ASTM A671/A671M-20

Standard Specification for Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures

ABSTRACT
This specification covers standard requirements for electric-fusion-welded steel pipe with filler metal added, for atmospheric and lower temperatures. The steel pipe shall be fabricated from a pressure vessel quality plate of several analysis and strength levels. Several grades and classes of pipe shall be provided. Grade shall designate the type of plate used while class shall designate the type of heat treatment performed during pipe manufacture. Class shall be designated as to whether the weld is radiographically examined, and as to whether the pipe is pressure tested. Steel samples shall undergo tension and transverse guided weld bend tests and conform to the specified mechanical requirements.
SCOPE
1.1 This specification2 covers electric-fusion-welded steel pipe with filler metal added, fabricated from pressure vessel quality plate of several analyses and strength levels and suitable for high-pressure service at atmospheric and lower temperatures. Heat treatment may or may not be required to attain the desired properties or to comply with applicable code requirements. Supplementary requirements are provided for use when additional testing or examination is desired.  
1.2 The specification nominally covers pipe 16 in. [400 mm] in outside diameter or larger and of 1/4 in. [6 mm] wall thickness or greater. Pipe having other dimensions may be furnished provided it complies with all other requirements of this specification.  
1.3 Several grades and classes of pipe are provided.  
1.3.1 Grade designates the type of plate used as listed in 5.1.  
1.3.2 Class designates the type of heat treatment performed during manufacture of the pipe, whether the weld is radiographically examined, and whether the pipe has been pressure tested as listed in 1.3.3.  
1.3.3 Class designations are as follows (Note 1):    
Class  
Heat Treatment on Pipe  
Radiography, see Section  
Pressure Test, see:  
10  
none  
none  
none  
11  
none  
9  
none  
12  
none  
9  
8.3  
13  
none  
none  
8.3  
20  
stress relieved, see 5.3.1  
none  
none  
21  
stress relieved, see 5.3.1  
9  
none  
22  
stress relieved, see 5.3.1  
9  
8.3  
23  
stress relieved, see 5.3.1  
none  
8.3  
30  
normalized, see 5.3.2  
none  
none  
31  
normalized, see 5.3.2  
9  
none  
32  
normalized, see 5.3.2  
9  
8.3  
33  
normalized, see 5.3.2  
none  
8.3  
40  
normalized and tempered, see 5.3.3  
none  
none    
41  
normalized and tempered, see 5.3.3  
9  
none  
42  
normalized and tempered, see 5.3.3  
9  
8.3  
43  
normalized and tempered, see 5.3.3  
none  
8.3    
50  
quenched and tempered, see 5.3.4  
none  
none  
51  
quenched and tempered, see 5.3.4  
9  
none  
52  
quenched and tempered, see 5.3.4  
9  
8.3    
53  
quenched and tempered, see 5.3.4  
none  
8.3  
70  
quenched and precipitation heat treated  
none  
none    
71  
quenched and precipitation heat treated  
9  
none    
72  
quenched and precipitation heat treated  
9  
8.3    
73  
quenched and precipitation heat treated  
none  
8.3  
Note 1: Selection of materials should be made with attention to temperature of service. For such guidance, Specification A20/A20M may be consulted.  
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. 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.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles...

General Information

• Status: Published
• Publication Date: 29-Feb-2020
• 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 A671/A671M-19 - Standard Specification for Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures
• Effective Date: 01-Mar-2020
• Refers: ASTM A370-24 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Mar-2024
• Refers: ASTM A577/A577M-17(2023) - Standard Specification for Ultrasonic Angle-Beam Examination of Steel Plates
• Effective Date: 01-Nov-2023
• Refers: ASTM A578/A578M-17(2023) - Standard Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications
• Effective Date: 01-Nov-2023
• Refers: ASTM A517/A517M-17(2023) - Standard Specification for Pressure Vessel Plates, Alloy Steel, High-Strength, Quenched and Tempered
• Effective Date: 01-Nov-2023
• Refers: ASTM A435/A435M-17(2023) - Standard Specification for Straight-Beam Ultrasonic Examination of Steel Plates
• Effective Date: 01-Nov-2023
• Refers: ASTM A537/A537M-20 - Standard Specification for Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel
• Effective Date: 01-May-2020
• Refers: ASTM A370-19 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 01-Jul-2019
• Refers: ASTM A537/A537M-13(2019) - Standard Specification for Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel
• Effective Date: 01-Mar-2019
• Refers: ASTM A20/A20M-18 - Standard Specification for General Requirements for Steel Plates for Pressure Vessels
• Effective Date: 01-Mar-2018
• Refers: ASTM A370-17a - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
• Effective Date: 15-Nov-2017
• Refers: ASTM A20/A20M-17 - Standard Specification for General Requirements for Steel Plates for Pressure Vessels
• Effective Date: 15-Nov-2017
• Refers: ASTM A553/A553M-17 - Standard Specification for Pressure Vessel Plates, Alloy Steel, Quenched and Tempered 7, 8, and 9 % Nickel
• Effective Date: 01-Nov-2017
• Refers: ASTM A736/A736M-17 - Standard Specification for Pressure Vessel Plates, Low-Carbon Age-Hardening Nickel-Copper-Chromium-Molybdenum-Columbium (Niobium) Alloy Steel
• Effective Date: 01-Nov-2017
• Refers: ASTM A578/A578M-17 - Standard Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications
• Effective Date: 01-Nov-2017

Overview

ASTM A671/A671M-20 is the established international standard for electric-fusion-welded steel pipe designed for use at atmospheric and lower temperatures. Developed by ASTM International, this specification outlines the essential requirements for the fabrication, testing, and acceptance of large-diameter welded steel pipes manufactured using pressure vessel quality plate. The standard ensures that pipes are suitable for high-pressure service in environments where temperature control and reliability are critical.

