 0.023
2.500–2.899 all 0.008 0.000 0.000 0.008 0.009 0.005 0.005 0.009 0.025 0.025 0.025 0.025
2.900–3.299 all 0.009 0.000 0.000 0.009 0.011 0.005 0.005 0.011 0.028 0.028 0.028 0.028
3.300–3.699 all 0.010 0.000 0.000 0.010 0.013
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A519/A519M − 17 A519/A519M − 23
Standard Specification for
Seamless Carbon and Alloy Steel Mechanical Tubing
This standard is issued under the fixed designation A519/A519M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This specification covers several grades of carbon and alloy steel seamless mechanical tubing. The grades are listed in Tables
1-3. When welding is used for joining the weldable mechanical tube grades, the welding procedure shall be suitable for the grade,
the condition of the components, and the intended service.
1.2 This specification covers both seamless hot-finished mechanical tubing and seamless cold-finished mechanical tubing in sizes
up to and including 12 ⁄4 in. [325 mm] outside diameter for round tubes with wall thicknesses as required.
1.3 The tubes shall be furnished in the following shapes, as specified by the purchaser: round, square, rectangular, and special
sections.
1.4 Supplementary requirements of an optional nature are provided and when desired shall be so stated in the order.
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as the standard. Within the text, the SI
units are shown in brackets or parentheses. The values stated in each system may not be exact equivalents; therefore, each system
shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
The inch-pound units shall apply unless the “M” designation of this specification is specified in the order. In this specification hard
or rationalized conversions apply to diameter, lengths and tensile properties. Soft conversion applies to other SI measurements.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A751 Test Methods and Practices for Chemical Analysis of Steel Products
A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
A1040 Guide for Specifying Harmonized Standard Grade Compositions for Wrought Carbon, Low-Alloy, and Alloy Steels
A1058 Test Methods for Mechanical Testing of Steel Products—Metric
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.09
on Carbon Steel Tubular Products.
Current edition approved May 1, 2017Sept. 1, 2023. Published June 2017October 2023. Originally approved in 1964. Last previous edition approved in 20122017 as
A519 – 06 (2012).A519/A519M – 17. DOI: 10.1520/A0519_A0519M-17.10.1520/A0519_A0519M-23.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A519/A519M − 23
TABLE 1 Chemical Requirements of Low-Carbon Steels
Chemical Composition Limits, %
Grade
A B B B
Carbon Manganese Phosphorous, Sulfur,
Designation
max max
MT 1010 0.05–0.15 0.30–0.60 0.040 0.050
MT 1015 0.10–0.20 0.30–0.60 0.040 0.050
MT X 1015 0.10–0.20 0.60–0.90 0.040 0.050
MT 1020 0.15–0.25 0.30–0.60 0.040 0.050
MT X 1020 0.15–0.25 0.70–1.00 0.040 0.050
A
Limits apply to heat and product analyses.
B
Limits apply to heat analysis; except as required by 6.17.1, product analyses are
subject to the applicable additional tolerances given in Table 5.
TABLE 2 Chemical Requirements of Other Carbon Steels
A
Chemical Composition Limits, %
Grade
Phosphorous, Sulfur,
Designation Carbon Manganese
max max
1008 0.10 max 0.30–0.50 0.040 0.050
1010 0.08–0.13 0.30–0.60 0.040 0.050
1012 0.10–0.15 0.30–0.60 0.040 0.050
1015 0.13–0.18 0.30–0.60 0.040 0.050
1016 0.13–0.18 0.60–0.90 0.040 0.050
1017 0.15–0.20 0.30–0.60 0.040 0.050
1018 0.15–0.20 0.60–0.90 0.040 0.050
1019 0.15–0.20 0.70–1.00 0.040 0.050
1020 0.18–0.23 0.30–0.60 0.040 0.050
1021 0.18–0.23 0.60–0.90 0.040 0.050
1022 0.18–0.23 0.70–1.00 0.040 0.050
1025 0.22–0.28 0.30–0.60 0.040 0.050
1026 0.22–0.28 0.60–0.90 0.040 0.050
1030 0.28–0.34 0.60–0.90 0.040 0.050
1035 0.32–0.38 0.60–0.90 0.040 0.050
1040 0.37–0.44 0.60–0.90 0.040 0.050
1045 0.43–0.50 0.60–0.90 0.040 0.050
1050 0.48–0.55 0.60–0.90 0.040 0.050
1518 0.15–0.21 1.10–1.40 0.040 0.050
1524 0.19–0.25 1.35–1.65 0.040 0.050
1541 0.36–0.44 1.35–1.65 0.040 0.050
A
The ranges and limits given in this table apply to heat analysis; except as
required by 6.17.1, product analyses are subject to the applicable additional
tolerances given in Table 5.
