ASTM A1024/A1024M-18

Standard Specification for Steel Line Pipe, Black, Plain-End, Seamless

ABSTRACT
This specification covers standard requirements for seamless, black, plain-end steel pipes for use in the conveyance of fluids under pressure. A quantity of pipe of the same ordered diameter, heat, wall thickness, and grade shall be given. Heat and product analyses shall be performed wherein steel pipes shall conform to the required chemical composition for carbon, sulfur, and phosphorus. Steel samples shall undergo tension test and shall conform to tensile properties such as yield strength and tensile strength. Hydrostatic pressure test shall be performed for steel samples with specified wall thickness and test pressure. The entire outer surface of the steel pipe shall undergo nondestructive electric test and shall be inspected for longitudinal defects by either magnetic particle inspection, ultrasonic inspection, and electromagnetic inspection.
SCOPE
1.1 This specification covers seamless, black, plain-end steel pipe for use in the conveyance of fluids under pressure. Pipe in sizes NPS 1 to 26, inclusive, as given in ASME B36.10M is included. Pipe having other dimensions, in this size range, may be furnished provided such pipe complies with all other requirements of this specification.  
1.2 It is intended that the pipe be capable of being circumferentially welded in the field when welding procedures in accordance with the requirements of the applicable pipeline construction code are used.  
1.3 The values stated in either inch-pound units or in SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values in each system are not exact equivalents; therefore, each system is to be used independently of the other.  
1.4 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-Oct-2018
• ICS: 23.040.10 - Iron and steel pipes
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.09 - Carbon Steel Tubular Products

Relations

• Replaces: ASTM A1024/A1024M-02(2012) - Standard Specification for Steel Line Pipe, Black, Plain-End, Seamless
• Effective Date: 01-Nov-2018
• 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 A450/A450M-23 - Standard Specification for General Requirements for Carbon and Low Alloy Steel Tubes
• Effective Date: 01-Nov-2023
• Refers: ASTM A370-19 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Jul-2019
• Refers: ASTM A450/A450M-18 - Standard Specification for General Requirements for Carbon and Low Alloy Steel Tubes
• Effective Date: 01-Sep-2018
• Refers: ASTM A370-17a - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 15-Nov-2017
• Refers: ASTM A941-17 - Standard Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
• Effective Date: 01-Sep-2017
• Refers: ASTM A370-17 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Jan-2017
• Refers: ASTM A370-15 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Nov-2015
• Refers: ASTM A941-15 - Standard Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
• Effective Date: 01-Nov-2015
• Refers: ASTM A450/A450M-15 - Standard Specification for General Requirements for Carbon and Low Alloy Steel Tubes
• Effective Date: 01-May-2015
• Refers: ASTM A370-14 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 15-May-2014
• Refers: ASTM A751-14 - Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
• Effective Date: 01-Mar-2014
• Refers: ASTM A370-13 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 15-Nov-2013

Overview

ASTM A1024/A1024M-18 is an international standard specification developed by ASTM International for seamless, black, plain-end steel line pipe. This specification covers the requirements for steel pipes intended for the conveyance of fluids under pressure, ensuring their structural integrity and safety in critical applications. Covering pipe sizes from NPS 1 to 26, as per ASME B36.10M, ASTM A1024/A1024M provides guidance on ordering, manufacturing, chemical composition, mechanical properties, testing, and marking requirements for seamless steel line pipe.

Key Topics

• Product Scope: Seamless, black, plain-end steel pipes for fluid transport under pressure
• Dimensions: Pipe sizes NPS 1 through NPS 26, in accordance with ASME B36.10M
• Chemical Composition: Limits on carbon, sulfur, phosphorus, and boron to ensure material quality
• Mechanical Properties: Yield and tensile strength requirements, ductility, and elongation criteria for each grade
• Testing Methods: Comprehensive testing including:
  • Tension and impact (Charpy V-notch) tests for mechanical properties
  • Hydrostatic pressure tests to verify leak resistance
  • Nondestructive electrical inspection (magnetic particle, ultrasonic, or electromagnetic) for detection of longitudinal defects
• Manufacturing Requirements: Seamless production; heat treatment options dependent on purchase order
• Quality Assurance: Marking, traceability via heat numbers, and documentation requirements to ensure compliance and identification