Engineers, pipe fabricators, and procurement specialists worldwide rely on ASTM A671/A671M-20 to specify products that adhere to high standards of safety, quality, and performance for applications such as oil and gas transmission, power generation, and other industrial uses.

---

Key Topics

• Pipe Types and Sizes

  • Covers welded pipe with filler metal added
  • Typically for pipes 16 inches (400 mm) or larger and with wall thickness of at least 1/4 inch (6 mm)
  • Includes different grades and classes based on plate material and heat treatment

• Material and Manufacture

  • Pipes fabricated from pressure vessel quality steel plates of various analyses and strength levels
  • Welding must be performed by qualified procedures and operators
  • Double-welded, full-penetration welds are standard

• Grades and Classes

  • Grade: Designates the steel plate type per its chemical and mechanical properties
  • Class: Indicates the type of heat treatment (none, stress relieved, normalized, normalized and tempered, quenched and tempered, quenched and precipitation heat treated), radiographic examination, and pressure testing

• Mechanical Testing and Quality Control

  • Mandatory tension tests and transverse guided weld bend tests for each production lot
  • Optional supplementary requirements for enhanced mechanical and non-destructive testing (e.g., radiography, ultrasonic, magnetic particle, or liquid penetrant inspections)
  • Hydrostatic pressure testing for designated classes

• Dimensional and Marking Requirements

  • Tolerances for outside diameter, wall thickness, alignment, and length
  • Product marking includes grade and class, with barcoding as a supplemental identification option

---

Applications

Electric-fusion-welded steel pipes conforming to ASTM A671/A671M-20 are used in critical infrastructure and industrial systems where high-pressure service and low-temperature resilience are essential. Typical applications include:

• Oil and Gas Transmission: Suitable for transporting hydrocarbons and other fluids at varying temperatures.
• Power Generation: Utilized in steam and cooling water systems, especially where pressure vessel quality is necessary.
• Chemical and Petrochemical Plants: Ideal for process piping that must withstand both atmospheric and sub-ambient conditions.
• Pipeline Construction: Used in the creation of large-diameter pipelines for regional or intercontinental energy delivery.
• Water and Wastewater Facilities: Applied in high-pressure conduits where durability and compliance are required.

The specification allows tailoring pipe selection to the specific grade and class needed, optimizing safety and performance for the intended environment.

---

Related Standards

Adherence to ASTM A671/A671M-20 may also require consideration or reference to related standards, including:

• ASTM A20/A20M: General requirements for steel plates used in pressure vessels
• ASTM A370: Test methods and definitions for mechanical testing of steel products
• ASTM A530/A530M: General requirements for specialized carbon and alloy steel pipe
• ASTM A516/A516M: Pressure vessel plates, carbon steel, for moderate and lower-temperature service
• ASME Boiler and Pressure Vessel Code: Relevant sections for fabrication, weld inspection, and testing
• ASTM E709, E165/E165M: Guides for magnetic particle and liquid penetrant examination

---

ASTM A671/A671M-20 provides a robust framework for specifying and verifying electric-fusion-welded steel pipe used in demanding, high-pressure, and lower temperature industrial applications, reinforcing safety and reliability across global piping systems.