2.2 Military Standards:
MIL-STD-129 Marking for Shipment and Storage
MIL-STD-163 Steel Mill Products Preparation for Shipment and Storage
2.3 Federal Standard:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
3. Terminology
3.1 Definitions of Terms—For definitions of terms used in this standard refer to:
3.1.1 Terminology A941 for general steel terminology,
3.1.2 Test Methods and Definitions A370 or Test Methods A1058 for mechanical testing of steel products terminology, and
3.1.3 Test Methods and Practices A751 for chemical analysis of steel products terminology.
4. Ordering Information
4.1 Orders for material under this specification should include the following, as required, to describe the desired material
adequately:
Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
A519/A519M − 23
TABLE 3 Chemical Requirements for Alloy Steels
2 2
NOTE 1—The ranges and limits in this table apply to steel not exceeding 200 in. [1300 cm ] in cross-sectional area.
NOTE 2—Small quantities of certain elements are present in alloy steels which are not specified or required. These elements are considered as incidental
and may be present to the following maximum amounts: copper, 0.35 %; nickel, 0.25 %; chromium, 0.20 %; molybdenum, 0.10 %.
NOTE 3—The ranges and limits given in this table apply to heat analysis; except as required by 6.17.1, product analyses are subject to the applicable
additional tolerances given in Table 5.
A,B
Grade Chemical Composition Limits, %
Designa-
C,D
Carbon Manganese Phospho- Sulfur, Silicon Nickel Chromium Molybde-
tion
C
max
rus, max num
1330 0.28–0.33 1.60–1.90 0.040 0.040 0.15–0.35 . . .
1335 0.33–0.38 1.60–1.90 0.040 0.040 0.15–0.35 . . .
1340 0.38–0.43 1.60–1.90 0.040 0.040 0.15–0.35 . . .
1345 0.43–0.48 1.60–1.90 0.040 0.040 0.15–0.35 . . .
3140 0.38–0.43 0.70–0.90 0.040 0.040 0.15–0.35 1.10–1.40 0.55–0.75 .
E3310 0.08–0.13 0.45–0.60 0.025 0.025 0.15–0.35 3.25–3.75 1.40–1.75 .
4012 0.09–0.14 0.75–1.00 0.040 0.040 0.15–0.35 . . 0.15–0.25
4023 0.20–0.25 0.70–0.90 0.040 0.040 0.15–0.35 . . 0.20–0.30
4024 0.20–0.25 0.70–0.90 0.040 0.035−0.050 0.15–0.35 . . 0.20–0.30
4027 0.25–0.30 0.70–0.90 0.040 0.040 0.15–0.35 . . 0.20–0.30
4028 0.25–0.30 0.70–0.90 0.040 0.035−0.050 0.15–0.35 . . 0.20–0.30
4037 0.35–0.40 0.70–0.90 0.040 0.040 0.15–0.35 . . 0.20–0.30
4042 0.40–0.45 0.70–0.90 0.040 0.040 0.15–0.35 . . 0.20–0.30
4047 0.45–0.50 0.70–0.90 0.040 0.040 0.15–0.35 . . 0.20–0.30
4063 0.60–0.67 0.75–1.00 0.040 0.040 0.15–0.35 . . 0.20–0.30
4118 0.18–0.23 0.70–0.90 0.040 0.040 0.15–0.35 . 0.40–0.60 0.08–0.15
