ASTM A494/A494M-18a

Standard Specification for Castings, Nickel and Nickel Alloy

ABSTRACT
This specification covers nickel, nickel-copper, nickel-copper-silicon, nickel-molybdenum, nickel-chromium, and nickel-molybdenum-chromium alloy castings for corrosion resistant service. The castings shall be heat treated. When Class 1 is specified, grades CY40 and M25S shall be supplied in the as-cast condition. When Class 2 is specified, grades CY40 and M25S shall be supplied in the solution treated condition. When Class 3 is specified, grade M25S shall be supplied in the age-hardened condition. The chemical composition requirements of the alloys are presented. The tensile property requirements including the heat treatment procedure for the castings are presented in detail. It is required that one tension test shall be made from each master heat except for grades M25S and CY5SnBiM when the master heat is used to pour the castings. One tension test shall be made from each melt except for grades M25S and CY5SnBiM. Test results shall conform to the specified tensile requirements.
SCOPE
1.1 This specification covers nickel, nickel-copper, nickel-copper-silicon, nickel-molybdenum, nickel-chromium, and nickel-molybdenum-chromium alloy castings for corrosion-resistant service.  
1.2 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.  
1.3 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.

General Information

• Status: Historical
• Publication Date: 31-Oct-2018
• ICS: 77.150.40 - Nickel and chromium products
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.18 - Castings

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:A494/A494M −18a
Standard Specification for
1
Castings, Nickel and Nickel Alloy
This standard is issued under the fixed designationA494/A494M; 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* E8/E8MTest Methods for Tension Testing of Metallic Ma-
terials
1.1 This specification covers nickel, nickel-copper, nickel-
E29Practice for Using Significant Digits in Test Data to
copper-silicon, nickel-molybdenum, nickel-chromium, and
Determine Conformance with Specifications
nickel-molybdenum-chromium alloy castings for corrosion-
E30TestMethodsforChemicalAnalysisofSteel,CastIron,
resistant service.
3
Open-Hearth Iron, and Wrought Iron (Withdrawn 1995)
1.2 The values stated in either SI units or inch-pound units
E38Methods for Chemical Analysis of Nickel-Chromium
3
are to be regarded separately as standard. The values stated in
and Nickel-Chromium-Iron Alloys (Withdrawn 1989)
each system may not be exact equivalents; therefore, each
E76Test Methods for Chemical Analysis of Nickel-Copper
3
system shall be used independently of the other. Combining
Alloys (Withdrawn 2003)
values from the two systems may result in nonconformance
E354 Test Methods for Chemical Analysis of High-
with the standard.
Temperature,Electrical,Magnetic,andOtherSimilarIron,
1.3 This international standard was developed in accor-
Nickel, and Cobalt Alloys
dance with internationally recognized principles on standard-
3. Terminology
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
3.1 Definitions:
mendations issued by the World Trade Organization Technical
3.1.1 master heat—a single furnace charge of refined alloy,
Barriers to Trade (TBT) Committee.
whichmayeitherbepoureddirectlyintocastingsorintoremelt
alloy for individual melts.
2. Referenced Documents
3.1.2 melts—a single furnace charge poured into castings.
2
2.1 ASTM Standards:
When master heats are used to prepare melts, a melt analysis
A370Test Methods and Definitions for Mechanical Testing
shall be reported.
of Steel Products
4. General Conditions for Delivery
A488/A488MPractice for Steel Castings, Welding, Qualifi-
cations of Procedures and Personnel
4.1 Except for investment castings, castings furnished to
A732/A732MSpecification for Castings, Investment, Car-
this specification shall conform to the requirements of Speci-
bon and Low Alloy Steel for General Application, and
fication A781/A781M, including any supplementary require-
Cobalt Alloy for High Strength at Elevated Temperatures
ments that are indicated on the purchase order. Failure to
A781/A781MSpecification for Castings, Steel and Alloy,
comply with the general requirements of Specification A781/
Common Requirements, for General Industrial Use
A781M constitutes nonconformance with this specification. In
A957/A957MSpecification for Investment Castings, Steel
case of conflict between the requirements of this specification
andAlloy, Common Requirements, for General Industrial
and Specification A781/A781M, this specification shall pre-
Use
vail.
4.2 Investment castings furnished to this specification shall
1 conform to the requirements of Specification A957/A957M,
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee includinganysupplementaryrequirementsthatareindicatedin
A01.18 on Castings.
the purchase order. Failure to comply with the general require-
Current edition approved Nov. 1, 2018. Published November 2018. Originally
ments of Specification A957/A957M constitutes nonconfor-
approved in 1963. Last previous edition approved in 2018 as A494/A494M–18.
mance with this specification. In case of conflict between the
DOI: 10.1520/A0494_A0494M-18A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
*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 ----------------------
A494/A494M−18a
requirements of this specification and Specification A957/ 6. Heat Treatment
A957M, Specification A957/A957M shall prevail.
6.1 Castings shall be heat tre
...

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: A494/A494M − 18 A494/A494M − 18a
Standard Specification for
1
Castings, Nickel and Nickel Alloy
This standard is issued under the fixed designation A494/A494M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This specification covers nickel, nickel-copper, nickel-copper-silicon, nickel-molybdenum, nickel-chromium, and nickel-
molybdenum-chromium alloy castings for corrosion-resistant service.
1.2 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.
1.3 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:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A488/A488M Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
A732/A732M Specification for Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy
for High Strength at Elevated Temperatures
A781/A781M Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use
A957/A957M Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
E8/E8M Test Methods for Tension Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
3
E30 Test Methods for Chemical Analysis of Steel, Cast Iron, Open-Hearth Iron, and Wrought Iron (Withdrawn 1995)
3
E38 Methods for Chemical Analysis of Nickel-Chromium and Nickel-Chromium-Iron Alloys (Withdrawn 1989)
3
E76 Test Methods for Chemical Analysis of Nickel-Copper Alloys (Withdrawn 2003)
E354 Test Methods for Chemical Analysis of High-Temperature, Electrical, Magnetic, and Other Similar Iron, Nickel, and
Cobalt Alloys
3. Terminology
3.1 Definitions:
3.1.1 master heat—a single furnace charge of refined alloy, which may either be poured directly into castings or into remelt alloy
for individual melts.
3.1.2 melts—a single furnace charge poured into castings. When master heats are used to prepare melts, a melt analysis shall
be reported.
4. General Conditions for Delivery
4.1 Except for investment castings, castings furnished to this specification shall conform to the requirements of Specification
A781/A781M, including any supplementary requirements that are indicated on the purchase order. Failure to comply with the
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 Sept. 1, 2018Nov. 1, 2018. Published September 2018November 2018. Originally approved in 1963. Last previous edition approved in 20172018
as A494/A494M – 17a.A494/A494M – 18. DOI: 10.1520/A0494_A0494M-18.10.1520/A0494_A0494M-18A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
*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 ----------------------
A494/A494M − 18a
general requirements of Specification A781/A781M constitutes nonconformance with this specification. In case of conflict between
the requirements of this specification and Specification A781/A781M, this specification shall prevail.
4.2 Investment castings furnished to this specification shall conform to the requirements of Specification A957/A95
...