Applications

The seamless steel line pipe specified in ASTM A1024/A1024M is widely used in industries where robust and reliable fluid conveyance is critical, such as:

• Oil and Gas Pipelines: For transporting crude oil, natural gas, and petroleum products under high pressure
• Petrochemical Facilities: Reliable transfer of feedstocks and chemicals
• Industrial Pressure Piping: Water, steam, or other fluids in power generation, refineries, and chemical plants
• Field Construction: The specification ensures weldability for circumferential welding in accordance with pipeline construction codes
• Infrastructure Projects: Municipal water or wastewater systems requiring high-strength, seamless pipe

Related Standards

To ensure maximum compatibility and compliance, ASTM A1024/A1024M references several key standards that address general requirements, testing, and terminology:

• ASME B36.10M: Dimensions for welded and seamless wrought steel pipe
• ASTM A370: Mechanical testing methods for steel products
• ASTM A450/A450M: General requirements for carbon and low alloy steel tubes
• ASTM A530/A530M: Specialized requirements for carbon and alloy steel pipe
• ASTM A751: Methods for chemical analysis of steel products
• ASTM A941: Terminology for steel, stainless steel, and related alloys
• API RP 5L3: Drop-weight tear tests on line pipe (for evaluating ductile fracture)

Practical Value

Implementing ASTM A1024/A1024M-compliant seamless black steel pipes ensures high performance and durability in demanding pipeline environments. The specification's robust requirements for chemical composition, mechanical strength, and extensive quality tests minimize the risk of failure, leakage, or premature wear. This standard supports procurement, quality control, and regulatory compliance efforts for engineers, project managers, and procurement specialists in the energy, water, and industrial sectors.

Keywords: ASTM A1024, seamless steel pipe, black line pipe, pressure piping, pipeline standards, hydrostatic test, non-destructive inspection, oil and gas pipe, mechanical testing, ASME B36.10M.