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:A671/A671M −20
Standard Specification for
Electric-Fusion-Welded Steel Pipe for Atmospheric and
Lower Temperatures
This standard is issued under the fixed designationA671/A671M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
41 normalized and tempered, see 5.3.3 9 none
42 normalized and tempered, see 5.3.3 9 8.3
1.1 This specification covers electric-fusion-welded steel
43 normalized and tempered, see 5.3.3 none 8.3
pipe with filler metal added, fabricated from pressure vessel 50 quenched and tempered, see 5.3.4 none none
51 quenched and tempered, see 5.3.4 9 none
quality plate of several analyses and strength levels and
52 quenched and tempered, see 5.3.4 9 8.3
suitable for high-pressure service at atmospheric and lower
53 quenched and tempered, see 5.3.4 none 8.3
temperatures. Heat treatment may or may not be required to 70 quenched and precipitation heat none none
treated
attain the desired properties or to comply with applicable code
71 quenched and precipitation heat 9 none
requirements. Supplementary requirements are provided for
treated
72 quenched and precipitation heat98.3
use when additional testing or examination is desired.
treated
1.2 The specification nominally covers pipe 16 in. [400
73 quenched and precipitation heat none 8.3
treated
mm] in outside diameter or larger and of ⁄4 in. [6 mm] wall
thickness or greater. Pipe having other dimensions may be
NOTE 1—Selection of materials should be made with attention to
temperature of service. For such guidance, Specification A20/A20M may
furnished provided it complies with all other requirements of
be consulted.
this specification.
1.4 The values stated in either SI units or inch-pound units
1.3 Several grades and classes of pipe are provided.
are to be regarded separately as standard. Within the text, the
1.3.1 Gradedesignatesthetypeofplateusedaslistedin5.1.
SI units are shown in brackets. The values stated in each
1.3.2 Class designates the type of heat treatment performed
system may not be exact equivalents; therefore, each system
during manufacture of the pipe, whether the weld is radio-
shall be used independently of the other. Combining values
graphically examined, and whether the pipe has been pressure
from the two systems may result in non-conformance with the
tested as listed in 1.3.3.
standard. The inch-pound units shall apply unless the “M”
1.3.3 Class designations are as follows (Note 1):
designation of this specification is specified in the order.
Class Heat Treatment on Pipe Radiography, Pressure Test,
see Section see: 1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
10 none none none
ization established in the Decision on Principles for the
11 none 9 none
12 none 98.3 Development of International Standards, Guides and Recom-
13 none none 8.3
mendations issued by the World Trade Organization Technical
20 stress relieved, see 5.3.1 none none
Barriers to Trade (TBT) Committee.
21 stress relieved, see 5.3.1 9 none
22 stress relieved, see 5.3.1 9 8.3
23 stress relieved, see 5.3.1 none 8.3
2. Referenced Documents
30 normalized, see 5.3.2 none none
2.1 ASTM Standards:
31 normalized, see 5.3.2 9 none
32 normalized, see 5.3.2 9 8.3
A20/A20MSpecificationforGeneralRequirementsforSteel
33 normalized, see 5.3.2 none 8.3
Plates for Pressure Vessels
40 normalized and tempered, see 5.3.3 none none
A370Test Methods and Definitions for Mechanical Testing
of Steel Products
A435/A435MSpecification for Straight-Beam Ultrasonic
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Examination of Steel Plates
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
A01.09 on Carbon Steel Tubular Products.
Current edition approved March 1, 2020. Published March 2020. Originally
approved in 1972. Last previous edition approved in 2019 as A671/A671M–19. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
DOI: 10.1520/A0671_A0671M-20. contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
For ASME Boiler and Pressure Vessel Code applications see related Specifi- Standards volume information, refer to the standard’s Document Summary page on
cation SA-671 in Section II of that Code. 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
A671/A671M−20
A530/A530MSpecification for General Requirements for 4.1.5 Size (inside or outside diameter, nominal or minimum
Specialized Carbon and Alloy Steel Pipe wall thickness),
A577/A577MSpecification for Ultrasonic Angle-Beam Ex- 4.1.6 Length (specific or random),
amination of Steel Plates 4.1.7 End finish (11.4),
A578/A578MSpecification for Straight-Beam Ultrasonic 4.1.8 Purchase options, if any (see 5.2.3 and 11.3 of this
Examination of Rolled Steel Plates for Special Applica- specification. See also Specification A530/A530M),
tions 4.1.9 Supplementary requirements, if any.
E110Test Method for Rockwell and Brinell Hardness of
5. Materials and Manufacture
Metallic Materials by Portable Hardness Testers
E165/E165MPractice for Liquid Penetrant Testing for Gen-
5.1 Materials—The steel plate material shall conform to the
eral Industry
requirement of the applicable plate specification for the pipe
E709Guide for Magnetic Particle Testing
grade ordered as listed in Table 1.
2.2 Plate Steels:
5.2 Welding:
A203/A203MSpecificationforPressureVesselPlates,Alloy
5.2.1 The joints shall be double-welded, full-penetration
Steel, Nickel
