ASTM A958-09e1

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 A958-09 - 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/A958M-10 - Standard Specification for Steel Castings, Carbon and Alloy, with Tensile Requirements, Chemical Requirements Similar to Standard Wrought Grades
• Effective Date: 01-Apr-2010

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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.
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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.
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´ NOTE—Section 7.2 and Table 2 were editorially corrected in December 2009.
1. Scope* 3. General Conditions for Delivery
1.1 This specification covers carbon and low-alloy steel 3.1 Material furnished to this specification shall conform to
castings having chemical analyses similar to that of the the requirements of SpecificationA781/A781M, including any
standard wrought grades. supplementary requirements that are indicated in the purchase
1.2 Several classes are covered and are designated by order. Failure to comply with the general requirements of
chemical composition as shown in Table 1. Specification A781/A781M constitutes nonconformance with
1.3 Options for tensile properties are shown in Tables 2 and this specification. In case of conflict between the requirements
3. of this specification and Specification A781/A781M, this
1.4 The values stated in either inch-pound units or SI units specification shall prevail.
are to be regarded separately as standard. Within the text, the
4. Ordering Information
SI units are shown in brackets. The values stated in each
system are not exact equivalents; therefore, each system must 4.1 Orders for material under this specification should
include the following information.
be used independently of the other. Combining values from the
two systems may result in nonconformance with the standard. 4.1.1 Quantity,
4.1.2 Specification, including year and date of issue,
2. Referenced Documents
4.1.3 Grade and class of steel,
2
2.1 ASTM Standards: 4.1.4 Description of the casting by pattern number or
A370 Test Methods and Definitions for Mechanical Testing drawing (Dimensional tolerances should be included on the
of Steel Products casting drawing.),
A488/A488M Practice for Steel Castings, Welding, Quali- 4.1.5 Options in the specification, and
fications of Procedures and Personnel 4.1.6 Supplementary requirements desired, including stan-
A781/A781M Specification for Castings, Steel and Alloy, dards of acceptance.
Common Requirements, for General Industrial Use
5. Heat Treatment
E29 Practice for Using Significant Digits in Test Data to
5.1 All castings shall receive a heat treatment indicated in
Determine Conformance with Specifications
Table 4. Preliminary heat treatment prior to final heat treatment
as well as multiple tempering is permitted.
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
5.2 Heat treatment shall be performed after the castings
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
have been allowed to cool below the transformation range.
A01.18 on Castings.
5.3 The furnace temperature for heat treating shall be
Current edition approved Oct. 1, 2009. Published October 2009. Originally
effectively controlled by the use of recording-type pyrometers.
approved in 1996. Last previous edition approved in 2006 as A958 – 00 (2006).
DOI: 10.1520/A0958-09.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6. Chemical Composition
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
6.1 The steel shall conform to the requirements of chemical
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. composition as prescribed in Table 1.
*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.
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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 862
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