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:A1024/A1024M −18
Standard Specification for
Steel Line Pipe, Black, Plain-End, Seamless
This standard is issued under the fixed designation A1024/A1024M; 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* A941TerminologyRelatingtoSteel,StainlessSteel,Related
Alloys, and Ferroalloys
1.1 This specification covers seamless, black, plain-end
2.2 API Standard:
steel pipe for use in the conveyance of fluids under pressure.
API RP 5L3Recommended Practice for Conducting Drop-
Pipe in sizes NPS 1 to 26, inclusive, as given in ASME
Weight Tear Tests on Line Pipe
B36.10M is included. Pipe having other dimensions, in this
2.3 ASME Standard:
sizerange,maybefurnishedprovidedsuchpipecomplieswith
ASME B36.10MWelded and SeamlessWrought Steel Pipe
all other requirements of this specification.
1.2 It is intended that the pipe be capable of being circum-
3. Terminology
ferentially welded in the field when welding procedures in
3.1 Definitions—For terminology used in this specification,
accordance with the requirements of the applicable pipeline
refer to Terminology A941.
construction code are used.
3.2 Definitions of Terms Specific to This Standard:
1.3 The values stated in either inch-pound units or in SI
3.2.1 lot, n—a quantity of pipe of the same ordered
units are to be regarded separately as standard.Within the text,
diameter, heat, wall thickness, and grade as given in Table 1.
the SI units are shown in brackets. The values in each system
3.2.2 seamless pipe, n—a tubular product made without a
are not exact equivalents; therefore, each system is to be used
welded seam; it is manufactured usually by hot working the
independently of the other.
material, and if necessary, by subsequently cold-finishing the
1.4 This international standard was developed in accor-
hot worked tubular product to produce the desired shape,
dance with internationally recognized principles on standard-
dimensions, and properties.
ization established in the Decision on Principles for the
3.2.3 specified outside diameter (OD), n—the outside diam-
Development of International Standards, Guides and Recom-
eter specified in the purchase order or the outside diameter
mendations issued by the World Trade Organization Technical
listedinASMEB36.10Mforthenominalpipesizespecifiedin
Barriers to Trade (TBT) Committee.
the purchase order.
2. Referenced Documents
4. General Requirements
2.1 ASTM Standards:
4.1 Pipe furnished under this specification shall conform to
A370Test Methods and Definitions for Mechanical Testing
the applicable requirements of Specification A530/A530M
of Steel Products
unless otherwise provided herein.
A450/A450MSpecification for General Requirements for
Carbon and Low Alloy Steel Tubes
5. Ordering Information
A530/A530MSpecification for General Requirements for
Specialized Carbon and Alloy Steel Pipe
5.1 Information items to be considered, if appropriate, for
A751Test Methods, Practices, and Terminology for Chemi- inclusion in the purchase order are as follows:
cal Analysis of Steel Products
5.1.1 Specification designation and year of issue,
5.1.2 Quantity (feet or metres),
5.1.3 Grade (see Table 2 and 8.1.5),
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
5.1.4 Size (either nominal (NPS) or outside diameter and
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
wall thickness),
A01.09 on Carbon Steel Tubular Products.
Current edition approved Nov. 1, 2018. Published November 2018. Originally
approved in 2002. Last previous edition approved in 2012 as A1024/A1024M–02
(2012). DOI: 10.1520/A1024_A1024M-18. Available from American Petroleum Institute (API), 1220 L. St., NW,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Washington, DC 20005-4070, http://api-ec.api.org.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Available from American Society of Mechanical Engineers (ASME), ASME
Standards volume information, refer to the standard’s Document Summary page on International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
the ASTM website. www.asme.org.
*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
A1024/A1024M−18
TABLE 1 Lot Size and Sample Size for Mechanical and
5.1.13 Bar coding (see 18.3).
