Standard Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use

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 DesignationTitle of SpecificationA 27/A 27MSteel Castings, Carbon, for General Application A 148/A 148MSteel Castings, High-Strength, for Structural Purposes A 297/A 297MSteel 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 494MCastings, Nickel and Nickel AlloyA 560/A 560MCastings, Chromium-Nickel AlloyA 732/A 732MCastings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures A 743/A 743MCastings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion-Resistant, for General Application A 744/A 744MCastings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service A 747/A 747MSteel Castings, Stainless, Precipitation Hardening A 890/A 890MCastings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for General ApplicationA 915/A 915MSteel 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 herein 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 inch-pound or SI units are to be regarded separately as standard. Within the text, the SI units 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 A 957 and SI units for material ordered to Specification A 957M.

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ASTM A957-96 - Standard Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: A 957 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Investment Castings, Steel and Alloy, Common
1
Requirements, for General Industrial Use
This standard is issued under the fixed designation A 957; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope be regarded separately as standard. Within the text, the SI units
are shown in brackets. The values stated in each system are not
1.1 This specification covers a group of requirements that
exact equivalents; therefore, each system must be used inde-
are mandatory for castings produced by the investment casting
pendently of the other. Combining values from the two systems
process to meet the metallurgical requirements of the following
may result in nonconformance with the specification. Inch-
steel casting specifications issued by ASTM.
pound units are applicable for material ordered to Specification
ASTM Designation Title of Specification
A 957 and SI units for material ordered to Specification
A 27/A 27M Steel Castings, Carbon, for General Ap-
plication
A 957M.
A 148/A 148M Steel Castings, High-Strength, for Struc-
tural Purposes
2. Referenced Documents
A 297/A 297M Steel Castings, Iron-Chromium and Iron-
2.1 ASTM Standards:
Chromium-Nickel, Heat-Resistant, for
General Application
A 27/A27M Specification for Steel Castings, Carbon, for
A 447/A 447M Steel Castings, Chromium-Nickel-Iron Al-
2
General Application
loy (25-12 Class), for High-Temperature
A 148/A148M Specification for Steel Castings, High
Service
2
A 494/A 494M Castings, Nickel and Nickel Alloy
Strength, for Structural Purposes
A 560/A 560M Castings, Chromium-Nickel Alloy
A 297/A297M Specification for Steel Castings, Iron-
A 732/A 732M Castings, Investment, Carbon and Low
Chromium and Iron-Chromium-Nickel, Heat Resistant, for
Alloy Steel for General Application, and
2
Cobalt Alloy for High Strength at Elevated
General Application
Temperatures
A 370 Test Methods and Definitions for Mechanical Testing
A 743/A 743M Castings, Iron-Chromium, Iron-Chromium-
3
Nickel, Corrosion-Resistant, for General of Steel Products
Application
A 447/A447M Specification for Steel Castings, Chromium-
A 744/A 744M Castings, Iron-Chromium-Nickel, Corro-
Nickel-Iron Alloy (25-12 Class), for High-Temperature
sion Resistant, for Severe Service
2
A 747/A 747M Steel Castings, Stainless, Precipitation Service
Hardening
A 488/A488M Practice for Steel Castings, Welding, Quali-
A 890/A 890M Castings, Iron-Chromium-Nickel-
2
fications of Procedures and Personnel
Molybdenum Corrosion-Resistant, Duplex
(Austenitic/Ferritic) for General Applica- A 494/A494M Specification for Castings, Nickel and
tion 2
Nickel Alloy
A 915/A 915M Steel Castings, Carbon and Alloy, Chemi-
A 560/A560M Specification for Castings, Chromium-
cal Requirements Similar to Standard
2
Wrought Grades
Nickel Alloy
A 609/A609M Practice for Castings, Carbon, Low-Alloy,
1.2 This specification also covers a group of supplementary
and Martensitic Stainless Steel, Ultrasonic Examination
requirements that may be applied to the above specifications as
2
Thereof
indicated therein. These are provided for use when additional
A 732/A732M Castings, Investment, Carbon and Low Al-
testing or inspection is desired and apply only when specified
loy Steel for General Application, and Cobalt Alloy for
individually by the purchaser in the order.
2
High Strength at Elevated Temperatures
1.3 When investment castings are ordered, the requirements
A 743/A743M Specification for Castings, Iron-Chromium,
stated herein form an integral part of the material specification.
Iron-Chromium-Nickel, Corrosion Resistant, for General
In cases of conflict, the requirements of this specification shall
2
Application
take precedence over the individual material specification
A 744/A744M Specification for Castings, Iron-Chromium-
requirements.
2
Nickel, Corrosion Resistant, for Severe Service
1.4 The values stated in either inch-pound or SI units are to
A 747/A747M Specification for Steel Castings, Stainless,
2
Precipitation Hardening
1
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
2
A01.18 on Castings. Annual Book of ASTM Standards, Vol 01.02.
3
Current edition approved May 10, 1996. Published June 1996. Annual Book of ASTM Standards, Vol 01.03.
1

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A 957
A 751 Test Methods, Practices, and Termin
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