ASTM A747/A747M-12
(Specification)Standard Specification for Steel Castings, Stainless, Precipitation Hardening
Standard Specification for Steel Castings, Stainless, Precipitation Hardening
ABSTRACT
This specification covers iron-chromium-nickel-copper corrosion resistance steel castings capable of being strengthened by precipitation hardening heat treatment. The steel shall be made by electric furnace process with or without separate refining such as argon-oxygen decarburization. The steel materials shall also undergo homogenization heat treatment, solution annealing heat treatment, precipitation hardening and shall conform to the required values of temperature and time and cooling treatment. The materials shall conform to the required chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, chromium, nickel, copper, columbium, and nitrogen.
SCOPE
1.1 This specification covers iron-chromium-nickel-copper corrosion-resistant steel castings, capable of being strengthened by precipitation hardening heat treatment.
1.2 These castings may be used in services requiring corrosion resistance and high strengths at temperatures up to 600°F [315°C]. They may be machined in the solution-annealed condition and subsequently precipitation hardened to the desired high-strength mechanical properties specified in Table S14.1 with little danger of cracking or distortion.
1.3 The material is not intended for use in the solution-annealed condition.
Note 1—If the service environment in which the material is to be used is considered conducive to stress-corrosion cracking, precipitation hardening should be performed at a temperature that will minimize the susceptibility of the material to this type of attack.
1.4 Supplementary requirements of an optional nature are provided for use at the option of the purchaser. The Supplementary requirements shall apply only when specified individually by the purchaser in the purchase order or contract.
1.5 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply.
1.6 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.
1.6.1 Within the text, the SI units are shown in brackets.
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Designation:A747/A747M −12
StandardSpecification for
1
Steel Castings, Stainless, Precipitation Hardening
This standard is issued under the fixed designationA747/A747M; 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* 2. Referenced Documents
2
1.1 This specification covers iron-chromium-nickel-copper 2.1 ASTM Standards:
corrosion-resistant steel castings, capable of being strength- A370 Test Methods and Definitions for Mechanical Testing
ened by precipitation hardening heat treatment. of Steel Products
A781/A781M Specification for Castings, Steel and Alloy,
1.2 These castings may be used in services requiring corro-
Common Requirements, for General Industrial Use
sion resistance and high strengths at temperatures up to 600°F
A957/A957M Specification for Investment Castings, Steel
[315°C]. They may be machined in the solution-annealed
and Alloy, Common Requirements, for General Industrial
condition and subsequently precipitation hardened to the de-
Use
sired high-strength mechanical properties specified in Table
3
2.2 ASME Standard:
S14.1 with little danger of cracking or distortion.
ASME Boiler and Pressure Vessel Code, Supplementary
1.3 The material is not intended for use in the solution-
Requirements S6, S14, and S27
annealed condition.
3. General Conditions for Delivery
NOTE 1—If the service environment in which the material is to be used
is considered conducive to stress-corrosion cracking, precipitation hard-
3.1 Except for investment castings, castings furnished to
ening should be performed at a temperature that will minimize the
this specification shall be in accordance with the requirements
susceptibility of the material to this type of attack.
of Specification A781/A781M, including any supplementary
1.4 Supplementary requirements of an optional nature are
requirements that are indicated in the purchase order. Failure to
provided for use at the option of the purchaser. The Supple-
comply with the general requirements of Specification A781/
mentary requirements shall apply only when specified indi-
A781M constitutes nonconformance with this specification. In
vidually by the purchaser in the purchase order or contract.
case of conflict between the requirements of this specification
1.5 This specification is expressed in both inch-pound units and Specification A781/A781M, this specification shall pre-
and in SI units; however, unless the purchase order or contract vail.
specifies the applicable M specification designation (SI units),
3.2 Steel investment castings furnished to this specification
the inch-pound units shall apply.
shall conform to the requirements of Specification A957/
1.6 The values stated in either SI units or inch-pound units A957M, including any supplementary requirements that are
are to be regarded separately as standard. The values stated in indicated in the purchase order. Failure to comply with the
each system may not be exact equivalents; therefore, each general requirements of Specification A957/A957M consti-
system shall be used independently of the other. Combining tutes nonconformance with this specification. In case of con-
values from the two systems may result in non-conformance flict between the requirements of this specification and Speci-
with the standard. fication A957/A957M, A957/A957M shall prevail.
1.6.1 Within the text, the SI units are shown in brackets.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee Standards volume information, refer to the standard’s Document Summary page on
A01.18 on Castings. the ASTM website.
3
Current edition approved March 1, 2012. Published April 2012. Originally Available from American Society of Mechanical Engineers (ASME), ASME
approved in 1977. Last previous edition approved in 2007 as A747/A747M – 07. International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
DOI: 10.1520/A0747_A0747M-12. www.asme.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 ----------------------
A747/A747M−12
4. Ordering Information [1050°C 6 30°C], holding the 30 min/in. [1.2 min/mm] of
section but not less than 30 min, and cooling to below 90°F
4.1 Orders for material to this specification should include
[30°C].
th
...
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:A747/A747M–07 Designation: A747/A747M – 12
Standard Specification for
1
Steel Castings, Stainless, Precipitation Hardening
This standard is issued under the fixed designationA747/A747M; 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 iron-chromium-nickel-copper corrosion-resistant steel castings, capable of being strengthened by
precipitation hardening heat treatment.