Toughness Testing
Pipe Size Lot Size Sample Size
6. Manufacture
6.1 Pipe shall be manufactured by the seamless process.
NPS 2 through NPS 5 400 lengths 1
NPS 6 through NPS 12 200 lengths 1
Unless a specific heat treatment condition is specified in the
>NPS 12 100 lengths 1
purchase order, pipe shall be furnished in the as-rolled,
normalized, normalized and tempered, or quenched and tem-
pered condition.
TABLE 2 Tensile Requirements
A
Grade Yield Strength, Tensile Strength,
Yield Strength,
7. Chemical Composition
Max.
Min. Min.
psi MPa psi MPa psi MPa
7.1 The steel for any grade, by heat and product analyses,
35 35 000 240 65 000 450 60 000 415
shall contain no more than 0.24% carbon, 0.015% sulfur, and
50 50 000 345 77 000 530 70 000 485
0.025% phosphorus.
60 60 000 415 80 000 550 75 000 515
70 70 000 485 87 000 600 80 000 550
7.2 Thesteelshallcontainnomorethan0.0007%boron,by
80 80 000 550 97 000 670 90 000 620
heat analysis.
A
See 8.1.1.
7.3 For pipe with a specified wall thickness less than or
equal to 0.800 in. [20.3 mm], the carbon equivalent (CE) shall
TABLE 3 Hydrostatic Test Pressure not exceed 0.43%, calculated from the product analysis using
the following equation:
Specified Wall Test Pressure,
NPS Specified OD
Thickness Min.
Designator in. [mm]
CE 5 C1F Mn/61Si/241Cu/151Ni/201 Cr1Mo1V1Nb /5
@ ~ ! #
in. [mm] psi [kPa]
(1)
1 1.315 [33.4] 0.133 [3.4] 700 [4800]
0.179 [4.6] 850 [5900]
where:
0.250 [6.4] 950 [6600]
0.358 [9.1] 1000 [6900]
F = a compliance factor that is dependent on the carbon
1 ⁄4 1.660 [42.2] 0.140 [3.6] 1300 [9000]
content as shown below:
0.191 [4.9] 1900 [13 100]
0.250 [6.4] 2000 [13 800]
Carbon Carbon
F F
0.382 [9.7] 2300 [15 900]
Content, % Content, %
1 ⁄2 1.900 [48.3] 0.145 [3.7] 1300 [9000]
<0.06 0.53 0.15 0.88
0.200 [5.1] 1900 [13 100]
0.06 0.54 0.16 0.92
0.281 [7.1] 2000 [13 800]
0.07 0.56 0.17 0.94
0.400 [10.2] 2300 [15 900]
0.08 0.58 0.18 0.96
0.09 0.62 0.19 0.97
0.10 0.66 0.20 0.98
0.11 0.70 0.21 0.99
TABLE 4 Acceptance Limits
0.12 0.75 >0.21 1.00
Acceptance Limit 0.13 0.80
Type of Notch
Signal, % 0.14 0.85
Parallel Sided Notch 100
NOTE 1—Element 41 has been identified as columbium or niobium.
Drilled Hole 100
A01 considers them interchangeable and both acceptable. Subcommittee
A01.09 has chosen to use niobium.
7.4 For pipe with a specified wall thickness greater than
5.1.5 Nominal length (see 14.3),
0.800 in. [20.3 mm], the carbon equivalent (CE) shall be as
5.1.6 End finish (plain-end beveled or special, see 15.1),
specified in the purchase order.
5.1.7 Impact test temperature (see 8.2.5),
7.5 A heat analysis shall be made for each heat of steel
5.1.8 Heat treatment condition (see 6.1),
furnished under this specification. All pipe shall be marked
5.1.9 Carbon equivalent for over 0.800 in. [20.3 mm] wall
witheitheraheatnumberorheatcodeinaccordancewith18.1
thicknesses (see 7.4),
and 18.2.
5.1.10 Reduced under thickness variation (see Table 5),
5.1.11 Special requirements,
7.6 Product analyses shall be made on at least two samples
5.1.12 Supplementary requirements, and
from each heat of steel.
7.7 All analyses shall be in accordance with Test Methods,
TABLE 5 Permissible Variations in Wall Thickness Practices, and Terminology A751, and shall include all ele-
ments required in the carbon equivalent equation of 7.3,in
Permissible Variations from
A
NPS Designator Specified Wall Thickness, %
additiontotitanium,phosphorus,sulfur,andboron,exceptthat
Over Under
the product analysis for boron is not required. Titanium is
1to2 ⁄2, incl. 20.0 10.0
reported for information only and is not a cause for rejection.
3 and larger 15.0 10.0
A
If a reduced under thickness variation is specified in the purchase order, it is
7.8 Ifoneorbothoftheproductanalysesrepresentingaheat
permissible for the over thickness variation to be increased, provided that the
fail to conform to the specified requirements, the heat shall be
applicable total tolerance range in percent is not increased.
rejected, or analyses shall be made on double the original
A1024/A1024M−18
numberoftestsamplesthatfailed,eachofwhichshallconform tobeobtained,thereisnorequirementforimpacttesting.Inall
to the specified requirements. cases, the largest possible test specimen size shall be used,