4130 0.28–0.33 0.40–0.60 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4135 0.32–0.39 0.65–0.95 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4137 0.35–0.40 0.70–0.90 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4140 0.38–0.43 0.75–1.00 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4142 0.40–0.45 0.75–1.00 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4145 0.43–0.48 0.75–1.00 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4147 0.45–0.50 0.75–1.00 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4150 0.48–0.53 0.75–1.00 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
4320 0.17–0.22 0.45–0.65 0.040 0.040 0.15–0.35 1.65–2.00 0.40–0.60 0.20–0.30
4337 0.35–0.40 0.60–0.80 0.040 0.040 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
E4337 0.35–0.40 0.65–0.85 0.025 0.025 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
4340 0.38–0.43 0.60–0.80 0.040 0.040 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
E4340 0.38–0.43 0.65–0.85 0.025 0.025 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
4422 0.20–0.25 0.70–0.90 0.040 0.040 0.15–0.35 . . 0.35–0.45
4427 0.24–0.29 0.70–0.90 0.040 0.040 0.15–0.35 . . 0.35–0.45
4520 0.18–0.23 0.45–0.65 0.040 0.040 0.15–0.35 . . 0.45–0.60
4615 0.13–0.18 0.45–0.65 0.040 0.040 0.15–0.35 1.65–2.00 . 0.20–0.30
4617 0.15–0.20 0.45–0.65 0.040 0.040 0.15–0.35 1.65–2.00 . 0.20–0.30
4620 0.17–0.22 0.45–0.65 0.040 0.040 0.15–0.35 1.65–2.00 . 0.20–0.30
4621 0.18–0.23 0.70–0.90 0.040 0.040 0.15–0.35 1.65–2.00 . 0.20–0.30
4718 0.16–0.21 0.70–0.90 0.040 0.040 0.15–0.35 0.90–1.20 0.35–0.55 0.30–0.40
4720 0.17–0.22 0.50–0.70 0.040 0.040 0.15–0.35 0.90–1.20 0.35–0.55 0.15–0.25
4815 0.13–0.18 0.40–0.60 0.040 0.040 0.15–0.35 3.25–3.75 . 0.20–0.30
4817 0.15–0.20 0.40–0.60 0.040 0.040 0.15–0.35 3.25–3.75 . 0.20–0.30
4820 0.18–0.23 0.50–0.70 0.040 0.040 0.15–0.35 3.25–3.75 . 0.20–0.30
5015 0.12–0.17 0.30–0.50 0.040 0.040 0.15–0.35 . 0.30–0.50 .
5046 0.43–0.50 0.75–1.00 0.040 0.040 0.15–0.35 . 0.20–0.35 .
5115 0.13–0.18 0.70–0.90 0.040 0.040 0.15–0.35 . 0.70–0.90 .
5120 0.17–0.22 0.70–0.90 0.040 0.040 0.15–0.35 . 0.70–0.90 .
5130 0.28–0.33 0.70–0.90 0.040 0.040 0.15–0.35 . 0.80–1.10 .
5132 0.30–0.35 0.60–0.80 0.040 0.040 0.15–0.35 . 0.75–1.00 .
5135 0.33–0.38 0.60–0.80 0.040 0.040 0.15–0.35 . 0.80–1.05 .
5140 0.38–0.43 0.70–0.90 0.040 0.040 0.15–0.35 . 0.70–0.90 .
5145 0.43–0.48 0.70–0.90 0.040 0.040 0.15–0.35 . 0.70–0.90 .
5147 0.46–0.51 0.70–0.95 0.040 0.040 0.15–0.35 . 0.85–1.15 .
5150 0.48–0.53 0.70–0.90 0.040 0.040 0.15–0.35 . 0.70–0.90 .
5155 0.51–0.59 0.70–0.90 0.040 0.040 0.15–0.35 . 0.70–0.90 .
5160 0.56–0.64 0.75–1.00 0.040 0.040 0.15–0.35 . 0.70–0.90 .
E
52100 0.93–1.05 0.25–0.45 0.025 0.015 0.15–0.35 0.25 max 1.35–1.60 0.10 max
E50100 0.98–1.10 0.25–0.45 0.025 0.025 0.15–0.35 . 0.40–0.60 .
E51100 0.98–1.10 0.25–0.45 0.025 0.025 0.15–0.35 . 0.90–1.15 .
A519/A519M − 23
TABLE 3 Continued
A,B
Grade Chemical Composition Limits, %
Designa-
C,D
Carbon Manganese Phospho- Sulfur, Silicon Nickel Chromium Molybde-
tion
C
max
rus, max num
E52100 0.98–1.10 0.25–0.45 0.025 0.025 0.15–0.35 . 1.30–1.60 .