welds made in accordance with procedures and by welders or
A285/A285MSpecification for Pressure Vessel Plates, Car-
welding operators qualified in accordance with the ASME
bon Steel, Low- and Intermediate-Tensile Strength
Boiler and Pressure Vessel Code, Section IX.
A299/A299MSpecification for Pressure Vessel Plates, Car-
5.2.2 The welds shall be made either manually or automati-
bon Steel, Manganese-Silicon
cally by an electric process involving the deposition of filler
A353/A353MSpecificationforPressureVesselPlates,Alloy
metal.
Steel, Double-Normalized and Tempered 9% Nickel
5.2.3 As welded, the welded joint shall have positive
A515/A515MSpecification for Pressure Vessel Plates, Car-
reinforcement at the center of each side of the weld, but no
bon Steel, for Intermediate- and Higher-Temperature Ser- 1
more than ⁄8 in. [3 mm]. This reinforcement may be removed
vice
at the manufacturer’s option or by agreement between the
A516/A516MSpecification for Pressure Vessel Plates, Car-
manufacturer and purchaser. The contour of the reinforcement
bon Steel, for Moderate- and Lower-Temperature Service
shall be smooth and the deposited metal shall be fused
A517/A517MSpecificationforPressureVesselPlates,Alloy
smoothly and uniformly into the plate surface.
Steel, High-Strength, Quenched and Tempered
5.3 Heat Treatment—All classes other than 10, 11, 12, and
A537/A537MSpecificationforPressureVesselPlates,Heat-
13 shall be heat treated in furnace controlled to 625 °F [615
Treated, Carbon-Manganese-Silicon Steel
°C] and equipped with a recording pyrometer so that heating
A553/A553MSpecificationforPressureVesselPlates,Alloy
records are available. Heat treating after forming and welding
Steel, Quenched and Tempered 7, 8, and 9 % Nickel
shall be to one of the following:
A736/A736MSpecificationforPressureVesselPlates,Low-
Carbon Age-Hardening Nickel-Copper-Chromium-
Molybdenum-Columbium (Niobium) Alloy Steel
TABLE 1 Plate Specifications
2.3 ASME Boiler and Pressure Vessel Code:
Pipe Grade Type of Steel ASTM Specification
Section II
No. Grade /
Class /
Section III
Type
Section VIII
CA 55 plain carbon A285/A285M Gr C
Section IX
CB 60 plain carbon, killed A515/A515M Gr 60
CB 65 plain carbon, killed A515/A515M Gr 65
3. Terminology CB 70 plain carbon, killed A515/A515M Gr 70
CC 60 plain carbon, killed, fine grain A516/A516M Gr 60
3.1 Definitions of Terms Specific to This Standard:
CC 65 plain carbon, killed, fine grain A516/A516M Gr 65
CC 70 plain carbon, killed, fine grain A516/A516M Gr 70
3.1.1 lot—a lot shall consist of 200 ft [60 m] or fraction
CD 70 manganese-silicon, normalized A537/A537M Cl 1
thereof of pipe from the same heat of steel.
CD 80 manganese-silicon, quenched and A537/A537M Cl 2
tempered
CFA 65 nickel steel A203/A203M Gr A
4. Ordering Information
CFB 70 nickel steel A203/A203M Gr B
4.1 The inquiry and order for material under this specifica- CFD 65 nickel steel A203/A203M Gr D
CFE 70 nickel steel A203/A203M Gr E
tion should include the following information:
CG 100 9 % nickel A353/A353M
4.1.1 Quantity (feet, metres, or number of lengths),
CH 115 9 % nickel A553/A553M Type 1
4.1.2 Name of material (steel pipe, electric-fusionwelded), CJA 115 alloy steel, quenched and tempered A517/A517M Gr A
CJB 115 alloy steel, quenched and tempered A517/A517M Gr B
4.1.3 Specification number,
CJE 115 alloy steel, quenched and tempered A517/A517M Gr E
4.1.4 Grade and class designations (see 1.3),
CJF 115 alloy steel, quenched and tempered A517/A517M Gr F
CJH 115 alloy steel, quenched and tempered A517/A517M Gr H
CJP 115 alloy steel, quenched and tempered A517/A517M Gr P
CK 75 carbon-manganese-silicon A299/A299M Gr A
Available from American Society of Mechanical Engineers (ASME), ASME
CP85 alloy steel, age hardening, quenched A736/A736M Gr A,
International Headquarters, Two Park Ave., New York, NY 10016-5990, http:// and precipitation heat treated Class 3
www.asme.org.
A671/A671M−20
5.3.1 Classes 20, 21, 22, and 23 pipe shall be uniformly temperature for a minimum of ⁄2 h/in. [0.2 h/cm] of thickness
heated within the post-weld heat-treatment temperature range or for ⁄2 h, whichever is greater, and air cooled.
indicated in Table 2 for a minimum of 1 h/in. [0.4 h/cm] of 5.3.5 Classes 70, 71, 72, and 73 pipe shall be uniformly
thickness or for 1 h, whichever is greater. heated to a temperature in the austenitizing range, not exceed-
5.3.2 Classes 30, 31, 32, and 33, pipe shall be uniformly ing the maximum quenching temperature indicated in Table 2,
heated to a temperature in the austenitizing range and not andsubsequentlyquenchedinwateroroil.Afterquenchingthe
exceeding the maximum normalizing temperature indicated in pipe shall be reheated into the precipitation heat treating range
Table 2 and subsequently cooled in air at room temperature. indicated in Table 2 for a time to be determined by the
5.3.3 Classes 40, 41, 42, and 43 pipe shall be normalized in manufacturer.
accordance with 5.3.2. After normalizing, the pipe shall be
6. General Requirements for Delivery
reheatedtothetemperingtemperatureindicatedinTable2asa
minimum and held at temperature for a minimum of ⁄2 h/in. 6.1 Material furnished to this specification shall conform to
[0.2h/cm]ofthicknessorfor ⁄2h,whicheverisgreater,andair the applicable requirements of the current edition of Specifi-
cooled. cation A530/A530M unless otherwise provided herein.