except where such a test specimen size will result in absorbed
8. Mechanical Properties energy values greater than 80% of the testing machine
capacity.
8.1 Tension Test:
8.2.3 When subsize test specimens are used, the require-
8.1.1 The material shall conform to the tensile requirements
ments for absorbed energy shall be the adjusted values ob-
given in Table 2 and 8.1.6. The yield strength maxima apply
tained by the following relationships, with the calculated
only to pipe NPS 8 and larger.
values rounded to the nearest foot pound-force [joule]:
8.1.2 The yield strength corresponding to a total extension
For2/3 size:N 5 R 30.67 (3)
under load of 0.5% of the gage length shall be determined.
8.1.3 Transverse tension tests shall be performed on pipe
For1/2 size:N 5 R 30.50
NPS 8 and larger, or longitudinal, subject to approval by
purchaser. Transverse test specimens shall be either strip test
where:
specimens or round bar test specimens, at the option of the
N = adjusted value, ft·lbf [J], and
manufacturer. All transverse strip test specimens shall be
R = value required by 8.2.4.
approximately 1 ⁄2 in. [38 mm] wide in the gage length and
8.2.4 For pipe NPS 5 through NPS 26, the absorbed energy
each shall represent the full wall thickness of the pipe from
requirementforfullsizetestspecimensshallbe20ft·lbf[27J].
which the test specimen was cut.
For pipe smaller than NPS 5, the absorbed energy requirement
8.1.4 Longitudinal tension tests shall be performed on pipe
for full size test specimens shall be 30 ft·lbf [40 J].
smallerthanNPS8.Longitudinaltestspecimensshallbeeither
8.2.5 Charpy impact testing shall be performed at 32°F
strip test specimens, full-size test specimens, or round bar test
[0°C], unless a lower test temperature is specified in the
specimens, at the option of the manufacturer.
purchase order.
8.1.5 Grades intermediate to those given in Table 2 shall be
furnishedifsospecifiedinthepurchaseorder.Forintermediate
9. Hydrostatic Test
grades, the difference between the specified maximum yield
strength and the specified minimum yield strength and the
9.1 Each length of pipe shall be subjected to the hydrostatic
difference between the specified minimum tensile strength and
test without leakage through the wall.
thespecifiedminimumyieldstrengthshallbeasgiveninTable
9.2 Each length of pipe NPS 2 or larger shall be tested, by
2 for the next higher listed grade.
the manufacturer, to a minimum hydrostatic pressure calcu-
8.1.6 For each grade, the minimum elongation in 2 in. [50
lated from the following relationship:
mm] shall be as determined by the following equation:
Inch 2 PoundUnits:P 5 2 St/D 3C (4)
~ !
0.2 0.9
e 5 C ~A /U ! (2)
SIUnits:P 5 2000 ~St/D! 3C
where:
e = minimum elongation in percent, rounded to the nearest
where:
percent,
S = specified minimum yield strength, psi [MPa],
C = constant=625000 [1940],
t = specified wall thickness, in. [mm],
2 2
A = the lesser of 0.75 in. [485 mm ] and the cross-
D = specified outside diameter, in. [mm],
sectional area of the tension test specimen in in.
C = 0.60 for pipe NPS 2 through NPS 5,
[mm ], based upon the specified outside diameter of
0.75 for pipe larger than NPS 5 through NPS 8,
the pipe or the nominal width of the tension test
0.85 for pipe larger than NPS 8 through NPS 18,
specimen and the specified wall thickness, rounded to
0.90 for pipe larger than NPS 18, and
2 2
the nearest 0.01 in. [1 mm ],
P = minimum hydrostatic test pressure, psi [kPa].
U = specified minimum tensile strength, psi [MPa].
9.3 For pipe sizes smaller than NPS 2, the test pressures
8.2 Impact Test:
given in Table 3 are arbitrary. For pipe in sizes smaller than
8.2.1 Except as allowed by 8.2.2, pipe shall be Charpy
NPS 2 with specified wall thicknesses lighter than those listed,
V-notch tested in accordance with Test Methods and Defini-
the test pressure for the next heavier listed specified wall
tions A370. For pipe smaller than NPS 5, such test specimens
thickness shall be used. For intermediate specified outside
shallbetakenlongitudinaltothepipeaxis.ForpipeNPS5and
diameters for pipe sizes smaller than NPS 2, the test pressures
larger, the test specimens shall be taken transvers
...