Vanadium
6118 0.16–0.21 0.50–0.70 0.040 0.040 0.15–0.35 . 0.50–0.70 0.10–0.15
6120 0.17–0.22 0.70–0.90 0.040 0.040 0.15–0.35 . 0.70–0.90 0.10 min
6150 0.48–0.53 0.70–0.90 0.040 0.040 0.15–0.35 . 0.80–1.10 0.15 min
Aluminum Molybdenum
E7140 0.38–0.43 0.50–0.70 0.025 0.025 0.15–0.40 0.95–1.30 1.40–1.80 0.30–0.40
Nickel
8115 0.13–0.18 0.70–0.90 0.040 0.040 0.15–0.35 0.20–0.40 0.30–0.50 0.08–0.15
8615 0.13–0.18 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8617 0.15–0.20 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8620 0.18–0.23 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8622 0.20–0.25 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8625 0.23–0.28 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8627 0.25–0.30 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8630 0.28–0.33 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8637 0.35–0.40 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8640 0.38–0.43 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8642 0.40–0.45 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8645 0.43–0.48 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8650 0.48–0.53 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8655 0.51–0.59 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8660 0.55–0.65 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
8720 0.18–0.23 0.70–0.90 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.20–0.30
8735 0.33–0.38 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.20–0.30
8740 0.38–0.43 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.20–0.30
8742 0.40–0.45 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.20–0.30
8822 0.20–0.25 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.30–0.40
9255 0.51–0.59 0.60–0.80 0.040 0.040 1.80–2.20 . 0.60–0.80 .
9260 0.56–0.64 0.75–1.00 0.040 0.040 1.80–2.20 . . .
9262 0.55–0.65 0.75–1.00 0.040 0.040 1.80–2.20 . 0.25–0.40 .
E9310 0.08–0.13 0.45–0.65 0.025 0.025 0.15–0.35 3.00–3.50 1.00–1.40 0.08–0.15
9840 0.38–0.42 0.70–0.90 0.040 0.040 0.15–0.35 0.85–1.15 0.70–0.90 0.20–0.30
9850 0.48–0.53 0.70–0.90 0.040 0.040 0.15–0.35 0.85–1.15 0.70–0.90 0.20–0.30
50B40 0.38–0.42 0.75–1.00 0.040 0.040 0.15–0.35 . 0.40–0.60 .
50B44 0.43–0.48 0.75–1.00 0.040 0.040 0.15–0.35 . 0.40–0.60 .
50B46 0.43–0.50 0.75–1.00 0.040 0.040 0.15–0.35 . 0.20–0.35 .
50B50 0.48–0.53 0.74–1.00 0.040 0.040 0.15–0.35 . 0.40–0.60 .
50B60 0.55–0.65 0.75–1.00 0.040 0.040 0.15–0.35 . 0.40–0.60 .
51B60 0.56–0.64 0.75–1.00 0.040 0.040 0.15–0.35 . 0.70–0.90 .
81B45 0.43–0.48 0.75–1.00 0.040 0.040 0.15–0.35 0.20–0.40 0.35–0.55 0.08–0.15
86B45 0.43–0.48 0.75–1.00 0.040 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
94B15 0.13–0.18 0.75–1.00 0.040 0.040 0.15–0.35 0.30–0.60 0.30–0.50 0.08–0.15
94B17 0.15–0.20 0.75–1.00 0.040 0.040 0.15–0.35 0.30–0.60 0.30–0.50 0.08–0.15
94B30 0.28–0.33 0.75–1.00 0.040 0.040 0.15–0.35 0.30–0.60 0.30–0.50 0.08–0.15
94B40 0.38–0.43 0.75–1.00 0.040 0.040 0.15–0.35 0.30–0.60 0.30–0.50 0.08–0.15
A
Grades shown in this table with prefix letter E generally are manufactured by the basic-electric-furnace process. All others may be manufactured by any commercially
viable steel making process or by the basic-electric-furnace process with adjustments in phosphorus and sulfur.
B
Grades shown in this table with the letter B, such as 50B40, can be expected to have 0.0005 % minimum boron control.
C
The phosphorus sulfur limitations for each process are as follows:
Basic electric furnace 0.025 max % Acid electric furnace 0.050 max %
D
Minimum and maximum sulfur content indicates resulfurized steels.
