ASTM A957/A957M-21

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
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