ASTM A958-09

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 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 are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.

General Information

• Status: Historical
• Publication Date: 30-Sep-2009
• ICS: 77.100 - Ferroalloys
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.18 - Castings

Relations

• Replaces: ASTM A958-00(2006) - Standard Specification for Steel Castings, Carbon and Alloy, with Tensile Requirements, Chemical Requirements Similar to Standard Wrought Grades
• Effective Date: 01-Oct-2009
• Replaced By: ASTM A958-09e1 - Standard Specification for Steel Castings, Carbon and Alloy, with Tensile Requirements, Chemical Requirements Similar to Standard Wrought Grades
• Effective Date: 01-Oct-2009

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A958 – 09
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 designation A958; 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* order. Failure to comply with the general requirements of
Specification A781/A781M constitutes nonconformance with
1.1 This specification covers carbon and low-alloy steel
this specification. In case of conflict between the requirements
castings having chemical analyses similar to that of the
of this specification and Specification A781/A781M, this
standard wrought grades.
specification shall prevail.
1.2 Several classes are covered and are designated by
chemical composition as shown in Table 1.
4. Ordering Information
1.3 Options for tensile properties are shown in Tables 2 and
4.1 Orders for material under this specification should
3.
include the following information.
1.4 The values stated in either inch-pound units or SI units
4.1.1 Quantity,
are to be regarded separately as standard. Within the text, the
4.1.2 Specification, including year and date of issue,
SI units are shown in brackets. The values stated in each
4.1.3 Grade and class of steel,
system are not exact equivalents; therefore, each system must
4.1.4 Description of the casting by pattern number or
be used independently of the other. Combining values from the
drawing (Dimensional tolerances should be included on the
two systems may result in nonconformance with the standard.
casting drawing.),
2. Referenced Documents 4.1.5 Options in the specification, and
2
4.1.6 Supplementary requirements desired, including stan-
2.1 ASTM Standards:
dards of acceptance.
A370 Test Methods and Definitions for Mechanical Testing
of Steel Products
5. Heat Treatment
A488/A488M Practice for Steel Castings, Welding, Quali-
5.1 All castings shall receive a heat treatment indicated in
fications of Procedures and Personnel
Table 4. Preliminary heat treatment prior to final heat treatment
A781/A781M Specification for Castings, Steel and Alloy,
as well as multiple tempering is permitted.
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
3. General Conditions for Delivery effectively controlled by the use of recording-type pyrometers.
3.1 Material furnished to this specification shall conform to
6. Chemical Composition
the requirements of SpecificationA781/A781M, including any
6.1 The steel shall conform to the requirements of chemical
supplementary requirements that are indicated in the purchase
composition as prescribed in Table 1.
6.2 The product analysis tolerances given in Specification
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
A781/A781M shall apply to all product analyses performed on
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
castings supplied to this specification.
A01.18 on Castings.
Current edition approved Oct. 1, 2009. Published October 2009. Originally
7. Tensile Requirements
approved in 1996. Last previous edition approved in 2006 as A958 – 00 (2006).
DOI: 10.1520/A0958-09.
7.1 One tension test shall be made from each heat and shall
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
conform to the tensile requirements specified for the grade
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
selected in Tables 2 and 3.
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 – 09
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
S
...

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:A958–00 (Reapproved 2006) Designation: A958 – 09
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 designation A958; 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 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.
1.4The1.4 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 are not exact equivalents; therefore, each system must be used
independently of the other. Combining values from the two systems may result in nonconformance with the specification.
Inch-pound units are applicable for material ordered to Specification A958 and SI units for material ordered to Specification A958.
standard.
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 March 1, 2006. Published March 2006. Originally approved in 1996. Last previous edition approved in 2000 as A958–00. DOI:
10.1520/A0958-00R06.
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.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM 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 – 09
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 0.23/0.28 0.60/1.
...