E
The purchaser may specify the following maximum amounts: copper, 0.30 %; aluminum, 0.050 %; and oxygen, 0.0015 %.
4.1.1 Quantity (feet, weight, or number of pieces),
A519/A519M − 23
4.1.2 Name of material (seamless carbon or alloy steel mechanical tubing),
4.1.3 Form (round, square, rectangular or special shapes, Section 1),
4.1.4 Dimensions (round, outside diameters and wall thickness, Section 89; square and rectangular, outside dimensions and wall
thickness, Section 910; other, specify),
4.1.5 Length (specific or random, mill lengths, see 8.59.5 and 9.510.5),
4.1.6 Manufacture (hot finished or cold finished, 4.55.5 and 4.65.6),
4.1.7 Grade (Section 56),
4.1.8 Condition (sizing method and thermal treatment, Section 1213),
4.1.9 Surface finish (special pickling, shot blasting, or ground outside surface, if required),
4.1.10 ASTM Specification designation, and year of issue.
4.1.11 Individual supplementary requirements, if required,
4.1.12 End use, if known,
4.1.13 Packaging,
4.1.14 Product analysis and chemical analysis, if required (Section 67 and Section 78),
4.1.15 Specific requirements, or exceptions to this specification,
4.1.16 Special marking (Section 1516), and
4.1.17 Special packing (Section 1617).
5. Materials and Manufacture
5.1 The steel may be made by any process.
5.2 If a specific type of melting is required by the purchaser, it shall be as stated on the purchase order.
5.3 The primary melting may incorporate separate degassing or refining, and may be followed by secondary melting, such as
electroslag or vacuum-arc remelting. If secondary melting is employed, the heat shall be defined as all of the ingots remelted from
a single primary heat.
5.4 Steel may be cast in ingots or may be strand cast. When steel of different grades is sequentially strand cast, identification of
the resultant transition material is required. The producer shall remove the transition material by an established procedure that
positively separates the grades.
5.5 Tubes shall be made by a seamless process and shall be either hot finished or cold finished, as specified.
5.6 Seamless tubing is a tubular product made without a welded seam. It is manufactured usually by hot working steel and, if
necessary, by subsequently cold finishing the hot-worked tubular product to produce the desired shape, dimensions and properties.
A519/A519M − 23
6. Chemical Composition
6.1 The steel shall conform to the requirements as to chemical composition prescribed in Table 1 (Low Carbon MT Grades), Table
2 (Higher Carbon Steels), Table 3 (Alloy Standard Steels (see Guide A1040)) and Table 4 (Resulfurized or Rephosphorized, or
Both, Carbon Steels (see Guide A1040)).
6.2 Grade MT1015 or MTX1020 will be supplied at the producer’s option, when no grade is specified.
6.3 When a carbon steel grade is ordered under this specification, supplying an alloy grade that specifically requires the addition
of any element other than those listed for the ordered grade in Table 1 and Table 2 is not permitted.
6.4 Analyses of steels other than those listed are available. To determine their availability, the purchaser should contact the
producer.
7. Heat Analysis
7.1 An analysis of each heat of steel shall be made by the steel manufacturer to determine the percentages of the elements
specified; if secondary melting processes are used, the heat analysis shall be obtained from one remelted ingot or the product of
one remelted ingot of each primary melt. The heat analysis shall conform to the requirements specified, except that where the heat
identity has not been maintained or where the analysis is not sufficiently complete to permit conformance to be determined, the
chemical composition determined from a product analysis made by the tubular manufacturer shall conform to the requirements
specified for heat analysis. When requested in the order or contract, a report of such analyses shall be furnished to the purchaser.
8. Product Analysis
8.1 Except as required by 6.17.1, a product analysis by the manufacturer shall be required only when requested in the order.
8.1.1 Heat Identity Maintained—One product analysis per heat on either billet or tube.
8.1.2 Heat Identity Not Maintained—A product analysis from one tube per 2000 ft [600 m] or less for sizes over 3 in. [75 mm],
and one tube per 5000 ft [1500 m] or less for sizes 3 in. [75 mm] and under.