5.3.4 Classes 50, 51, 52, and 53 pipe shall be uniformly
7. Chemical Composition
heated to a temperature in the austenitizing range, and not
exceeding the maximum quenching temperature indicated in 7.1 Product Analysis of Plate—The pipe manufacturer shall
Table 2 and subsequently quenched in water or oil. After
make an analysis of each mill heat of plate material. The
quenching, the pipe shall be reheated to the tempering tem- product analysis so determined shall meet the requirements of
perature indicated in Table 2 as a minimum and held at that the plate specification to which the material was ordered.
A
TABLE 2 Heat Treatment Parameters
B
Pipe Grade ASTM Specification Post-Weld Normalizing Quenching Tempering Precipitation
and Grade / Class / Type Heat-Treatment Temperature, max, Temperature, Temperature, Heat Treatment
Temperature Range °F [°C] unless otherwise max, unless min, Temperature
noted otherwise noted °F [°C] Range °F [°C]
°F [°C] °F [°C]
CA 55 A285/A285M (C) 1100–1250 [590–680] 1700 [925] . . .
CB 60 A515/A515M (60) 1100–1250 [590–680] 1750 [950] . . .
CB 65 A515/A515M (65) 1100–1250 [590–680] 1750 [950] . . .
CB 70 A515/A515M (70) 1100–1250 [590–680] 1750 [950] . . .
C D
CC 60 A516/A516M (60) 1100–1200 [590–650] 1700 [925] 1700 [925] 1100 [590] .
C D
CC 65 A516/A516M (65) 1100–1200 [590–650] 1700 [925] 1700 [920] 1100 [590] .
C D
CC 70 A516/A516M (70) 1100–1200 [590–650] 1700 [925] 1700 [925] 1100 [590] .
CD 70 A537/A537M (Cl 1) 1100–1250 [590–680] 1700 [925] . . .
C
CD 80 A537/A537M (Cl 2) 1100–1250 [590–680] . 1650 [900] 1100 [590] .
CFA 65 A203/A203M (A) 1100–1175 [590–635] 1750 [950] . . .
CFB 70 A203/A203M (B) 1100–1175 [590–635] 1750 [950] . . .
CFD 65 A203/A203M (D) 1100–1175 [590–635] 1750 [950] . . .
CFE 70 A203/A203M (E) 1100–1175 [590–635] 1750 [950] . . .
CG 100 A353/A353M 1025–1085 [550–580] 1650 ± 25 . 1050–1125 .
E
[900 ± 15] plus [560–605]
1450 ± 25 [790 ±
15]
CH 100 A553/A553M (Type 1) 1025–1085 [550–580] 1475–1700 1050–1175 .
F
[800–925] [560–635]
CJA 115 A517/A517M (A) 1000–1100 [540–590] . 1650–1725 1150 [620] .
[900–940]
CJB 115 A517/A517M (B) 1000–1100 [540–590] . 1650–1725 1150 [620] .
[900–940]
CJE 115 A517/A517M (E) 1000–1100 [540–590] . 1650–1725 1150 [620] .
[900–940]
CJF 115 A517/A517M (F) 1000–1100 [540–590] . 1650–1725 1150 [620] .
[900–940]
CJH 115 A517/A517M (H) 1000–1100 [540–590] . 1650–1725 1150 [620] .
[900–940]
CJP 115 A517/A517M (P) 1000–1100 [540–590] . 1650–1725 1150 [620] .
[900–940]
CK 75 A299/A299M (A) 1100–1250 [590–680] 1700 [925] . . .
CP85 A736/A736M (A, Class 3) 1000–1175 [540–635] . 1725 [940] . 1000–1225
[540–665]
A
Where ellipses ({) appear in this table, there is no requirement.
B
Numbers indicate minimum tensile strength in ksi.
C
In no case shall the post-weld heat-treatment temperature exceed the mill tempering temperature.
D
Tempering range 1100 to 1300 [590 to 705], if accelerated cooling utilized per Specification A516/A516M.
E
If hot forming is performed after heating to a temperature in the range from 1650 to 1750°F [900 to 955°C], the first normalize may be omitted.
F
Prior to the tempering treatment, the plates may be subjected to an intermediate heat treatment consisting of heating to a temperature in the range from 1165 to 1290°F
[630 to 700°C] and either air-cooled or water quenched. See Specification A553/A553M for hold times and cooling instructions.
A671/A671M−20
7.2 Product Analyses of Weld—The pipe manufacturer shall 9. Radiographic Examination
makeananalysisoffinisheddepositedweldmaterialfromeach
9.1 ThefulllengthofeachweldofClassesX1andX2shall
200ft[60m]orfractionthereof.Analysesshallconformtothe
be radiographically examined in accordance with and meet the
welding procedure for deposited weld metal.
requirements of ASME Boiler and Pressure Vessel Code,
7.3 Analysis may be taken from the mechanical test speci-
Section VIII, Paragraph UW–51.
mens. The results of the analyses shall be reported to the
9.2 Radiographic examination may be performed prior to
purchaser.
heat treatment.
8. Mechanical Requirements
10. Rework
8.1 Tension Test:
10.1 Elimination of Surface Imperfections—Unacceptable
8.1.1 All welded pipe manufactured to this specification
surfaceimperfectionsshallberemovedbygrindingormachin-
must have a cross weld tensile test after final heat treatment,
ing.Theremainingthicknessofthesectionshallbenolessthan
and the results must match the base material requirements for
the minimum specified in Section 11. The depression after
ultimate tensile strength of the specified plate material.
grinding or machining shall be blended uniformly into the
Additionally, grades CD XX and CJ XXX, when these are of
surrounding surface.
Class 3x, 4x, or 5x, and Grade CP of 6x and 7x shall have a
transverse base metal tensile test performed on specimens cut
10.2 Repair of Base Metal Defects by Welding:
from finished pipe. The results of these tests shall meet the
10.2.1 Themanufacturermayrepair,bywelding,basemetal
minimum mechanical test requirements of the plate specifica-
where defects have been removed, provided the depth of the
tion.
repair cavity as prepared for welding does not exceed ⁄3 of the
8.1.2 Number of Tests—One test specimen of weld metal
nominal thickness and the requirements of 10.2.2, 10.2.3,
and one specimen of base metal, if required by 8.1.1, shall be
10.2.4, 10.2.5 and 10.2.6
...