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: A1024/A1024M − 02 (Reapproved 2012) A1024/A1024M − 18
Standard Specification for
Steel Line Pipe, Black, Plain-End, Seamless
This standard is issued under the fixed designation A1024/A1024M; 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 Scope*
1.1 This specification covers seamless, black, plain-end steel pipe for use in the conveyance of fluids under pressure. Pipe in
sizes NPS 1 to 26, inclusive, as given in ASME B36.10M is included. Pipe having other dimensions, in this size range, may be
furnished provided such pipe complies with all other requirements of this specification.
1.2 It is intended that the pipe be capable of being circumferentially welded in the field when welding procedures in accordance
with the requirements of the applicable pipeline construction code are used.
1.3 The values stated in either inch-pound units or in SI units are to be regarded separately as standard. Within the text, the SI
units are shown in brackets. The values in each system are not exact equivalents; therefore, each system is to be used independently
of the other.
1.4 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
A450/A450M Specification for General Requirements for Carbon and Low Alloy Steel Tubes
A530/A530M Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
2.2 API Standard:
API RP 5L3 Recommended Practice for Conducting Drop-Weight Tear Tests on Line Pipe
2.3 ASME Standard:
ASME B36.10M Welded and Seamless Wrought Steel Pipe
3. Terminology
3.1 Definitions—For terminology used in this specification, refer to Terminology A941.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 lot, n—a quantity of pipe of the same ordered diameter, heat, wall thickness, and grade as given in Table 1.
3.2.2 seamless pipe, n—a tubular product made without a welded seam; it is manufactured usually by hot working the material,
and if necessary, by subsequently cold-finishing the hot worked tubular product to produce the desired shape, dimensions, and
properties.
3.2.3 specified outside diameter (OD), n—the outside diameter specified in the purchase order or the outside diameter listed in
ASME B36.10M for the nominal pipe size specified in the purchase order.
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 Sept. 1, 2012Nov. 1, 2018. Published November 2012November 2018. Originally approved in 2002. Last previous edition approved in 20072012
as A1024/A1024M – 02 (2012).(2007), DOI: 10.1520/A1024_A1024M-02R12.10.1520/A1024_A1024M-18.
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.
Available from American Petroleum Institute (API), 1220 L. St., NW, Washington, DC 20005-4070, http://api-ec.api.org.
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, ThreeTwo Park Ave., New York, NY 10016-5990,
http://www.asme.org.
*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
A1024/A1024M − 18
TABLE 1 Lot Size and Sample Size for Mechanical and
Toughness Testing
Pipe Size Lot Size Sample Size
NPS 2 through NPS 5 400 lengths 1
NPS 6 through NPS 12 200 lengths 1
>NPS 12 100 lengths 1
4. General Requirements
4.1 Pipe furnished under this specification shall conform to the applicable requirements of Specification A530/A530M unless
otherwise provided herein.
5. Ordering Information
5.1 Information items to be considered, if appropriate, for inclusion in the purchase order are as follows:
5.1.1 Specification designation and year of issue,
5.1.2 Quantity (feet or metres),
5.1.3 Grade (see Table 2 and 8.1.5),
5.1.4 Size (either nominal (NPS) or outside diameter and wall thickness),
5.1.5 Nominal length (see 14.3),
5.1.6 End finish (plain-end beveled or special, see 15.1),
5.1.7 Impact test temperature (see 8.2.5),
5.1.8 Heat treatment condition (see 6.1),
5.1.9 Carbon equivalent for over 0.800 in. [20.3 mm] wall thicknesses (see 7.4),
5.1.10 Reduced under thickness variation (see Table 5),
5.1.11 Special requirements,
5.1.12 Supplementary requirements, and
5.1.13 Bar coding (see 18.3).