8.2 Samples for chemical analysis, except for spectrochemical analysis, shall be taken in accordance with Practice Test Methods
and Practices A751. The composition thus determined shall correspond to the requirements in the applicable section or Tables 1-5
of this specification and shall be reported to the purchaser or the purchaser’s representative.
8.3 If the original test for check analysis fails, retests of two additional billets or tubes shall be made. Both retests for the elements
in question shall meet the requirements of the specification; otherwise all remaining material in the heat or lot shall be rejected
or, at the option of the producer, each billet or tube may be individually tested for acceptance. Billets or tubes which do not meet
the requirements of the specification shall be rejected.
TABLE 4 Chemical Requirements of Resulfurized or
A
Rephosphorized, or Both, Carbon Steels
Grade Chemical Composition Limits, %
Desig-
Carbon Manganese Phosphorus Sulfur Lead
nation
1118 0.14–0.20 1.30–1.60 0.040 max 0.08–0.13
11L18 0.14–0.20 1.30–1.60 0.040 max 0.08–0.13 0.15–0.35
1132 0.27–0.32 1.35–1.65 0.040 max 0.08–0.13
1137 0.32–0.39 1.35–1.65 0.040 max 0.08–0.13
1141 0.37–0.45 1.35–1.65 0.040 max 0.08–0.13
1144 0.40–0.48 1.35–1.65 0.040 max 0.24–0.33
1213 0.13 max 0.70–1.00 0.07–0.12 0.24–0.33
12L14 0.15 max 0.85–1.15 0.04–0.09 0.26–0.35 0.15–0.35
1215 0.09 max 0.75–1.05 0.04–0.09 0.26–0.35
A
The ranges and limits given in this table apply to heat analysis; except as
required by 6.17.1, product analyses are subject to the applicable additional
tolerances given in Table 5.
A519/A519M − 23
TABLE 5 Product Analysis Tolerances Over or Under Specified
Range or Limit
NOTE 1—Individual determinations may vary from the specified heat
limits or ranges to the extent shown in this table except that any element
in a heat may not vary both above and below a specified range.
NOTE 2—In all types of steel, because of the degree to which
phosphorus and sulfur segregate, product analysis for these elements is not
technologically appropriate for rephosphorized or resulfurized steels
unless misapplication is clearly indicated.
Carbon Steel Seamless Tubes
Element Limit, or Maximum of Specified Tolerance, Over the Maximum
Range, % Limit or Under the Minimum
Limit, %
Under min Over max
Carbon to 0.25, incl 0.02 0.02
over 0.25 to 0.55, incl 0.03 0.03
over 0.55 0.04 0.04
Manganese to 0.90, incl 0.03 0.03
over 0.90 to 1.65, incl 0.06 0.06
Phosphorus basic steel to 0.05, incl . . . 0.008
acid-bessemer steel to 0.12, . . . 0.010
incl
Sulfur to 0.06, incl . . . 0.008
Silicon to 0.35, incl 0.02 0.02
over 0.35 to 0.60, incl 0.05 0.05
Copper . . . 0.02 0.02
Alloy Steel Seamless Tube
Elements Limit, or Maximum of Tolerance Over Maximum
Specified Element, % Limit or Under Minimum Limit
for Size Ranges Shown, %
100 in. Over 100 to
2 2
[645 cm ] 200 in.
or less [645 to 1290
cm ], incl
Carbon to 0.30, incl 0.01 0.02
over 0.30 to 0.75, incl 0.02 0.03
over 0.75 0.03 0.04
Manganese to 0.90, incl 0.03 0.04
over 0.90 to 2.10, incl 0.04 0.05
Phosphorus over max, only 0.005 0.010
Sulfur to 0.060, incl 0.005 0.010
Silicon to 0.35, incl 0.02 0.02
over 0.35 to 2.20, incl 0.05 0.06
Nickel to 1.00, incl 0.03 0.03
over 1.00 to 2.00, incl 0.05 0.05
over 2.00 to 5.30, incl 0.07 0.07
over 5.30 to 10.00, incl 0.10 0.10
Chromium to 0.90, incl 0.03 0.04
over 0.90 to 2.10, incl 0.05 0.06
over 2.10 to 3.99, incl 0.10 0.10
Molybdenum to 0.20, incl 0.01 0.01
over 0.20 to 0.40, incl 0.02 0.03
over 0.40 to 1.15, incl 0.03 0.04
Vanadium to 0.10, incl 0.01 0.01
over 0.10 to 0.25, incl 0.02 0.02
over 0.25 to 0.50, incl 0.03 0.03
min value specified, check 0.01 0.01
under min limit
Tungsten to 1.00, incl 0.04 0.05
over 1.00 to 4.00, incl 0.08 0.09
Aluminum up to 0.10, incl 0.03 . . .
