ASTM A958/A958M-10
(Specification)Standard Specification for Steel Castings, Carbon and Alloy, with Tensile Requirements, Chemical Requirements Similar to Standard Wrought Grades
Standard Specification for Steel Castings, Carbon and Alloy, with Tensile Requirements, Chemical Requirements Similar to Standard Wrought Grades
ABSTRACT
This specification covers carbon and low-alloy steel castings. The steel specimens shall be heat treated and shall conform to the required values of austenitizing temperature and tempering temperature. The steel materials shall conform to the required chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, and molybdenum. Tensile tests shall be performed and the steel specimens shall conform to the required values of tensile strength, yield strength, and elongation.
SCOPE
1.1 This specification covers carbon and low-alloy steel castings having chemical analyses similar to that of the standard wrought grades.
1.2 Several classes are covered and are designated by chemical composition as shown in Table 1.
1.3 Options for tensile properties are shown in Tables 2 and 3.
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 non-conformance with the standard.
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Designation:A958/A958M −10
StandardSpecification for
Steel Castings, Carbon and Alloy, with Tensile
Requirements, Chemical Requirements Similar to Standard
1
Wrought Grades
This standard is issued under the fixed designationA958/A958M; 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* supplementary requirements that are indicated in the purchase
order. Failure to comply with the general requirements of
1.1 This specification covers carbon and low-alloy steel
Specification A781/A781M constitutes nonconformance with
castings having chemical analyses similar to that of the
this specification. In case of conflict between the requirements
standard wrought grades.
of this specification and Specification A781/A781M, this
1.2 Several classes are covered and are designated by
specification shall prevail.
chemical composition as shown in Table 1.
4. Ordering Information
1.3 Options for tensile properties are shown in Tables 2 and
3.
4.1 Orders for material under this specification should
include the following information.
1.4 The values stated in either SI units or inch-pound units
4.1.1 Quantity,
are to be regarded separately as standard. The values stated in
4.1.2 Specification, including year and date of issue,
each system may not be exact equivalents; therefore, each
4.1.3 Grade and class of steel,
system shall be used independently of the other. Combining
4.1.4 Description of the casting by pattern number or
values from the two systems may result in non-conformance
drawing (Dimensional tolerances should be included on the
with the standard.
casting drawing.),
1.4.1 Within the text, the SI units are shown in brackets.
4.1.5 Options in the specification, and
4.1.6 Supplementary requirements desired, including stan-
2. Referenced Documents
dards of acceptance.
2
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing
5. Heat Treatment
of Steel Products
5.1 All castings shall receive a heat treatment indicated in
A488/A488M Practice for Steel Castings, Welding, Qualifi-
Table4.Preliminaryheattreatmentpriortofinalheattreatment
cations of Procedures and Personnel
as well as multiple tempering is permitted.
A781/A781M Specification for Castings, Steel and Alloy,
Common Requirements, for General Industrial Use 5.2 Heat treatment shall be performed after the castings
E29 Practice for Using Significant Digits in Test Data to
have been allowed to cool below the transformation range.
Determine Conformance with Specifications
5.3 The furnace temperature for heat treating shall be
effectively controlled by the use of recording-type pyrometers.
3. General Conditions for Delivery
3.1 Material furnished to this specification shall conform to 6. Chemical Composition
the requirements of Specification A781/A781M, including any
6.1 The steel shall conform to the requirements of chemical
composition as prescribed in Table 1.
1
6.2 The product analysis tolerances given in Specification
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A781/A781M shall apply to all product analyses performed on
A01.18 on Castings.
castings supplied to this specification.
Current edition approved April 1, 2010. Published April 2010. Originally
ϵ1
approved in 1996. Last previous edition approved in 2009 as A958 – 09 . DOI:
7. Tensile Requirements
10.1520/A0958_A0958M-10.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.1 One tension test shall be made from each heat and shall
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
conform to the tensile requirements specified for the grade
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. selected in Tables 2 and 3.
*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 ----------------------
A958/A958M−10
TABLE 1 Chemical Composition, Weight Percent
NOTE 1—Values are maximum unless a range is given.
