ASTM A985/A985M-21
(Specification)Standard Specification for Steel Investment Castings General Requirements, for Pressure-Containing Parts
Standard Specification for Steel Investment Castings General Requirements, for Pressure-Containing Parts
ABSTRACT
This specification covers a group of common requirements that are mandatory for steel castings produced by the investment casting process for pressure-containing parts. Master heats shall be made by the electric furnace process with or without separate refining such as argon-oxygen-decarburization (AOD), vacuum-oxygen degassing (VOD), vacuum-induction-melting (VIM). Ferritic and martensitic steel shall be cooled after pouring to provide complete transformation of austenite prior to heat treatment to enhance mechanical properties. Chemical, heat, and product analyses shall be performed and the chemical composition thus determined shall conform to the prescribed values in carbon, manganese, silicon, phosphorus, sulfur, nickel, chromium, molybdenum, vanadium, tungsten, copper, and aluminum. Tensile testing shall be done on the castings and shall meet the required yield and tensile strength, elongation, and reduction of area. Each casting shall also be tested after machining to hydrostatic shell pressure test and shall not show any leaks.
SCOPE
1.1 This specification covers a group of common requirements that are mandatory for steel castings produced by the investment casting process for pressure-containing parts under each of the following ASTM Specifications:
Title of Specification
ASTM Designation
Steel Castings, Carbon, Suitable for Fusion Welding,
A216/A216M
for High-Temperature Service
Steel Castings, Martensitic Stainless and Alloy, for
A217/A217M
Pressure-Containing Parts, Suitable for High-
Temperature Service
Castings, Austenitic, for Pressure-Containing
A351/A351M
Parts
Steel Castings, Ferritic and Martensitic, for Pressure-
A352/A352M
Containing Parts, Suitable for Low-Temperature
Service
Steel Castings, Alloy, Specially Heat-Treated, for
A389/A389M
Pressure-Containing Parts, Suitable for High-
Temperature Service
Steel Castings Suitable for Pressure Service
A487/A487M
Castings, Iron-Nickel-Chromium and Nickel Alloys, Spe-
cially Controlled for Pressure-Retaining Parts for
Corrosive Service
A990/A990M
Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for
Pressure-Containing Parts
A995/A995M
1.2 This specification also covers a group of supplementary requirements, which may be applied to the above specifications as indicated therein. These requirements 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 casting is ordered, 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 nonconformance with the standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 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.
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Standards Content (Sample)
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:A985/A985M −21
Standard Specification for
Steel Investment Castings General Requirements, for
1
Pressure-Containing Parts
This standard is issued under the fixed designationA985/A985M; 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* 1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This specification covers a group of common require-
responsibility of the user of this standard to establish appro-
ments that are mandatory for steel castings produced by the
priate safety, health, and environmental practices and deter-
investment casting process for pressure-containing parts under
mine the applicability of regulatory limitations prior to use.
each of the following ASTM Specifications:
1.6 This international standard was developed in accor-
Title of Specification ASTM Designation
dance with internationally recognized principles on standard-
Steel Castings, Carbon, Suitable for Fusion Welding, A216/A216M ization established in the Decision on Principles for the
for High-Temperature Service
Development of International Standards, Guides and Recom-
Steel Castings, Martensitic Stainless and Alloy, for A217/A217M
mendations issued by the World Trade Organization Technical
Pressure-Containing Parts, Suitable for High-
Temperature Service Barriers to Trade (TBT) Committee.
Castings, Austenitic, for Pressure-Containing A351/A351M
Parts
2. Referenced Documents
Steel Castings, Ferritic and Martensitic, for Pressure- A352/A352M
2
Containing Parts, Suitable for Low-Temperature
2.1 ASTM Standards:
Service
A216/A216M SpecificationforSteelCastings,Carbon,Suit-
Steel Castings, Alloy, Specially Heat-Treated, for A389/A389M
able for Fusion Welding, for High-Temperature Service
Pressure-Containing Parts, Suitable for High-
Temperature Service
A217/A217M Specification for Steel Castings, Martensitic
Steel Castings Suitable for Pressure Service A487/A487M
Stainless and Alloy, for Pressure-Containing Parts, Suit-
Castings, Iron-Nickel-Chromium and Nickel Alloys, Spe- A990/A990M
able for High-Temperature Service
cially Controlled for Pressure-Retaining Parts for
Corrosive Service
A351/A351M Specification for Castings, Austenitic, for
Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for A995/A995M
Pressure-Containing Parts
Pressure-Containing Parts
A352/A352M Specification for Steel Castings, Ferritic and
1.2 This specification also covers a group of supplementary
Martensitic, for Pressure-Containing Parts, Suitable for
requirements,whichmaybeappliedtotheabovespecifications
Low-Temperature Service
as indicated therein. These requirements are provided for use
A370 Test Methods and Definitions for Mechanical Testing
when additional testing or inspection is desired, and apply only
of Steel Products
when specified individually by the purchaser in the order.
