ASTM A957/A957M-21
(Specification)Standard Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
Standard Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
ABSTRACT
This specification covers a group of requirements that are mandatory for castings produced by the investment casting process to meet the metallurgical requirements of the following steel casting specifications. Chemical, heat, and product analyses shall be performed wherein the material shall meet the specified composition limits for carbon, manganese, silicon, phosphorus, sulfur, nickel, chromium, molybdenum, vanadium, tungsten, copper, and aluminum. The specified design and dimensions of the ICI test bar shall be employed only for austenitic alloy castings. The material shall conform to mechanical properties including tension test requirements.
SCOPE
1.1 This specification covers a group of requirements that are mandatory for castings produced by the investment casting process to meet the metallurgical requirements of the following steel casting specifications issued by ASTM.
ASTM Designation
Title of Specification
A27/A27M
Steel Castings, Carbon, for General Application
A128/A128M
Steel Castings, Austenitic Manganese
A148/A148M
Steel Castings, High-Strength, for Structural Purposes
A297/A297M
Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat-Resistant, for General Application
A447/A447M
Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-Temperature Service
A494/A494M
Castings, Nickel and Nickel Alloy
A560/A560M
Castings, Chromium-Nickel Alloy
A732/A732M
Castings, Investment, Carbon and Low-Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
A743/A743M
Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion-Resistant, for General Application
A744/A744M
Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service
A747/A747M
Steel Castings, Stainless, Precipitation Hardening
A890/A890M
Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for General Application
A915/A915M
Steel Castings, Carbon and Alloy, Chemical Requirements Similar to Standard Wrought Grades
A958/A958M
Steel Castings, Carbon and Alloy, with Tensile Requirements, Chemical Requirements Similar to Standard Wrought Grades
A1002
Castings, Nickel-Aluminum Ordered Alloy
1.2 This specification also covers a group of supplementary requirements that may be applied to the above specifications as indicated therein. These are provided for use when additional testing or inspection is desired, and apply only when specified individually by the purchaser in the order.
1.3 When investment castings are ordered, the requirements stated in this specification form an integral part of the material specification. In cases of conflict, the requirements of this specification shall take precedence over the individual material specification requirements.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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 nonconformance with the standard.
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.
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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:A957/A957M −21
Standard Specification for
Investment Castings, Steel and Alloy, Common
1
Requirements, for General Industrial Use
This standard is issued under the fixed designationA957/A957M; 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* testing or inspection is desired, and apply only when specified
individually by the purchaser in the order.
1.1 This specification covers a group of requirements that
1.3 When investment castings are ordered, the requirements
are mandatory for castings produced by the investment casting
processtomeetthemetallurgicalrequirementsofthefollowing stated in this specification form an integral part of the material
specification. In cases of conflict, the requirements of this
steel casting specifications issued by ASTM.
specification shall take precedence over the individual material
ASTM Designation Title of Specification
A27/A27M Steel Castings, Carbon, for General Ap-
specification requirements.
plication
1.4 The values stated in either SI units or inch-pound units
A128/A128M Steel Castings, Austenitic Manganese
A148/A148M Steel Castings, High-Strength, for Struc-
are to be regarded separately as standard. The values stated in
tural Purposes
each system may not be exact equivalents; therefore, each
A297/A297M Steel Castings, Iron-Chromium and Iron-
system shall be used independently of the other. Combining
Chromium-Nickel, Heat-Resistant, for
General Application
values from the two systems may result in nonconformance
A447/A447M Steel Castings, Chromium-Nickel-Iron Al-
with the standard.
loy (25-12 Class), for High-Temperature
Service
1.5 This international standard was developed in accor-
A494/A494M Castings, Nickel and Nickel Alloy
dance with internationally recognized principles on standard-
A560/A560M Castings, Chromium-Nickel Alloy
ization established in the Decision on Principles for the
A732/A732M Castings, Investment, Carbon and Low-
Alloy Steel for General Application, and
Development of International Standards, Guides and Recom-
Cobalt Alloy for High Strength at Elevated
mendations issued by the World Trade Organization Technical
Temperatures
A743/A743M Castings, Iron-Chromium, Iron-Chromium- Barriers to Trade (TBT) Committee.
