ASTM A990/A990M-18
(Specification)Standard Specification for Castings, Iron-Nickel-Chromium and Nickel Alloys, Specially Controlled for Pressure-Retaining Parts for Corrosive Service
Standard Specification for Castings, Iron-Nickel-Chromium and Nickel Alloys, Specially Controlled for Pressure-Retaining Parts for Corrosive Service
ABSTRACT
This specification covers iron-nickel-chromium and nickel alloy castings specially processed with restricted melt practices, weldability testing, and nondestructive examination (NDE) requirements for use in pressure retaining parts with corrosive service environments. The choice of manufacturing procedure to be used for producing the alloy castings shall be according to specified metallic contents. Materials shall conform to specified chemical composition and tensile property requirements, and weldability qualifications. Nondestructive examination requirements such as casting thickness shall be evaluated by visual, radiographic, and liquid penetrant inspection. Castings shall be repair welded and solution heat treated prior to final cleaning by blasting, and shall not be peened, plugged, or impregnated.
SCOPE
1.1 This specification covers iron-nickel-chromium and nickel alloy castings specially processed with restricted melt practices, weldability testing, and nondestructive examination (NDE) requirements.
1.2 A number of grades of iron-nickel-chromium and nickel alloy castings are included in this specification. Since these grades possess varying degrees of suitability for service in corrosive environments, it is the responsibility of the purchaser to determine which grade shall be furnished. Selection will depend on design and service conditions, mechanical properties, and corrosion-resistant characteristics.
1.3 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.
1.3.1 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. Within the text, the SI units are shown in brackets or parentheses.
1.4 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.
1.5 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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Designation:A990/A990M −18
Standard Specification for
Castings, Iron-Nickel-Chromium and Nickel Alloys, Specially
Controlled for Pressure-Retaining Parts for Corrosive
1
Service
This standard is issued under the fixed designationA990/A990M; 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-nickel-chromium and
2.1 ASTM Standards:
nickel alloy castings specially processed with restricted melt
A351/A351M Specification for Castings, Austenitic, for
practices, weldability testing, and nondestructive examination
Pressure-Containing Parts
(NDE) requirements.
A488/A488M Practice for Steel Castings, Welding, Qualifi-
1.2 Anumber of grades of iron-nickel-chromium and nickel
cations of Procedures and Personnel
alloy castings are included in this specification. Since these
A494/A494M Specification for Castings, Nickel and Nickel
grades possess varying degrees of suitability for service in
Alloy
corrosive environments, it is the responsibility of the purchaser
A703/A703M Specification for Steel Castings, General
to determine which grade shall be furnished. Selection will
Requirements, for Pressure-Containing Parts
depend on design and service conditions, mechanical
A743/A743M Specification for Castings, Iron-Chromium,
properties, and corrosion-resistant characteristics.
Iron-Chromium-Nickel, Corrosion Resistant, for General
1.3 The values stated in either SI units or inch-pound units Application
are to be regarded separately as standard. The values stated in
A744/A744M Specification for Castings, Iron-Chromium-
each system may not be exact equivalents; therefore, each
Nickel, Corrosion Resistant, for Severe Service
system shall be used independently of the other. Combining
A802/A802M Practice for Steel Castings, Surface Accep-
values from the two systems may result in nonconformance
tance Standards, Visual Examination
with the standard.
A903/A903M Specification for Steel Castings, Surface Ac-
1.3.1 This specification is expressed in both inch-pound
ceptance Standards, Magnetic Particle and Liquid Pen-
units and in SI units; however, unless the purchase order or
etrant Inspection
contract specifies the applicable M-specification designation
A985/A985M Specification for Steel Investment Castings
(SI units), the inch-pound units shall apply.Within the text, the
General Requirements, for Pressure-Containing Parts
SI units are shown in brackets or parentheses.
E94/E94M Guide for Radiographic Examination Using In-
1.4 This standard does not purport to address all of the
dustrial Radiographic Film
safety concerns, if any, associated with its use. It is the
E165/E165M Practice for Liquid Penetrant Examination for
responsibility of the user of this standard to establish appro-
General Industry
priate safety, health, and environmental practices and deter-
1
E186 Reference Radiographs for Heavy-Walled (2 to 4 ⁄2 in.
mine the applicability of regulatory limitations prior to use.
(50.8 to 114 mm)) Steel Castings
1.5 This international standard was developed in accor-
E272 Reference Radiographs for High-Strength Copper-
dance with internationally recognized principles on standard-
Base and Nickel-Copper Alloy Castings
ization established in the Decision on Principles for the
1
E280 Reference Radiographs for Heavy-Walled (4 ⁄2 to 12
Development of International Standards, Guides and Recom-
in. (114 to 305 mm)) Steel Castings
mendations issued by the World Trade Organization Technical
E446 Reference Radiographs for Steel Castings Up to 2 in.
Barriers to Trade (TBT) Committee.
(50.8 mm) in Thickness
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, 2018. Published May 2018. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1998. Last previous edition approved in 2014 as A990/A990M – 14a. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/A0990_A0990M-18. 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
1
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A990/A990M−18
3
2.2 AWS Standards: are indicated in the purchase order. Failure to comply with the
AWS A5.4 Specification for Stainless Steel Electr
...
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: A990/A990M − 14a A990/A990M − 18
Standard Specification for
Castings, Iron-Nickel-Chromium and Nickel Alloys, Specially
Controlled for Pressure Retaining Pressure-Retaining Parts
1
for Corrosive Service
This standard is issued under the fixed designation A990/A990M; 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-nickel-chromium and nickel alloy castings specially processed with restricted melt practices,
weldability testing, and nondestructive examination (NDE) requirements.
1.2 A number of grades of iron-nickel-chromium and nickel alloy castings are included in this specification. Since these grades
possess varying degrees of suitability for service in corrosive environments, it is the responsibility of the purchaser to determine
which grade shall be furnished. Selection will depend on design and service conditions, mechanical properties, and
corrosion-resistant characteristics.
1.3 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-conformancenonconformance with the standard.
1.3.1 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 M-specification designation (SI units), the inch-pound units shall apply. Within the text,
the SI units are shown in brackets or parentheses.
1.4 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 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:
A351/A351M Specification for Castings, Austenitic, for Pressure-Containing Parts
A488/A488M Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
A494/A494M Specification for Castings, Nickel and Nickel Alloy
A703/A703M Specification for Steel Castings, General Requirements, for Pressure-Containing Parts
A743/A743M Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application
A744/A744M Specification for Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service
A802/A802M Practice for Steel Castings, Surface Acceptance Standards, Visual Examination
A903/A903M Specification for Steel Castings, Surface Acceptance Standards, Magnetic Particle and Liquid Penetrant
Inspection
A985/A985M Specification for Steel Investment Castings General Requirements, for Pressure-Containing Parts
E94E94/E94M Guide for Radiographic Examination Using Industrial Radiographic Film
E165E165/E165M Practice for Liquid Penetrant Examination for General Industry
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 Oct. 1, 2014May 1, 2018. Published November 2014May 2018. Originally approved in 1998. Last previous edition approved in 2014 as
A990/A990M – 14.A990/A990M – 14a. DOI: 10.1520/A0990_A0990M-14A.10.1520/A0990_A0990M-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on 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
1
---------------------- Page: 1 ----------------------
A990/A990M − 18
1
E186 Reference Radiographs for Heavy-Walled (2 to 4 ⁄2 in. (50.8 to 114 m
...
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