ASTM A757/A757M-22

Standard Specification for Steel Castings, Ferritic and Martensitic, for Pressure-Containing and Other Applications, for Low-Temperature Service

ABSTRACT
This specification covers carbon and alloy steel castings for pressure-containing and other applications intended primarily for petroleum and gas pipelines in areas subject to low-ambient temperatures. Castings shall be heat treated by normalizing and tempering or liquid quenching and tempering. The steel shall be made by the electric furnace process or other primary processes. Heat and product analyses shall be performed on the material and the chemical composition shall conform to the prescribed values for carbon, manganese, nickel, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, also for residual elements like vanadium, copper, nickel, chromium, molybdenum, and tungsten. Tensile test shall be made and the mechanical properties thus determined shall conform to the required tensile strength, yield strength, elongation, and reduction of area. Charpy V-notch testing shall be done to determine the impact properties on each heat by specimen type like coupons representing the weld deposits and coupons representing the heat-affected zone. Impact properties shall also be determined on both the heat-affected zone of the base metal and the weld metal of the welding procedure qualification test. After machining, each pressure-containing casting shall undergo hydrostatic pressure testing and shall not leak.
SCOPE
1.1 This specification covers carbon and alloy steel castings for pressure-containing and other applications intended primarily for petroleum and gas pipelines in areas subject to low-ambient temperatures. Castings shall be heat treated by normalizing and tempering or liquid quenching and tempering. All classes are weldable under proper conditions. Hardenability of some grades may limit usable section size.  
1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.  
1.2.1 Unless the order specifies an “M” designation, the material shall be furnished to inch-pound units.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
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-2022
• ICS: 77.140.80 - Iron and steel castings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.18 - Castings

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:A757/A757M −22
Standard Specification for
Steel Castings, Ferritic and Martensitic, for Pressure-
Containing and Other Applications, for Low-Temperature
1
Service
This standard is issued under the fixed designationA757/A757M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This specification covers carbon and alloy steel castings
A488/A488M Practice for Steel Castings, Welding, Qualifi-
forpressure-containingandotherapplicationsintendedprimar-
cations of Procedures and Personnel
ily for petroleum and gas pipelines in areas subject to low-
A703/A703M Specification for Steel Castings, General
ambient temperatures. Castings shall be heat treated by nor-
Requirements, for Pressure-Containing Parts
malizingandtemperingorliquidquenchingandtempering.All
A985/A985M Specification for Steel Investment Castings
classes are weldable under proper conditions. Hardenability of
General Requirements, for Pressure-Containing Parts
some grades may limit usable section size.
A1067/A1067M Specification for Test Coupons for Steel
Castings
1.2 The values stated in either inch-pound units or SI units
3
2.2 American Society of Mechanical Engineers:
are to be regarded separately as standard. The values stated in
ASME Boiler and Pressure Vessel Code
each system are not exact equivalents; therefore, each system
must be used independently of the other. Combining values 2.3 Manufacturers Standardization Society of the Valve and
4
Fittings Industry Standards:
from the two systems may result in nonconformance with the
MSS SP-55 Quality Standard for Steel Castings for Valves,
standard.
Flanges, Fittings, and Other Piping Components—Visual
1.2.1 Unless the order specifies an “M” designation, the
Method for Evaluation of Surface Irregularities
material shall be furnished to inch-pound units.
3. Terminology
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.1 Definitions of Terms Specific to This Standard:
responsibility of the user of this standard to establish appro-
3.1.1 nominal thickness, T, n—for quenched and tempered
priate safety, health, and environmental practices and deter-
castings with a thickness exceeding 2 in. [50 mm], the
mine the applicability of regulatory limitations prior to use.
maximum thickness of the pressure-containing wall of the
casting exclusive of padding added for directional
1.4 This international standard was developed in accor-
solidification, flanges, appendages, and sections designated by
dance with internationally recognized principles on standard-
the designer as noncritical.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4. General Conditions for Delivery
mendations issued by the World Trade Organization Technical
4.1 Except for investment castings, castings furnished to
Barriers to Trade (TBT) Committee.
this specification shall be in accordance with the requirements
2
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.
1 3
This specification is under the jurisdiction ofASTM Committee A01 on Steel, Available from American Society of Mechanical Engineers (ASME), ASME
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
A01.18 on Castings. www.asme.org.
4
Current edition approved Nov. 1, 2022. Published December 2022. Originally AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
approved in 1978. Last previous edition approved in 2015 as A757/A757M – 15. Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http://www.mss-
DOI: 10.1520/A0757_A0757M-22. hq.com.
*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
1

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A757/A757M−22
A,B
TABLE 1 Chemical Composition Requirements
C
Grade
Type
Element, %
E3N
A1Q A2Q B2N, B2Q B3N, B3Q B4N, B4Q C1Q D1N, D1Q E1Q E2N, E2Q
Mart
...

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: A757/A757M − 15 A757/A757M − 22
Standard Specification for
Steel Castings, Ferritic and Martensitic, for Pressure-
Containing and Other Applications, for Low-Temperature
1
Service
This standard is issued under the fixed designation A757/A757M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This specification covers carbon and alloy steel castings for pressure-containing and other applications intended primarily for
petroleum and gas pipelines in areas subject to low-ambient temperatures. Castings shall be heat treated by normalizing and
tempering or liquid quenching and tempering. All classes are weldable under proper conditions. Hardenability of some grades may
limit usable section size.
1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. The values stated in each
system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two
systems may result in non-conformancenonconformance with the standard.
1.2.1 Unless the order specifies an “M” designation, the material shall be furnished to inch-pound units.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
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
2.1 ASTM Standards:
A488/A488M Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
A703/A703M Specification for Steel Castings, General Requirements, for Pressure-Containing Parts
A985/A985M Specification for Steel Investment Castings General Requirements, for Pressure-Containing Parts
A1067/A1067M Specification for Test Coupons for Steel Castings
3
2.2 American Society of Mechanical Engineers:
ASME Boiler and Pressure Vessel Code
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.18
on Castings.
Current edition approved July 1, 2015Nov. 1, 2022. Published August 2015December 2022. Originally approved in 1978. Last previous edition approved in 20102015
as A757/A757M – 10.A757/A757M – 15. DOI: 10.1520/A757_A757M-15. 10.1520/A0757_A0757M-22.
2
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.
3
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three 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
1

---------------------- Page: 1 ----------------------
A757/A757M − 22
4
2.3 Manufacturers Standardization Society of the Valve and Fittings Industry Standards:
MSS SP-55 Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components - Visual
Components—Visual Method for Evaluation of Surface Irregularities
3. Terminology
3.1 Definitions:Definitions of Terms Specific to This Standard:
3.1.1 Definitions in Specification A703/A703M are applicable to this specification.
3.1.1 nominal thickness, T, n—for quenched and tempered castings with a thickness exceeding 2 in. [50 mm], the maximum
thickness of the pressure-containing wall of the casting exclusive of padding added for directional solidification, flanges,
appendages, and sections designated by the designer as noncritical.
3.1.2 Definition of nominal thickness, T, applies to quenched and tempered castings with a thickness e
...