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: A671/A671M − 19 A671/A671M − 20
Standard Specification for
Electric-Fusion-Welded Steel Pipe for Atmospheric and
Lower Temperatures
This standard is issued under the fixed designation A671/A671M; 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 electric-fusion-welded steel pipe with filler metal added, fabricated from pressure vessel quality
plate of several analyses and strength levels and suitable for high-pressure service at atmospheric and lower temperatures. Heat
treatment may or may not be required to attain the desired properties or to comply with applicable code requirements.
Supplementary requirements are provided for use when additional testing or examination is desired.
1.2 The specification nominally covers pipe 16 in. [400 mm] in outside diameter or larger and of ⁄4 in. [6 mm] wall thickness
or greater. Pipe having other dimensions may be furnished provided it complies with all other requirements of this specification.
1.3 Several grades and classes of pipe are provided.
1.3.1 Grade designates the type of plate used as listed in 5.1.
1.3.2 Class designates the type of heat treatment performed during manufacture of the pipe, whether the weld is radiographically
examined, and whether the pipe has been pressure tested as listed in 1.3.3.
1.3.3 Class designations are as follows (Note 1):
Class Heat Treatment on Pipe Radiography, Pressure Test,
see Section see:
10 none none none
11 none 9 none
12 none 9 8.3
13 none none 8.3
20 stress relieved, see 5.3.1 none none
21 stress relieved, see 5.3.1 9 none
22 stress relieved, see 5.3.1 9 8.3
23 stress relieved, see 5.3.1 none 8.3
30 normalized, see 5.3.2 none none
31 normalized, see 5.3.2 9 none
32 normalized, see 5.3.2 9 8.3
33 normalized, see 5.3.2 none 8.3
40 normalized and tempered, see 5.3.3 none none
41 normalized and tempered, see 5.3.3 9 none
42 normalized and tempered, see 5.3.3 9 8.3
43 normalized and tempered, see 5.3.3 none 8.3
50 quenched and tempered, see 5.3.4 none none
51 quenched and tempered, see 5.3.4 9 none
52 quenched and tempered, see 5.3.4 9 8.3
53 quenched and tempered, see 5.3.4 none 8.3
70 quenched and precipitation heat none none
treated
71 quenched and precipitation heat 9 none
treated
72 quenched and precipitation heat 9 8.3
treated
73 quenched and precipitation heat none 8.3
treated
NOTE 1—Selection of materials should be made with attention to temperature of service. For such guidance, Specification A20/A20M may be
consulted.
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 Nov. 1, 2019March 1, 2020. Published November 2019March 2020. Originally approved in 1972. Last previous edition approved in 20162019
as A671/A671M – 16a.A671/A671M – 19. DOI: 10.1520/A0671_A0671M-19.10.1520/A0671_A0671M-20.
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-671 in Section II of that Code.
*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
A671/A671M − 20
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units
are shown in brackets. 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.
1.5 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:
A20/A20M Specification for General Requirements for Steel Plates for Pressure Vessels
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A435/A435M Specification for Straight-Beam Ultrasonic Examination of Steel Plates
A530/A530M Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe
A577/A577M Specification for Ultrasonic Angle-Beam Examination of Steel Plates
A578/A578M Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications
E110 Test Method for Rockwell and Brinell Hardness of Metallic Materials by Portable Hardness Testers
E165/E165M Practice for Liquid Penetrant Testing for General Industry
E709 Guide for Magnetic Particle Testing
2.2 Plate Steels:
A203/A203M Specification for Pressure Vessel Plates, Alloy Steel, Nickel
A285/A285M Specification for Pressure Vessel Plates, Carbon Steel, Low- and Intermediate-Tensile Strength
A299/A299M Specification for Pressure Vessel Plates, Carbon Steel, Manganese-Silicon
A353/A353M Specification for Pressure Vessel Plates, Alloy Steel, Double-Normalized and Tempered 9 % Nickel
A515/A515M Specification for Pressure Vessel Plates, Carbon Steel, for Intermediate- and Higher-Temperature Service
A516/A516M Specification for Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service
A517/A517M Specification for Pressure Vessel Plates, Alloy Steel, High-Strength, Quenched and Tempered
A537/A537M Specification for Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel
A553/A553M Specification for Pressure Vessel Plates, Alloy Steel, Quenched and Tempered 7, 8, and 9 % Nickel
A736/A736M Specification for Pressure Vessel Plates, Low-Carbon Age-Hardening Nickel-Copper-Chromium-Molybdenum-
Columbium (Niobium) Alloy Steel
2.3 ASME Boiler and Pressure Vessel Code:
Section II
Section III
Section VIII
Section IX
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 lot—a lot shall consist of 200 ft [60 m] or fraction thereof of pipe from the same heat of steel.
4. Ordering Information