6. Manufacture
6.1 Pipe shall be manufactured by the seamless process. Unless a specific heat treatment condition is specified in the purchase
order, pipe shall be furnished in the as-rolled, normalized, normalized and tempered, or quenched and tempered condition.
7. Chemical Composition
7.1 The steel for any grade, by heat and product analyses, shall contain no more than 0.24 % carbon, 0.015 % sulfur, and
0.025 % phosphorus.
7.2 The steel shall contain no more than 0.0007 % boron, by heat analysis.
7.3 For pipe with a specified wall thickness less than or equal to 0.800 in. [20.3 mm], the carbon equivalent (CE) shall not
exceed 0.43 %, calculated from the product analysis using the following equation:
CE 5 C1F Mn/61Si/241Cu/151Ni/201 Cr1Mo1V1Cb /5 (1)
@ ~ ! #
CE 5 C1F Mn/61Si/241Cu/151Ni/201 Cr1Mo1V1Nb /5 (1)
@ ~ ! #
where:
F = a compliance factor that is dependent on the carbon content as shown below:
Carbon Carbon
F F
Content, % Content, %
<0.06 0.53 0.15 0.88
TABLE 2 Tensile Requirements
A
Grade Yield Strength, Tensile Strength,
Yield Strength,
Max.
Min. Min.
psi MPa psi MPa psi MPa
35 35 000 240 65 000 450 60 000 415
50 50 000 345 77 000 530 70 000 485
60 60 000 415 80 000 550 75 000 515
70 70 000 485 87 000 600 80 000 550
80 80 000 550 97 000 670 90 000 620
A
See 8.1.1.
A1024/A1024M − 18
TABLE 3 Hydrostatic Test Pressure
Specified Wall Test Pressure,
NPS Specified OD
Thickness Min.
Designator in. [mm]
in. [mm] psi [kPa]
1 1.315 [33.4] 0.133 [3.4] 700 [4800]
0.179 [4.6] 850 [5900]
0.250 [6.4] 950 [6600]
0.358 [9.1] 1000 [6900]
1 ⁄4 1.660 [42.2] 0.140 [3.6] 1300 [9000]
0.191 [4.9] 1900 [13 100]
0.250 [6.4] 2000 [13 800]
0.382 [9.7] 2300 [15 900]
1 ⁄2 1.900 [48.3] 0.145 [3.7] 1300 [9000]
0.200 [5.1] 1900 [13 100]
0.281 [7.1] 2000 [13 800]
0.400 [10.2] 2300 [15 900]
TABLE 4 Acceptance Limits
Acceptance Limit
Type of Notch
Signal, %
Parallel Sided Notch 100
Drilled Hole 100
TABLE 5 Permissible Variations in Wall Thickness
Permissible Variations from
A
NPS Designator Specified Wall Thickness, %
Over Under
1 to 2 ⁄2, incl. 20.0 10.0
3 and larger 15.0 10.0
A
If a reduced under thickness variation is specified in the purchase order, it is
permissible for the over thickness variation to be increased, provided that the
applicable total tolerance range in percent is not increased.
0.06 0.54 0.16 0.92
0.07 0.56 0.17 0.94
0.08 0.58 0.18 0.96
0.09 0.62 0.19 0.97
0.10 0.66 0.20 0.98
0.11 0.70 0.21 0.99
0.12 0.75 >0.21 1.00
0.13 0.80
0.14 0.85
NOTE 1—Element 41 has been identified as columbium or niobium. A01 considers them interchangeable and both acceptable. Subcommittee A01.09
has chosen to use niobium.
7.4 For pipe with a specified wall thickness greater than 0.800 in. [20.3 mm], the carbon equivalent (CE) shall be as specified
in the purchase order.
7.5 A heat analysis shall be made for each heat of steel furnished under this specification. All pipe shall be marked with either
a heat number or heat code in accordance with 18.1 and 18.2.
7.6 Product analyses shall be made on at least two samples from each heat of steel.
7.7 All analyses shall be in accordance with Test Methods, Practices, and Terminology A751, and shall include all elements
required in the carbon equivalent equation of 7.3, in addition to titanium, phosphorus, sulfur, and boron, except that the product
analysis for boron is not required. Titanium is reported for information only and is not a cause for rejection.
7.8 If one or both of the product analyses representing a heat fail to conform to the specified requirements, the heat shall be
rejected, or analyses shall be made on double the original number of test samples that failed, each of which shall conform to the
specified requirements.
8. Mechanical Properties
8.1 Tension Test:
8.1.1 The material shall conform to the tensile requirements given in Table 2 and 8.1.6. The yield strength maxima apply only
to pipe NPS 8 and larger.
8.1.2 The yield strength corresponding to a total extension under load of 0.5 % of the gage length shall be determined.