Grade C Mn P S Si Ni Cr Mo
SC 1020 0.18/0.23 0.40/0.80 0.040 0.040 0.30/0.60 - - -
SC 1025 0.22/0.28 0.40/0.80 0.040 0.040 0.30/0.60 - - -
SC 1030 0.28/0.34 0.50/0.90 0.040 0.040 0.30/0.60 - - -
SC 1040 0.37/0.44 0.50/0.90 0.040 0.040 0.30/0.60 - - -
SC 1045 0.43/0.50 0.50/0.90 0.040 0.040 0.30/0.60 - - -
SC 4130 0.28/0.33 0.40/0.80 0.035 0.040 0.30/0.60 - 0.80/1.10 0.15/0.25
SC 4140 0.38/0.43 0.70/1.10 0.035 0.040 0.30/0.60 - 0.80/1
...
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.
´1
Designation:A958–09 Designation: A958/A958M – 10
Standard Specification for
Steel Castings, Carbon and Alloy, with Tensile
Requirements, Chemical Requirements Similar to Standard
1
Wrought Grades
This standard is issued under the fixed designationA958/A958M; 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.
1
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval. ´ NOTE—Section 7.2 and Table 2 were
editorially corrected in December 2009.
1. Scope*
1.1 This specification covers carbon and low-alloy steel castings having chemical analyses similar to that of the standard
wrought grades.
1.2 Several classes are covered and are designated by chemical composition as shown in Table 1.
1.3 Options for tensile properties are shown in Tables 2 and 3.
1.4 The values stated in either inch-poundSI units or SIinch-pound units are to be regarded separately as standard. Within the
text, the SI units are shown in brackets. The values stated in each system aremay not be exact equivalents; therefore, each system
mustshall be used independently of the other. Combining values from the two systems may result in non-conformance with the
standard.
1.4.1 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
A488/A488M Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
A781/A781M Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
3. General Conditions for Delivery
3.1 Material furnished to this specification shall conform to the requirements of Specification A781/A781M, including any
supplementary requirements that are indicated in the purchase order. Failure to comply with the general requirements of
SpecificationA781/A781Mconstitutesnonconformancewiththisspecification.Incaseofconflictbetweentherequirementsofthis
specification and Specification A781/A781M, this specification shall prevail.
4. Ordering Information
4.1 Orders for material under this specification should include the following information.
4.1.1 Quantity,
4.1.2 Specification, including year and date of issue,
4.1.3 Grade and class of steel,
4.1.4 Description of the casting by pattern number or drawing (Dimensional tolerances should be included on the casting
drawing.),
4.1.5 Options in the specification, and
4.1.6 Supplementary requirements desired, including standards of acceptance.
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. 1, 2009. Published October 2009. Originally approved in 1996. Last previous edition approved in 2006 as A958–00 (2006). DOI:
10.1520/A0958-09.
´1
Current edition approved April 1, 2010. Published April 2010. Originally approved in 1996. Last previous edition approved in 2009 as A958 – 09 . DOI:
10.1520/A0958_A0958M-10.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*ASummary 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 ----------------------
A958/A958M – 10
TABLE 1 Chemical Composition, Weight Percent
NOTE 1—Values are maximum unless a range is given.
Grade C Mn P S Si Ni Cr Mo
SC 1020 0.18/0.23 0.40/0.80 0.040 0.040 0.30/0.60 - - -
SC 1025 0.22/0.28 0.40/0.80 0.040 0.040 0.30/0.60 - - -
SC 1030 0.28/0.34 0.50/0.90 0.040 0.040 0.30/0.60 - - -
SC 1040 0.37/0.44 0.50/0.90 0.040 0.040 0.30/0.60 - - -
SC 1045 0.43/0.50 0.50/0.90 0.040 0.040 0.30/0.60 - - -
SC 4130 0.28/0.33 0.40/0.80 0.035 0.040 0.30/0.60 - 0.80/1.10 0.15/0.25
SC 4140 0.38/0.43 0.70/1.10 0.035 0.040 0.30/0.60 - 0.80/1.10 0.15/0.25
SC 4330 0.28/0.33 0.60/0.90 0.035 0.040 0.30/0.60 1.65/2.00 0.70/0.90 0.20/0.30
SC 4340 0.38/0.43 0.60/0.90 0.035 0.040 0.30/0.60 1.65/2.00 0.70/0.90 0.20/0.30
SC 8620 0.18/0.23 0.60/1.00 0.035 0.040 0.30/0.60 0.40/0.70 0.40/0.60 0.15/0.25
SC 8625
...
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