4.1 The inquiry and order for material under this specification should include the following information:
4.1.1 Quantity (feet, metres, or number of lengths),
4.1.2 Name of material (steel pipe, electric-fusionwelded),
4.1.3 Specification number,
4.1.4 Grade and class designations (see 1.3),
4.1.5 Size (inside or outside diameter, nominal or minimum wall thickness),
4.1.6 Length (specific or random),
4.1.7 End finish (11.4),
4.1.8 Purchase options, if any (see 5.2.3 and 11.3 of this specification. See also Specification A530/A530M),
4.1.9 Supplementary requirements, if any.
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 Society of Mechanical Engineers (ASME), ASME International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
www.asme.org.
A671/A671M − 20
5. Materials and Manufacture
5.1 Materials—The steel plate material shall conform to the requirement of the applicable plate specification for the pipe grade
ordered as listed in Table 1.
5.2 Welding:
5.2.1 The joints shall be double-welded, full-penetration welds made in accordance with procedures and by welders or welding
operators qualified in accordance with the ASME Boiler and Pressure Vessel Code, Section IX.
5.2.2 The welds shall be made either manually or automatically by an electric process involving the deposition of filler metal.
5.2.3 As welded, the welded joint shall have positive reinforcement at the center of each side of the weld, but no more than ⁄8
in. [3 mm]. This reinforcement may be removed at the manufacturer’s option or by agreement between the manufacturer and
purchaser. The contour of the reinforcement shall be smooth and the deposited metal shall be fused smoothly and uniformly into
the plate surface.
5.3 Heat Treatment—All classes other than 10, 11, 12, and 13 shall be heat treated in furnace controlled to 6 25 °F [6 15 °C]
and equipped with a recording pyrometer so that heating records are available. Heat treating after forming and welding shall be
to one of the following:
5.3.1 Classes 20, 21, 22, and 23 pipe shall be uniformly heated within the post-weld heat-treatment temperature range indicated
in Table 2 for a minimum of 1 h/in. [0.4 h/cm] of thickness or for 1 h, whichever is greater.
5.3.2 Classes 30, 31, 32, and 33, pipe shall be uniformly heated to a temperature in the austenitizing range and not exceeding
the maximum normalizing temperature indicated in Table 2 and subsequently cooled in air at room temperature.
5.3.3 Classes 40, 41, 42, and 43 pipe shall be normalized in accordance with 5.3.2. After normalizing, the pipe shall be reheated
to the tempering temperature indicated in Table 2 as a minimum and held at temperature for a minimum of ⁄2 h/in. [0.2 h/cm] of
thickness or for ⁄2 h, whichever is greater, and air cooled.
5.3.4 Classes 50, 51, 52, and 53 pipe shall be uniformly heated to a temperature in the austenitizing range, and not exceeding
the maximum quenching temperature indicated in Table 2 and subsequently quenched in water or oil. After quenching, the pipe
shall be reheated to the tempering temperature indicated in Table 2 as a minimum and held at that temperature for a minimum of
1 1
⁄2 h/in. [0.2 h/cm] of thickness or for ⁄2 h, whichever is greater, and air cooled.
5.3.5 Classes 70, 71, 72, and 73 pipe shall be uniformly heated to a temperature in the austenitizing range, not exceeding the
maximum quenching temperature indicated in Table 2, and subsequently quenched in water or oil. After quenching the pipe shall
be reheated into the precipitation heat treating range indicated in Table 2 for a time to be determined by the manufacturer.
6. General Requirements for Delivery
6.1 Material furnished to this specification shall conform to the applicable requirements of the current edition of Specification
A530/A530M unless otherwise provided herein.
TABLE 1 Plate Specifications
Pipe Grade Type of Steel ASTM Specification
No. Grade /
Class /
Type
CA 55 plain carbon A285/A285M Gr C
CB 60 plain carbon, killed A515/A515M Gr 60
CB 65 plain carbon, killed A515/A515M Gr 65
CB 70 plain carbon, killed A515/A515M Gr 70
CC 60 plain carbon, killed, fine grain A516/A516M Gr 60
CC 65 plain carbon, killed, fine grain A516/A516M Gr 65
CC 70 plain carbon, killed, fine grain A516/A516M Gr 70
CD 70 manganese-silicon, normalized A537/A537M Cl 1
CD 80 manganese-silicon, quenched and A537/A537M Cl 2
tempered
CFA 65 nickel steel A203/A203M Gr A
CFB 70 nickel steel A203/A203M Gr B
CFD 65 nickel steel A203/A203M Gr D
CFE 70 nickel steel A203/A203M Gr E
CG 100 9 % nickel A353/A353M
CH 115 9 % nickel A553/A553M Type 1
CJA 115 alloy steel, quenched and tempered A517/A517M Gr A
CJB 115 alloy steel, quenched and tempered A517/A517M Gr B
CJE 115 alloy steel, quenched and tempered A517/A517M Gr E
CJF 115 alloy steel, quenched and tempered A517/A517M Gr F
CJH 115 alloy steel, quenched and tempered A517/A517M Gr H
CJP 115 alloy steel, quenched and tempered A517/A517M Gr P
CK 75 carbon-manganese-silicon A299/A299M Gr A
CP85 alloy steel, age hardening, quenched A736/A736M Gr A,
and precipitation heat treated Class 3
A671/A671M − 20
A
TABLE 2 Heat Treatment Parameters
B
Pipe Grade ASTM Specification Post-Weld Normalizing Quenching Tempering Precipitation
