ASTM A757/A757M-10
(Specification)Standard Specification for Steel Castings, Ferritic and Martensitic, for Pressure-Containing and Other Applications, for Low-Temperature Service
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 non-conformance 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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:A757/A757M −10
StandardSpecification 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.Anumber 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* Requirements, for Pressure-Containing Parts
A941TerminologyRelatingtoSteel,StainlessSteel,Related
1.1 This specification covers carbon and alloy steel castings
Alloys, and Ferroalloys
forpressure-containingandotherapplicationsintendedprimar-
A985/A985MSpecification for Steel Investment Castings
ily for petroleum and gas pipelines in areas subject to low-
General Requirements, for Pressure-Containing Parts
ambient temperatures. Castings shall be heat treated by nor-
3
2.2 American Society of Mechanical Engineers:
malizingandtemperingorliquidquenchingandtempering.All
ASME Boiler and Pressure Vessel Code
classes are weldable under proper conditions. Hardenability of
some grades may limit usable section size.
2.3 Manufacturers Standardization Society of the Valve and
4
Fittings Industry Standards:
1.2 The values stated in either inch-pound units or SI units
MSS SP-55Quality Standard for Steel Castings for Valves,
are to be regarded separately as standard. The values stated in
Flanges, Fittings, and Other Piping Components - Visual
each system are not exact equivalents; therefore, each system
Method for Evaluation of Surface Irregularities
must be used independently of the other. Combining values
from the two systems may result in non-conformance with the
3. Terminology
standard.
1.2.1 Unless the order specifies an “M” designation, the
3.1 Definitions:
material shall be furnished to inch-pound units.
3.1.1 Definitions inTest Methods and Definitions A370 and
Terminology A941 are applicable to this specification.
1.3 This standard does not purport to address all of the
3.1.2 Definition of nominal thickness, T, applies to
safety concerns, if any, associated with its use. It is the
quenched and tempered castings with a thickness exceeding 2
responsibility of the user of this standard to establish appro-
in. [50 mm]. Nominal thickness, T, is the maximum thickness
priate safety and health practices and determine the applica-
of the pressure-containing wall of the casting exclusive of
bility of regulatory limitations prior to use.
padding added for directional solidification, flanges,
2. Referenced Documents appendages, and sections designated by the designer as non-
2
critical.
2.1 ASTM Standards:
A370Test Methods and Definitions for Mechanical Testing
4. General Conditions for Delivery
of Steel Products
A488/A488MPractice for Steel Castings, Welding, Qualifi- 4.1 Except for investment castings, castings furnished to
this specification shall be in accordance with the requirements
cations of Procedures and Personnel
A703/A703M Specification for Steel Castings, General of Specification A703/A703M, including any supplementary
requirementsthatareindicatedinthepurchaseorder.Failureto
comply with the general requirements of Specification A703/
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel, A703M constitutes nonconformance with this specification. In
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee
A01.18 on Castings.
Current edition approved Nov. 1, 2010. Published December 2010. Originally
3
approved in 1978. Last previous edition approved in 2004 as A757/A757M–00 Available from American Society of Mechanical Engineers (ASME), ASME
(2004). DOI: 10.1520/A757/A757M-10. International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or www.asme.org.
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
Standards volume information, refer to the standard’s Document Summary page on Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http://www.mss-
the ASTM website. 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
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A757/A757M−10
TABLE 1 Chemical Requirements (Maximum Percent Unless Range is Given)
D1N1 D1Q1
Grade A1Q A2Q B2N B2Q B3N B3Q B4N B4Q C1Q D1N2 D1Q2 E1Q E2N, E2Q E3N
D1N3 D1Q3
Carbon- Nickel Nickel Martensitic
Nickel
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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–00 (Reapproved 2004) Designation: A757/A757M – 10
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.Anumber 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 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
temperingorliquidquenchingandtempering.Allclassesareweldableunderproperconditions.Hardenabilityofsomegradesmay
limit usable section size.
1.2Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunits
are shown in brackets. 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 specification.
Inch-pound units are applicable for material ordered to Specification A757 and SI units for material ordered to Specification
A757M.
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-conformance 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A488/A488M Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
A703/A703M Specification for Steel Castings, General Requirements, for Pressure-Containing Parts
A919TerminologyRelatingtoHeatTreatmentofMetals941 TerminologyRelatingtoSteel,StainlessSteel,RelatedAlloys,and
Ferroalloys
E29Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
3
E30Test Methods for Chemical Analysis of Steel, Cast Iron, Open-Hearth Iron, and Wrought Iron
3
E38Methods for Chemical Analysis of Nickel-Chromium and Nickel-Chromium-Iron Alloys
E94Guide for Radiographic Examination
E125Reference Photographs for Magnetic Particle Indications on Ferrous Castings
3
E142Method for Controlling Quality of Radiographic Testing
E165Practice for Liquid Penetrant Examination for General Industry
E186Reference Radiographs for Heavy-Walled (2 to 412-in. (50.8 to 114-mm)) Steel Castings
E208Test Method for Conducting Drop-Weight Test to Determine Nil-Ductility Transition Temperature of Ferritic Steels
1
ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteelandRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.18
on Castings.
Current edition approved Oct. 1, 2004. Published October 2004. Originally approved in 1978. Last previous edition approved in 2000 as A757/A757M–00. DOI:
10.1520/A757/A757M-00R04. DOI: 10.1520/A0757_A0757M-00R04.
Current edition approved Nov. 1, 2010. Published December 2010. Originally approved in 1978. Last previous edition approved in 2004 as A757/A757M–00 (2004).
DOI: 10.1520/A757/A757M-10.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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A757/A757M – 10
E280Reference Radiographs for Heavy-Walled (412 to 12-in. (114 to 305-mm)) Steel Castings
E350Test M
...
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