ASTM A957/A957M-09
(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
A 27/A 27M Steel Castings, Carbon, for General Application A 148/A 148M Steel Castings, High-Strength, for Structural Purposes A 297/A 297M Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat-Resistant, for General Application A 447/A 447M Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-Temperature Service A 494/A 494M Castings, Nickel and Nickel Alloy A 560/A 560M Castings, Chromium-Nickel Alloy A 732/A 732M Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures A 743/A 743M Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion-Resistant, for General Application A 744/A 744M Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service A 747/A 747M Steel Castings, Stainless, Precipitation Hardening A 890/A 890M Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for General Application A 915/A 915M Steel Castings, Carbon and Alloy, Chemical Requirements Similar to Standard Wrought Grades
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 non-conformance with the standard.
General Information
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Standards Content (Sample)
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Designation: A 957/A 957M – 09
Standard Specification for
Investment Castings, Steel and Alloy, Common
1
Requirements, for General Industrial Use
This standard is issued under the fixed designationA 957/A 957M; 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 (ϵ) indicates an editorial change since the last revision or reapproval.
1. Scope* specification shall take precedence over the individual material
specification requirements.
1.1 This specification covers a group of requirements that
1.4 The values stated in either SI units or inch-pound units
are mandatory for castings produced by the investment casting
are to be regarded separately as standard. The values stated in
processtomeetthemetallurgicalrequirementsofthefollowing
each system may not be exact equivalents; therefore, each
steel casting specifications issued by ASTM.
system shall be used independently of the other. Combining
ASTM Designation Title of Specification
values from the two systems may result in non-conformance
A 27/A 27MA27/A27M Steel Castings, Carbon, for General Ap-
plication
with the standard.
A 148/A 148MA148/A148M Steel Castings, High-Strength, for Struc-
tural Purposes
2. Referenced Documents
A 297/A 297MA297/A297M Steel Castings, Iron-Chromium and Iron-
2
Chromium-Nickel, Heat-Resistant, for
2.1 ASTM Standards:
General Application
A27/A27M Specification for Steel Castings, Carbon, for
A 447/A 447M A447/A447M Steel Castings, Chromium-Nickel-Iron Al-
General Application
loy (25-12 Class), for High-Temperature
Service
A148/A148M Specification for Steel Castings, High
A 494/A 494MA494/A494M Castings, Nickel and Nickel Alloy
Strength, for Structural Purposes
A 560/A 560MA560/A560M Castings, Chromium-Nickel Alloy
A 732/A 732MA732/A732M Castings, Investment, Carbon and Low A297/A297M Specification for Steel Castings, Iron-
Alloy Steel for General Application, and
ChromiumandIron-Chromium-Nickel,HeatResistant,for
Cobalt Alloy for High Strength at Elevated
General Application
Temperatures
A 743/A 743MA743/A743M Castings, Iron-Chromium, Iron-Chromium- A370 Test Methods and Definitions for Mechanical Testing
Nickel, Corrosion-Resistant, for General
of Steel Products
Application
A380 Practice for Cleaning, Descaling, and Passivation of
A 744/A 744MA744/A744M Castings, Iron-Chromium-Nickel, Corro-
sion Resistant, for Severe Service
Stainless Steel Parts, Equipment, and Systems
A 747/A 747MA747/A747M Steel Castings, Stainless, Precipitation
A447/A447M Specification for Steel Castings, Chromium-
Hardening
Nickel-Iron Alloy (25-12 Class), for High-Temperature
A 890/A 890MA890/A890M Castings, Iron-Chromium-Nickel-
Molybdenum Corrosion-Resistant, Duplex
Service
(Austenitic/Ferritic) for General Applica-
A488/A488M Practice for Steel Castings, Welding, Quali-
tion
fications of Procedures and Personnel
A 915/A 915MA915/A915M Steel Castings, Carbon and Alloy, Chemi-
cal Requirements Similar to Standard
A494/A494M Specification for Castings, Nickel and Nickel
Wrought Grades
Alloy
A560/A560M SpecificationforCastings,Chromium-Nickel
1.2 This specification also covers a group of supplementary
requirements that may be applied to the above specifications as Alloy
indicated therein. These are provided for use when additional A609/A609M Practice for Castings, Carbon, Low-Alloy,
testing or inspection is desired and apply only when specified and Martensitic Stainless Steel, Ultrasonic Examination
individually by the purchaser in the order. Thereof
1.3 When investment castings are ordered, the requirements A732/A732M Specification for Castings, Investment, Car-
stated in this specification form an integral part of the material bon and Low Alloy Steel for General Application, and
specification. In cases of conflict, the requirements of this Cobalt Alloy for High Strength at Elevated Temperatures
A743/A743M Specification for Castings, Iron-Chromium,
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
2
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee For referenced ASTM standards, visit the ASTM website, www.astm.org, or
A01.18 on Castings. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Jan. 1, 2009. Published January 2009. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1996. Last previous edition approved in 2008 as A 957/A 957M – 08. 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.
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