over 0.10 to 0.20, incl 0.04 . . .
over 0.20 to 0.30, incl 0.05 . . .
over 0.30 to 0.80, incl 0.07 . . .
over 0.80 to 1.80, incl 0.10 . . .
9. Permissible Variations in Dimensions of Round Tubing
9.1 Hot-Finished Mechanical Tubing—Hot-finished mechanical tubing is produced to outside diameter and wall thickness.
A519/A519M − 23
Variations in outside diameter and wall thickness shall not exceed the tolerances shown in Table 6 and Table 7. Table 6 and Table
7 cover these tolerances and apply to the specified size.
9.2 Cold-Worked Mechanical Tubing:
9.2.1 Variations in outside diameter, inside diameter and wall thickness shall not exceed the tolerances shown in Tables 8-10.
9.2.2 Cold-worked mechanical tubing is normally produced to outside diameter and wall thickness. If the inside diameter is a more
important dimension, then cold-worked tubing should be specified to inside diameter and wall thickness or outside diameter and
inside diameter.
9.3 Rough-Turned Mechanical Tubing—Variation in outside diameter and wall thickness shall not exceed the tolerance in Table
11. Table 11 covers tolerances as applied to outside diameter and wall thickness and applies to the specified size.
9.4 Ground Mechanical Tubing—Variation in outside diameter shall not exceed the tolerances in Table 12. This product is
normally produced from a cold-worked tube.
9.5 Lengths—Mechanical tubing is commonly furnished in mill lengths, 5 ft [1.5 m] and over. Definite cut lengths are furnished
when specified by the purchaser. Length tolerances are shown in Table 13.
9.6 Straightness—The straightness tolerances for seamless round tubing shall not exceed the amounts shown in Table 14.
10. Permissible Variations in Dimensions of Square and Rectangular Tubing
10.1 Variations in outside dimensions and wall thickness shall not exceed the tolerances shown in Table 15 unless otherwise
specified by the manufacturer and the purchaser. The wall thickness dimensions shall not apply at the corners.
10.2 Corner Radii—The corners of a square and a rectangular tube will be slightly rounded inside and rounded outside consistent
with the wall thickness. The outside corner may be slightly flattened. The radii of corners for square and rectangular cold finished
tubing shall be in accordance with Table 16.
10.3 Squareness Tolerance:
10.3.1 Permissible variations for squareness for the side of square and rectangular tubing shall be determined by the following
equation:
6b 5 c ×0.006
where:
b = tolerance for out-of-square, in. [mm], and
TABLE 6 Outside Diameter Tolerances for Round Hot-Finished
A,B,C
Tubing
Outside Diameter Size Range, Outside Diameter Tolerance, in. [mm]
in. [mm] Over Under
Up to 2.999 [76.17] 0.020 [0.51] 0.020 [0.51]
3.000–4.499 [76.20–114.27] 0.025 [0.64] 0.025 [0.64]
4.500–5.999 [114.30–152.37] 0.031 [0.79] 0.031 [0.79]
6.000–7.499 [152.40–190.47] 0.037 [0.94] 0.037 [0.94]
7.500–8.999 [190.50–228.57] 0.045 [1.14] 0.045 [1.14]
9.000–10.750 [228.60–273.05] 0.050 [1.27] 0.050 [1.27]
A
Diameter tolerances are not applicable to normalized and tempered or quenched
and tempered conditions.
B 1 3
The common range of sizes of hot finished tubes is 1 ⁄2 in. [38.1 mm] to 10 ⁄4 in.
[273.0 mm] outside diameter with wall thickness at least 3 % or more of outside
diameter, but not less than 0.095 in. [2.41 mm].
C
Larger sizes are available; consult manufacturer for sizes and tolerances.