A380/A380M Practice for Cleaning, Descaling, and Passi-
1.3 Wheninvestmentcastingisordered,therequirementsof
vation of Stainless Steel Parts, Equipment, and Systems
this specification shall take precedence over the individual
A389/A389M Specification for Steel Castings, Alloy, Spe-
material specification requirements.
cially Heat Treated, for Pressure-Containing Parts, Suit-
able for High-Temperature Service
1.4 The values stated in either SI units or inch-pound units
A487/A487M Specification for Steel Castings Suitable for
are to be regarded separately as standard. The values stated in
Pressure Service
each system may not be exact equivalents; therefore, each
A488/A488M Practice for Steel Castings, Welding, Qualifi-
system shall be used independently of the other. Combining
cations of Procedures and Personnel
values from the two systems may result in nonconformance
A609/A609M Practice for Castings, Carbon, Low-Alloy,
with the standard.
and Martensitic Stainless Steel, Ultrasonic Examination
Thereof
1
This specification is under the jurisdiction ofASTM 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 1998. Last previous edition approved in 2020 as A985/A985M – 20. Standards volume information, refer to the standard’s Document Summary page
...
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: A985/A985M − 20 A985/A985M − 21
Standard Specification for
Steel Investment Castings General Requirements, for
1
Pressure-Containing Parts
This standard is issued under the fixed designation A985/A985M; 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 a group of common requirements that are mandatory for steel castings produced by the investment
casting process for pressure-containing parts under each of the following ASTM Specifications:
Title of Specification ASTM Designation
Steel Castings, Carbon, Suitable for Fusion Welding, A216/A216M
for High-Temperature Service
Steel Castings, Martensitic Stainless and Alloy, for A217/A217M
Pressure-Containing Parts, Suitable for High-
Temperature Service
Castings, Austenitic, for Pressure-Containing A351/A351M
Parts
Steel Castings, Ferritic and Martensitic, for Pressure- A352/A352M
Containing Parts, Suitable for Low-Temperature
Service
Steel Castings, Alloy, Specially Heat-Treated, for A389/A389M
Pressure-Containing Parts, Suitable for High-
Temperature Service
Steel Castings Suitable for Pressure Service A487/A487M
Castings, Iron-Nickel-Chromium and Nickel Alloys, Spe- A990/A990M
cially Controlled for Pressure-Retaining Parts for
Corrosive Service
Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for A995/A995M
Pressure-Containing Parts
1.2 This specification also covers a group of supplementary requirements, which may be applied to the above specifications as
indicated therein. These requirements 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 casting is ordered, 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 nonconformance with the standard.
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 July 1, 2020May 1, 2021. Published August 2020May 2021. Originally approved in 1998. Last previous edition approved in 20192020 as
A985/A985M – 19.A985/A985M – 20. DOI: 10.1520/A0985_A0985M-20.10.1520/A0985_A0985M-21.
*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
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A985/A985M − 21
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.6 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:
A216/A216M Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature Service
A217/A217M Specification for Steel Castings, Martensitic Stainless and Alloy, for Pressure-Containing Parts, Suitable for
High-Temperature Service
A351/A351M Specification for Castings, Austenitic, for Pressure-Containing Parts
A352/A352M Specification for Steel Castings, Ferritic and Martensitic, for Pressure-Containing Parts, Suitable for Low-
Temperature Service
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A380/A380M Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems
A389/A389M Specification for Steel Castings, Alloy, Specially Heat Treated, for Pressure-Containing Parts, Suitable for
High-Temperature Service
A487/A487M S
...
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