1.2 These castings may be used in services requiring corrosion resistance and high strengths at temperatures up to 600°F
[315°C]. They may be machined in the solution-annealed condition and subsequently precipitation hardened to the desired
high-strength mechanical properties specified in Table S14.1 with little danger of cracking or distortion.
1.3 The material is not intended for use in the solution-annealed condition.
NOTE 1—If the service environment in which the material is to be used is considered conducive to stress-corrosion cracking, precipitation hardening
should be performed at a temperature that will minimize the susceptibility of the material to this type of attack.
1.4Supplementary1.4 Supplementary requirements of an optional nature are provided for use at the option of the purchaser.The
Supplementary requirements shall apply only when specified individually by the purchaser in the purchase order or contract.
1.5This1.5 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or
contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply.
1.6 The values stated in either inch-poundSI units or SIinch-pound units are to be regarded separately as standard. Within the
text,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshall
be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.6.1 Within the text, the SI units are shown in brackets.
2. Referenced Documents
2
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
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
3
2.2 ASME Standard:
ASME Boiler and Pressure Vessel Code, Supplementary Requirements S6, S14, and S27
3. General Conditions for Delivery
3.1 Except for investment castings, castings furnished to this specification shall be in accordance with the requirements of
SpecificationA781/A781M, including any supplementary requirements that are indicated in the purchase order. Failure to comply
withthegeneralrequirementsofSpecificationA781/A781Mconstitutesnonconformancewiththisspecification.Incaseofconflict
between the requirements of this specification and Specification A781/A781M, this specification shall prevail.
3.2 Steel investment castings furnished to this specification shall conform to the requirements of Specification A957/A957M,
includinganysupplementaryrequirementsthatareindicatedinthepurchaseorder.Failuretocomplywiththegeneralrequirements
of SpecificationA957/A957M constitutes nonconformance with this specification. In case of conflict between the requirements of
this specification and Specification A957/A957M, A957/A957M shall prevail.
4. Ordering Information
4.1 Orders for material to this specification should include the following:
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.18
on Castings.
Current edition approved JuneMarch 1, 2007.2012. Published July 2007.April 2012. Originally approved in 1977. Last previous edition approved in 20042007 as
A747/A747M – 047. DOI: 10.1520/A0747_A0747M-0712.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. ForAnnualBookofASTMStandards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
www.asme.org.
*A Summary of Changes section appears
...
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:A747/A747M–07 Designation: A747/A747M – 12
Standard Specification for
1
Steel Castings, Stainless, Precipitation Hardening
This standard is issued under the fixed designationA747/A747M; 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 iron-chromium-nickel-copper corrosion-resistant steel castings, capable of being strengthened by
precipitation hardening heat treatment.
1.2 These castings may be used in services requiring corrosion resistance and high strengths at temperatures up to 600°F
[315°C]. They may be machined in the solution-annealed condition and subsequently precipitation hardened to the desired
high-strength mechanical properties specified in Table S14.1 with little danger of cracking or distortion.
1.3 The material is not intended for use in the solution-annealed condition.
NOTE 1—If the service environment in which the material is to be used is considered conducive to stress-corrosion cracking, precipitation hardening
should be performed at a temperature that will minimize the susceptibility of the material to this type of attack.
1.4Supplementary1.4 Supplementary requirements of an optional nature are provided for use at the option of the purchaser.The
Supplementary requirements shall apply only when specified individually by the purchaser in the purchase order or contract.
1.5This1.5 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or
contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply.
1.6 The values stated in either inch-poundSI units or SIinch-pound units are to be regarded separately as standard. Within the
text,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshall
be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.6.1 Within the text, the SI units are shown in brackets.
2. Referenced Documents
2
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
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
3
2.2 ASME Standard:
ASME Boiler and Pressure Vessel Code, Supplementary Requirements S6, S14, and S27
3. General Conditions for Delivery
3.1 Except for investment castings, castings furnished to this specification shall be in accordance with the requirements of
SpecificationA781/A781M, including any supplementary requirements that are indicated in the purchase order. Failure to comply
withthegeneralrequirementsofSpecificationA781/A781Mconstitutesnonconformancewiththisspecification.Incaseofconflict
between the requirements of this specification and Specification A781/A781M, this specification shall prevail.
3.2 Steel investment castings furnished to this specification shall conform to the requirements of Specification A957/A957M,
includinganysupplementaryrequirementsthatareindicatedinthepurchaseorder.Failuretocomplywiththegeneralrequirements
of SpecificationA957/A957M constitutes nonconformance with this specification. In case of conflict between the requirements of
this specification and Specification A957/A957M, A957/A957M shall prevail.
4. Ordering Information
4.1 Orders for material to this specification should include the following:
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.18
on Castings.
Current edition approved JuneMarch 1, 2007.2012. Published July 2007.April 2012. Originally approved in 1977. Last previous edition approved in 20042007 as
A747/A747M – 047. DOI: 10.1520/A0747_A0747M-0712.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. ForAnnualBookofASTMStandards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
www.asme.org.
*A Summary of Changes section appears
...
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