and Grade / Class / Type Heat-Treatment Temperature, max, Temperature, Temperature, Heat Treatment
Temperature Range °F [°C] unless otherwise max, unless min, Temperature
noted otherwise noted °F [°C] Range °F [°C]
°F [°C] °F [°C]
CA 55 A285/A285M (C) 1100–1250 [590–680] 1700 [925] . . .
CB 60 A515/A515M (60) 1100–1250 [590–680] 1750 [950] . . .
CB 65 A515/A515M (65) 1100–1250 [590–680] 1750 [950] . . .
CB 70 A515/A515M (70) 1100–1250 [590–680] 1750 [950] . . .
C D
CC 60 A516/A516M (60) 1100–1200 [590–650] 1700 [925] 1700 [925] 1100 [590] .
C D
CC 65 A516/A516M (65) 1100–1200 [590–650] 1700 [925] 1700 [920] 1100 [590] .
C D
CC 70 A516/A516M (70) 1100–1200 [590–650] 1700 [925] 1700 [925] 1100 [590] .
CD 70 A537/A537M (Cl 1) 1100–1250 [590–680] 1700 [925] . . .
C
CD 80 A537/A537M (Cl 2) 1100–1250 [590–680] . 1650 [900] 1100 [590] .
CFA 65 A203/A203M (A) 1100–1175 [590–635] 1750 [950] . . .
CFB 70 A203/A203M (B) 1100–1175 [590–635] 1750 [950] . . .
CFD 65 A203/A203M (D) 1100–1175 [590–635] 1750 [950] . . .
CFE 70 A203/A203M (E) 1100–1175 [590–635] 1750 [950] . . .
CG 100 A353/A353M 1025–1085 [550–580] 1650 ± 25 . 1050–1125 .
E
[900 ± 15] plus [560–605]
1450 ± 25 [790 ±
15]
CH 100 A553/A553M (Type 1) 1025–1085 [550–580] 1475–1700 1050–1175 .
F
[800–925] [560–635]
CJA 115 A517/A517M (A) 1000–1100 [540–590] . 1650–1725 1150 [620] .
[900–940]
CJB 115 A517/A517M (B) 1000–1100 [540–590] . 1650–1725 1150 [620] .
[900–940]
CJE 115 A517/A517M (E) 1000–1100 [540–590] . 1650–1725 1150 [620] .
[900–940]
CJF 115 A517/A517M (F) 1000–1100 [540–590] . 1650–1725 1150 [620] .
[900–940]
CJH 115 A517/A517M (H) 1000–1100 [540–590] . 1650–1725 1150 [620] .
[900–940]
CJP 115 A517/A517M (P) 1000–1100 [540–590] . 1650–1725 1150 [620] .
[900–940]
CK 75 A299/A299M (A) 1100–1250 [590–680] 1700 [925] . . .
CP85 A736/A736M (A, Class 3) 1000–1175 [540–635] . 1725 [940] . 1000–1225
[540–665]
A
Where ellipses ({) appear in this table, there is no requirement.
B
Numbers indicate minimum tensile strength in ksi.
C
In no case shall the post-weld heat-treatment temperature exceed the mill tempering temperature.
D
Tempering range 1100 to 1300 [590 to 705], if accelerated cooling utilized per Specification A516/A516M.
E
If hot forming is performed after heating to a temperature in the range from 1650 to 1750°F [900 to 955°C], the first normalize may be omitted.
F
Prior to the tempering treatment, the plates may be subjected to an intermediate heat treatment consisting of heating to a temperature in the range from 1165 to 1290°F
[630 to 700°C] and either air-cooled or water quenched. See Specification A553/A553M for hold times and cooling instructions.
7. Chemical Composition
7.1 Product Analysis of Plate—The pipe manufacturer shall make an analysis of each mill heat of plate material. The product
analysis so determined shall meet the requirements of the plate specification to which the material was ordered.
7.2 Product Analyses of Weld—The pipe manufacturer shall make an analysis of finished deposited weld material from each 200
ft [60 m] or fraction thereof. Analyses shall conform to the welding procedure for deposited weld metal.
7.3 Analysis may be taken from the mechanical test specimens. The results of the analyses shall be reported to the purchaser.
8. Mechanical Requirements
8.1 Tension Test:
8.1.1 Requirements—Transverse tensile properties of the welded joint shall meet the minimum All welded pipe manufactured
to this specification must have a cross weld tensile test after final heat treatment, and the results must match the base material
requirements for ultimate tensile strength of the specified plate material. In addition for Grades CD and CJ, Additionally, grades
CD XX and CJ XXX, when these are of Class 3x, 4x, or 5x, and Grade CP of 7x, the transverse tensile properties of the base plate
shall be determined6x and 7x shall have a transverse base metal tensile test performed on specimens cut from the heat-treated pipe.
These properties finished pipe. The results of these tests shall meet the minimum mechanical test requirements of the plate
specification.
8.1.2 Number of Tests—One test specimen of weld metal and one specimen of base metal, if required by 8.1.1, shall be made
and tested to represent each lot of finished pipe.
8.1.3 Test Specimen Location and Orientation—The test specimens shall be taken transverse to the weld at the end of the
finished pipe and may be flattened cold before final machining to size.
A671/A671M − 20
8.1.4 Test Method—The test specimen shall be made in accordance with QW-150 in Section IX of the ASME Boiler and
Pressure Vessel Code. The test specimen shall be tested at room temperature in accordance with Test Methods and Definitions
A370.
8.2 Transverse Guided Weld Bend Test:
8.2.1 Requirements—The bend test shall be acceptable if no cracks or other defects exceeding ⁄8 in. [3 mm] in any direction
are present in the weld metal or between the weld and the base metal after bending. Cracks that originate along the edges of the
specimen during testing, and that are less than ⁄4 in. [6 mm] measured in any direction shall
...