ASTM A990-08
(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 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. The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. 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.
1.4 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 – 08
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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* A370 Test Methods and Definitions for Mechanical Testing
of Steel Products
1.1 This specification covers iron-nickel-chromium and
A488/A488M Practice for Steel Castings, Welding, Quali-
nickel alloy castings specially processed with restricted melt
fications of Procedures and Personnel
practices, weldability testing, and nondestructive examination
A494/A494M Specification for Castings, Nickel and Nickel
(NDE) requirements.
Alloy
1.2 Anumber of grades of iron-nickel-chromium and nickel
A703/A703M Specification for Steel Castings, General Re-
alloy castings are included in this specification. Since these
quirements, for Pressure-Containing Parts
grades possess varying degrees of suitability for service in
A743/A743M Specification for Castings, Iron-Chromium,
corrosive environments, it is the responsibility of the purchaser
Iron-Chromium-Nickel, Corrosion Resistant, for General
to determine which grade shall be furnished. Selection will
Application
depend on design and service conditions, mechanical proper-
A744/A744M Specification for Castings, Iron-Chromium-
ties, and corrosion-resistant characteristics.
Nickel, Corrosion Resistant, for Severe Service
1.3 This specification is expressed in both inch-pound units
A802/A802M Practice for Steel Castings, Surface Accep-
and in SI units; however, unless the purchase order or contract
tance Standards, Visual Examination
specifies the applicable M specification designation (SI units),
A903/A903M Specification for Steel Castings, Surface Ac-
the inch-pound units shall apply. The values stated in either
ceptance Standards, Magnetic Particle and Liquid Pen-
inch-pound units or SI units are to be regarded separately as
etrant Inspection
standard. Within the text, the SI units are shown in brackets.
A941 Terminology Relating to Steel, Stainless Steel, Re-
The values stated in each system may not be exact equivalents;
lated Alloys, and Ferroalloys
therefore,eachsystemshallbeusedindependentlyoftheother.
A985/A985M Specification for Steel Investment Castings
Combining values from the two systems may result in noncon-
General Requirements, for Pressure-Containing Parts
formance with the standard.
E94 Guide for Radiographic Examination
1.4 This standard does not purport to address all of the
E165 PracticeforLiquidPenetrantExaminationforGeneral
safety concerns, if any, associated with its use. It is the
Industry
responsibility of the user of this standard to establish appro-
E186 Reference Radiographs for Heavy-Walled (2 to 412-
priate safety and health practices and determine the applica-
in. [51 to 114-mm]) Steel Castings
bility of regulatory limitations prior to use.
E272 Reference Radiographs for High-Strength Copper-
2. Referenced Documents Base and Nickel-Copper Alloy Castings
2
E280 Reference Radiographs for Heavy-Walled (412 to
2.1 ASTM Standards:
12-in. [114 to 305-mm]) Steel Castings
A351/A351M Specification for Castings, Austenitic, for
E446 Reference Radiographs for Steel Castings Up to 2 in.
Pressure-Containing Parts
[51 mm] in Thickness
3
2.2 AWS Standards:
1 AWS A5.4, Specification for Stainless Steel Electrodes for
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee Shielded Metal Arc Welding
A01.18 on Castings.
AWS A5.9, Specification for Bare Stainless Steel Welding
Current edition approved March 1, 2008. Published March 2008. Originally
Electrodes and Rods
approved in 1998. Last previous edition approved in 2006 as A990 – 06. DOI:
10.1520/A0990-08.
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
3
Standards volume information, refer to the standard’s Document Summary page on Available from American Welding Society (AWS), 550 NW LeJeune Rd.,
the ASTM website. Miami, FL 33126, http://www.aws.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
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A990 – 08
AWS A5.11, Specification for Nickel and Nickel Alloy 5. Ordering Information
Electrodes for Shielded Metal Arc Welding
5.1 It is the re
...
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:A990–06 Designation: A 990 – 08
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 A 990; 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 (e) 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 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. The values stated in either
inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. 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.
1.4 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:
A 351/A 351M Specification for Castings, Austenitic, for Pressure-Containing Parts
A 370 Test Methods and Definitions for Mechanical Testing of Steel Products
A 488/A 488M Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
A 494/A 494M Specification for Castings, Nickel and Nickel Alloy
A 703/A 703M Specification for Steel Castings, General Requirements, for Pressure-Containing Parts
A 743/A 743M Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Applica-
tion
A 744/A 744M Specification for Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe Service
A 802/A 802M Practice for Steel Castings, Surface Acceptance Standards, Visual Examination
A 903/A 903M Specification for Steel Castings, Surface Acceptance Standards, Magnetic Particle and Liquid Penetrant
Inspection
A 941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys
A 985/A 985M Specification for Steel Investment Castings General Requirements, for Pressure-Containing Parts
E 94 Guide for Radiographic Examination
E 165 Test Method for Liquid Penetrant Examination
E 186 Reference Radiographs for Heavy-Walled (2 to 412-in. [51 to 114-mm]) Steel Castings
E 272 Reference Radiographs for High-Strength Copper-Base and Nickel-Copper Alloy Castings
E 280 Reference Radiographs for Heavy-Walled (412 to 12-in. [114 to 305-mm]) Steel Castings
E 446 Reference Radiographs for Steel Castings Up to 2 in. [51 mm] in Thickness
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 Sept.March 1, 2006.2008. Published September 2006.March 2008. Originally approved in 1998. Last previous edition approved in 20052006
as A990–05.A 990 – 06.
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 ----------------------
A990–08
3
2.2 AWS Standards:
AWS A5.4, Specification for Stainless Steel Electrodes for Shielded Metal Arc Welding
AWS A5.9
...
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