A519/A519M − 23
TABLE 7 Wall Thickness Tolerances for Round Hot-Finished
Tubing
A
Wall Thickness Wall Thickness Tolerance, percent Over
and Under Nominal
Range as Percent
of Outside
Outside Outside Outside
Diameter
Diameter Diameter Diameter
2.999 in. 3.000 in. 6.000 in.
[76.19 mm] [76.20 mm] [152.40 mm]
and smaller to 5.999 in. to 10.750 in.
[152.37 mm] [273.05 mm]
Under 15 12.5 10.0 10.0
15 and over 10.0 7.5 10.0
A
Wall thickness tolerances may not be applicable to walls 0.199 in. [5.05 mm] and
less; consult manufacturer for wall tolerances on such tube sizes.
c = largest external dimension across flats, in. [mm].
10.3.2 The squareness of sides is commonly determined by one of the following methods:
10.3.2.1 A square, with two adjustable contact points on each arm, is placed on two sides. A fixed feeler gage is then used to
measure the maximum distance between the free contact point and the surface of the tubing.
10.3.2.2 A square, equipped with direct-reading vernier, may be used to determine the angular deviation which in turn may be
related to distance, in inches.
10.4 Twist Tolerance:
10.4.1 Twist tolerance for square and rectangular tubing shall be in accordance with Table 17. The twist tolerance in square and
rectangular tubing may be measured by holding one end of the square or rectangular tube on a surface plate with the bottom side
parallel to the surface plate and noting the height at either corner of the opposite end of the same side above the surface plate.
10.4.2 Twist may also be measured by the use of a beveled protractor, equipped with a level, and noting the angular deviation on
opposite ends or at any point throughout the length.
10.5 Lengths—Square and rectangular tubing is commonly furnished in mill lengths 5 ft [1.5 m] and over. Definite cut lengths are
furnished when specified by the purchaser. Length tolerances are shown in Table 18 and Table 9.
10.6 Straightness—Straightness for square and rectangular tubing shall be 0.060 in. in any 3 ft [1.5 mm in 1 m].
11. Machining Allowances
11.1 For the method of calculating the tube size required to cleanup in machining to a particular finished part, see Appendix X1.
12. Workmanship, Finish, and Appearance
12.1 The tubing shall be free of laps, cracks, seams, and other defects as is consistent with good commercial practice. The surface
finish will be compatible with the condition to which it is ordered.
13. Condition
13.1 The purchaser shall specify a sizing method and, if required, a thermal treatment.
13.1.1 Sizing Methods:
13.1.1.1 HF—Hot Finished,
13.1.1.2 CW—Cold Worked,
A519/A519M − 23
A,B,C
TABLE 8 Outside and Inside Diameter Tolerances for Round Cold-Worked Tubing (Inch Units)
Outside Thermal Treatment after Final Cold Work Producing Size
Diameter
Wall None, or not exceeding Heated Above 1100 °F Nominal Quenched and Tempered
Size Range,
Thickness 1100 °F Nominal Temperature Without
in.
As Percent Temperature Accelerated Cooling
of Outside
OD, in. ID, in. OD, in. ID, in. OD, in. ID, in.
Diameter
Over Under Over Under Over Under Over Under Over Under Over Under
Up to 0.499 all 0.004 0.000 — — 0.005 0.002 — — 0.010 0.010 0.010 0.010
0.500–1.699 all 0.005 0.000 0.000 0.005 0.007 0.002 0.002 0.007 0.015 0.015 0.015 0.015
1.700–2.099 all 0.006 0.000 0.000 0.006 0.006 0.005 0.005 0.006 0.020 0.020 0.020 0.020
2.100–2.499 all 0.007 0.000 0.000 0.007 0.008 0.005 0.005 0.008 0.023 0.023 0.023 0.023
2.500–2.899 all 0.008 0.000 0.000 0.008 0.009 0.005 0.005 0.009 0.025 0.025 0.025 0.025
2.900–3.299 all 0.009 0.000 0.000 0.009 0.011 0.005 0.005 0.011 0.028 0.028 0.028 0.028
3.300–3.699 all 0.010 0.000 0.000 0.010 0.013 0.005 0.005 0.013 0.030 0.030 0.030 0.030
3.700–4.099 all 0.011 0.000 0.000 0.011 0.013 0.007 0.010 0.010 0.033 0.033 0.033 0.033
4.1
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