A1024/A1024M − 18
8.1.3 Transverse tension tests shall be performed on pipe NPS 8 and larger, or longitudinal, subject to approval by purchaser.
Transverse test specimens shall be either strip test specimens or round bar test specimens, at the option of the manufacturer. All
transverse strip test specimens shall be approximately 1 ⁄2 in. [38 mm] wide in the gage length and each shall represent the full
wall thickness of the pipe from which the test specimen was cut.
8.1.4 Longitudinal tension tests shall be performed on pipe smaller than NPS 8. Longitudinal test specimens shall be either strip
test specimens, full-size test specimens, or round bar test specimens, at the option of the manufacturer.
8.1.5 Grades intermediate to those given in Table 2 shall be furnished if so specified in the purchase order. For intermediate
grades, the difference between the specified maximum yield strength and the specified minimum yield strength and the difference
between the specified minimum tensile strength and the specified minimum yield strength shall be as given in Table 2 for the next
higher listed grade.
8.1.6 For each grade, the minimum elongation in 2 in. [50 mm] shall be as determined by the following equation:
0.2 0.9
e 5 C ~A /U ! (2)
where:
e = minimum elongation in percent, rounded to the nearest percent,
C = constant = 625 000 [1940],
2 2 2 2
A = the lesser of 0.75 in. [485 mm ] and the cross-sectional area of the tension test specimen in in. [mm ], based upon the
specified outside diameter of the pipe or the nominal width of the tension test specimen and the specified wall thickness,
2 2
rounded to the nearest 0.01 in. [1 mm ],
U = specified minimum tensile strength, psi [MPa].
8.2 Impact Test:
8.2.1 Except as allowed by 8.2.2, pipe shall be Charpy V-notch tested in accordance with Test Methods and Definitions A370.
For pipe smaller than NPS 5, such test specimens shall be taken longitudinal to the pipe axis. For pipe NPS 5 and larger, the test
specimens shall be taken transverse to the pipe axis.
8.2.2 The basic test specimen is full size Charpy V-notch. Where full size test specimens, either conventional or containing the
original OD surface, cannot be obtained due to a combination of specified outside diameter and specified wall thickness, two-thirds
size or half-size test specimens shall be used. Where combinations of specified outside diameter and specified wall thickness do
not permit half-size test specimens to be obtained, there is no requirement for impact testing. In all cases, the largest possible test
specimen size shall be used, except where such a test specimen size will result in absorbed energy values greater than 80 % of the
testing machine capacity.
8.2.3 When subsize test specimens are used, the requirements for absorbed energy shall be the adjusted values obtained by the
following relationships, with the calculated values rounded to the nearest foot pound-force [joule]:
For 2/3 size:N 5 R 30.67 (3)
For 1/2 size:N 5 R 30.50
where:
N = adjusted value, ft·lbf [J], and
R = value required by 8.2.4.
8.2.4 For pipe NPS 5 through NPS 26, the absorbed energy requirement for full size test specimens shall be 20 ft·lbf [27 J].
For pipe smaller than NPS 5, the absorbed energy requirement for full size test specimens shall be 30 ft·lbf [40 J].
8.2.5 Charpy impact testing shall be performed at 32°F [0°C], unless a lower test temperature is specified in the purchase order.
9. Hydrostatic Test
9.1 Each length of pipe shall be subjected to the hydrostatic test without leakage through the wall.
9.2 Each length of pipe NPS 2 or larger shall be tested, by the manufacturer, to a minimum hydrostatic pressure calculated from
the following relationship:
Inch 2 Pound Units:P 5 2 ~St/D! 3C (4)
SI Units:P 5 2000 St/D 3C
~ !
where:
S = specified minimum yield strength, psi [MPa],
t = specified wall thickness, in. [mm],
D = specified outside diameter, in. [mm],
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