ASTM A990-11
(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 non-conformance 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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:A990 −11
StandardSpecification 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 designation A990; 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
2.1 ASTM Standards:
1.1 This specification covers iron-nickel-chromium and
A351/A351M Specification for Castings, Austenitic, for
nickel alloy castings specially processed with restricted melt
Pressure-Containing Parts
practices, weldability testing, and nondestructive examination
A370 Test Methods and Definitions for Mechanical Testing
(NDE) requirements.
of Steel Products
1.2 Anumber of grades of iron-nickel-chromium and nickel
A488/A488M Practice for Steel Castings, Welding, Qualifi-
alloy castings are included in this specification. Since these
cations of Procedures and Personnel
grades possess varying degrees of suitability for service in
A494/A494M Specification for Castings, Nickel and Nickel
corrosive environments, it is the responsibility of the purchaser Alloy
to determine which grade shall be furnished. Selection will A703/A703M Specification for Steel Castings, General
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 non-conformance
tance Standards, Visual Examination
with the standard.
A903/A903M Specification for Steel Castings, Surface Ac-
ceptance Standards, Magnetic Particle and Liquid Pen-
1.3.1 This specification is expressed in both inch-pound
etrant Inspection
units and in SI units; however, unless the purchase order or
A941 TerminologyRelatingtoSteel,StainlessSteel,Related
contract specifies the applicable M specification designation
Alloys, and Ferroalloys
(SI units), the inch-pound units shall apply.Within the text, the
A985/A985M Specification for Steel Investment Castings
SI units are shown in brackets or parentheses.
General Requirements, for Pressure-Containing Parts
1.4 This standard does not purport to address all of the
E94 Guide for Radiographic Examination
safety concerns, if any, associated with its use. It is the
E165 Practice for Liquid Penetrant Examination for General
responsibility of the user of this standard to establish appro-
Industry
priate safety and health practices and determine the applica- 1
E186 Reference Radiographs for Heavy-Walled (2 to 4 ⁄2-in.
bility of regulatory limitations prior to use.
(50.8 to 114-mm)) Steel Castings
E272 Reference Radiographs for High-Strength Copper-
Base and Nickel-Copper Alloy Castings
1
E280 Reference Radiographs for Heavy-Walled (4 ⁄2 to 12-
in. (114 to 305-mm)) Steel Castings
E446 Reference Radiographs for Steel Castings Up to 2 in.
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
2
A01.18 on Castings. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2011. Published June 2011. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1998. Last previous edition approved in 2010 as A990 – 10a. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/A0990-11. 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 ----------------------
A990−11
(50.8 mm) in Thickness case of conflict between the requirements of this specification
3
and Specification A703/A703M, this specification shall pre-
2.2 AWS Standards:
vail.
AWS A5.4, Specification for Stainless Steel Electrodes for
Shielded Metal Arc Welding
4.2 Investment Castings – Material furnished to this speci-
AWS A5.9, Specification for Bare Stainless Steel Welding
fication shall conform to the requirements of Specific
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:A990–10a Designation: A990 – 11
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 designation A990; 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 (ϵ) 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 Anumber 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-conformance 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
A351/A351M Specification for Castings, Austenitic, for Pressure-Containing Parts
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
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 Applica-
tion
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
A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
A985/A985M Specification for Steel Investment Castings General Requirements, for Pressure-Containing Parts
E94 Guide for Radiographic Examination
E165 Practice for Liquid Penetrant Examination for General Industry
E186 Reference Radiographs for Heavy-Walled (2 to 412-in. (50.8 to 114-mm)) Steel Castings
E272 Reference Radiographs for High-Strength Copper-Base and Nickel-Copper Alloy Castings
E280 Reference Radiographs for Heavy-Walled (412 to 12-in. (114 to 305-mm)) Steel Castings
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 Oct.May 1, 2010.2011. Published November 2010.June 2011. Originally approved in 1998. Last previous edition approved in 2010 as
A990 – 10a. DOI: 10.1520/A0990-10A.10.1520/A0990-11.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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 – 11
E446 Reference Radiographs for Steel Castings Up to 2 in. (50.8 mm) in Thickness
3
2.2 AWS Standards:
AWS A5.4, Specification for Stainless Steel Electrode
...
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