Nickel, Corrosion-Resistant, for General
Application 2. Referenced Documents
A744/A744M Castings, Iron-Chromium-Nickel, Corro-
2
2.1 ASTM Standards:
sion Resistant, for Severe Service
A747/A747M Steel Castings, Stainless, Precipitation
A27/A27M Specification for Steel Castings, Carbon, for
Hardening
General Application
A890/A890M Castings, Iron-Chromium-Nickel-
A128/A128M Specification for Steel Castings, Austenitic
Molybdenum Corrosion-Resistant, Duplex
(Austenitic/Ferritic) for General Applica-
Manganese
tion
A148/A148M Specification for Steel Castings, High
A915/A915M Steel Castings, Carbon and Alloy, Chemi-
Strength, for Structural Purposes
cal Requirements Similar to Standard
Wrought Grades
A297/A297M Specification for Steel Castings, Iron-
A958/A958M Steel Castings, Carbon and Alloy, with
Chromium and Iron-Chromium-Nickel, Heat Resistant,
Tensile Requirements, Chemical Require-
for General Application
ments Similar to Standard Wrought
Grades
A370 Test Methods and Definitions for Mechanical Testing
A1002 Castings, Nickel-Aluminum Ordered Alloy
of Steel Products
1.2 This specification also covers a group of supplementary
A380/A380M Practice for Cleaning, Descaling, and Passi-
requirements that may be applied to the above specifications as
vation of Stainless Steel Parts, Equipment, and Systems
indicated therein. These are provided for use when additional
A447/A447M Specification for Steel Castings, Chromium-
Nickel-Iron Alloy (25-12 Class), for High-Temperature
Service
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
2
A01.18 on Castings. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2021. Published May 2021. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1996. Last previous edition approved in 2020 as A957/A957M – 20. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/A0957_A0957M-21. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor
...
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: A957/A957M − 20 A957/A957M − 21
Standard Specification for
Investment Castings, Steel and Alloy, Common
1
Requirements, for General Industrial Use
This standard is issued under the fixed designation A957/A957M; 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 a group of requirements that are mandatory for castings produced by the investment casting process
to meet the metallurgical requirements of the following steel casting specifications issued by ASTM.
ASTM Designation Title of Specification
A27/A27M Steel Castings, Carbon, for General Ap-
plication
A128/A128M Steel Castings, Austenitic Manganese
A148/A148M Steel Castings, High-Strength, for Struc-
tural Purposes
A297/A297M Steel Castings, Iron-Chromium and Iron-
Chromium-Nickel, Heat-Resistant, for
General Application
A447/A447M Steel Castings, Chromium-Nickel-Iron Al-
loy (25-12 Class), for High-Temperature
Service
A494/A494M Castings, Nickel and Nickel Alloy
A560/A560M Castings, Chromium-Nickel Alloy
A732/A732M Castings, Investment, Carbon and Low-
Alloy Steel for General Application, and
Cobalt Alloy for High Strength at Elevated
Temperatures
A743/A743M Castings, Iron-Chromium, Iron-Chromium-
Nickel, Corrosion-Resistant, for General
Application
A744/A744M Castings, Iron-Chromium-Nickel, Corro-
sion Resistant, for Severe Service
A747/A747M Steel Castings, Stainless, Precipitation
Hardening
A890/A890M Castings, Iron-Chromium-Nickel-
Molybdenum Corrosion-Resistant, Duplex
(Austenitic/Ferritic) for General Applica-
tion
A915/A915M Steel Castings, Carbon and Alloy, Chemi-
cal Requirements Similar to Standard
Wrought Grades
A958/A958M Steel Castings, Carbon and Alloy, with
Tensile Requirements, Chemical Require-
ments Similar to Standard Wrought
Grades
A1002 Castings, Nickel-Aluminum Ordered Alloy
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, 2020May 1, 2021. Published August 2020May 2021. Originally approved in 1996. Last previous edition approved in 20182020 as
A957/A957M – 18a.A957/A957M – 20. DOI: 10.1520/A0957_A0957M-20.10.1520/A0957_A0957M-21.
*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 ----------------------
A957/A957M − 21
1.2 This specification also covers a group of supplementary requirements that may be applied to the above specifications as
indicated therein. These are provided for use when additional testing or inspection is desired, and apply only when specified
individually by the purchaser in the order.
1.3 When investment castings are ordered, the requirements stated in this specification form an integral part of the material
specification. In cases of conflict, the requirements of this specification shall take precedence over the individual material
specification requirements.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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 nonconformance with the standard.
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
2.1 ASTM Standards:
A27/A27M Specification for Steel Castings, Carbon, for General Application
A128/A128M Specification for Steel Castings, Austenitic Manganese
A148/A148M Specification for Steel Castings, High Strength, for Structural Purposes
A297/A297M Specification for Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General
Application
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A380/A380M Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems
A447/A447
...
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