ASTM A148/A148M-08

Standard Specification for Steel Castings, High Strength, for Structural Purposes

ABSTRACT
This specification covers the standard for carbon steel, alloy steel, and martensitic stainless steel castings that are to be subjected to higher mechanical stresses. All castings shall undergo heat treatment either by full annealing, normalizing, normalizing and tempering, or quenching and tempering and shall be regulated under pyrometers. Several grades of steel castings are covered and shall conform to the required chemical composition for sulfur and phosphorus. A tension test shall be performed and shall conform to the required tensile strength, yield point, and elongation. The notch bar impact properties shall also be determined by testing one set of three Charpy V-notch impact specimens.
SCOPE
1.1 This specification covers carbon steel, alloy steel, and martensitic stainless steel castings that are to be subjected to higher mechanical stresses than those covered in Specification A 27/A 27M.  
1.2 Several grades of steel castings are covered, having the chemical composition and mechanical properties prescribed in Tables 1 and 2.  
1.3 The values stated in 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.

General Information

• Status: Historical
• Publication Date: 29-Feb-2008
• ICS: 77.140.80 - Iron and steel castings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.18 - Castings

Relations

• Replaces: ASTM A148/A148M-05 - Standard Specification for Steel Castings, High Strength, for Structural Purposes
• Effective Date: 01-Mar-2008
• Replaced By: ASTM A148/A148M-14 - Standard Specification for Steel Castings, High Strength, for Structural Purposes
• Effective Date: 15-Nov-2014
• Referred By: ASTM A488/A488M-18e2 - Standard Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
• Effective Date: 01-Mar-2008
• Referred By: ASTM A957/A957M-21 - Standard Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
• Effective Date: 01-Mar-2008
• Referred By: ASTM F1106-87(2023) - Standard Specification for Warping Heads, Rope Handling (Gypsy Head, Capstan Head)
• Effective Date: 01-Mar-2008
• Referred By: ASTM F765-93(2022) - Standard Specification for Wildcats, Ship Anchor Chain
• Effective Date: 01-Mar-2008
• Referred By: ASTM A781/A781M-21 - Standard Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use
• Effective Date: 01-Mar-2008

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:A148/A148M −08
StandardSpecification for
1
Steel Castings, High Strength, for Structural Purposes
This standard is issued under the fixed designationA148/A148M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* this specification. In case of conflict between the requirements
of this specification and Specification A781/A781M, this
1.1 This specification covers carbon steel, alloy steel, and
specification shall prevail.
martensitic stainless steel castings that are to be subjected to
higher mechanical stresses than those covered in Specification
4. Ordering Information
A27/A27M.
4.1 The inquiry and order should include or indicate the
1.2 Several grades of steel castings are covered, having the
following:
chemical composition and mechanical properties prescribed in
4.1.1 A description of the casting by pattern number or
Tables 1 and 2.
drawing (dimensional tolerances shall be included on the
casting drawing),
1.3 The values stated in inch-pound units or SI units are to
beregardedseparatelyasstandard.Withinthetext,theSIunits 4.1.2 Grade of steel,
4.1.3 Options in the specification, and
areshowninbrackets.Thevaluesstatedineachsystemarenot
exact equivalents; therefore, each system must be used inde- 4.1.4 The supplementary requirements desired, including
the standards of acceptance.
pendentlyoftheother.Combiningvaluesfromthetwosystems
may result in nonconformance with the specification.
5. Heat Treatment
2. Referenced Documents
5.1 Allcastingsshallbeheattreatedeitherbyfullannealing,
2
normalizing, normalizing and tempering, or quenching and
2.1 ASTM Standards:
tempering. Unless otherwise specified in the inquiry, contract,
A27/A27MSpecification for Steel Castings, Carbon, for
or order, the castings may be heat treated by any of these heat
General Application
treatmentsorcombinationoftheseheattreatmentsattheoption
A370Test Methods and Definitions for Mechanical Testing
of the manufacturer.
of Steel Products
A781/A781MSpecification for Castings, Steel and Alloy,
5.2 Heat treatment shall be performed after the castings
Common Requirements, for General Industrial Use
have been allowed to cool below the transformation range.
E29Practice for Using Significant Digits in Test Data to
6. Temperature Control
Determine Conformance with Specifications
6.1 Furnacetemperaturesforheat-treatingshallberegulated
3. General Conditions for Delivery
by the use of pyrometers.
3.1 Material furnished to this specification shall conform to
7. Chemical Composition
the requirements of Specification A781/A781M, including any
supplementary requirements that are indicated in the purchase 7.1 The steel shall conform to sulfur and phosphorus re-
order. Failure to comply with the general requirements of
quirements as prescribed in Table 1.
Specification A781/A781M constitutes nonconformance with
7.2 The content of carbon, manganese, silicon, and alloying
elementsmay,byagreement,beprescribedbythepurchaser.If
not specified, the content may be selected by the manufacturer
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
to obtain the required mechanical properties.
Stainless Steel and Related Alloysand is the direct responsibility of Subcommittee
A01.18 on Castings.
7.3 Whentheanalysisofcarbon,manganese,silicon,orany
Current edition approved March 1, 2008. Published March 2008. Originally
intentionally added alloying element is specifically requested
approved in 1955. Last previous edition approved in 2005 as A148/A148M–05.
DOI: 10.1520/A0148_A0148M-08.
in the contract or order, it shall be made by the manufacturer
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and reported to the purchaser. The results of these analyses
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
shall not be used as a basis for rejection except by prior
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. agreement.
*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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A148/A148M−08
TABLE 1 Chemical Requirements
may, at the manufacturer’s option, be reheat treated. Testing
Composition, % after reheat treatment shall consist of the full number of
Grade (UNS No.)
Sulfur, max Phospho- specimens complying with the specification or order.
rus, max
11. Test Coupons and Specimens
80-40 [
...

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:A148/A148M–05 Designation: A 148/A 148M – 08
Standard Specification for
1
Steel Castings, High Strength, for Structural Purposes
ThisstandardisissuedunderthefixeddesignationA148/A148M;thenumberimmediatelyfollowingthedesignationindicatestheyear
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope*
1.1 This specification covers carbon steel, alloy steel, and martensitic stainless steel castings that are to be subjected to higher
mechanical stresses than those covered in Specification A27/A27M.
1.2 Several grades of steel castings are covered, having the chemical composition and mechanical properties prescribed in
Tables 1 and 2.
1.3 The values stated in 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.
2. Referenced Documents
2
2.1 ASTM Standards:
A27/A27M Specification for Steel Castings, Carbon, for General Application
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
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
Specification A781/A781M constitutes nonconformance with this specification. In case of conflict between the requirements of
this specification and Specification A781/A781M, this specification shall prevail.
4. Ordering Information
4.1 The inquiry and order should include or indicate the following:
4.1.1 A description of the casting by pattern number or drawing (dimensional tolerances shall be included on the casting
drawing),
4.1.2 Grade of steel,
4.1.3 Options in the specification, and
4.1.4 The supplementary requirements desired, including the standards of acceptance.
5. Heat Treatment
5.1 All castings shall be heat treated either by full annealing, normalizing, normalizing and tempering, or quenching and
tempering. Unless otherwise specified in the inquiry, contract, or order, the castings may be heat treated by any of these heat
treatments or combination of these heat treatments at the option of the manufacturer.
5.2 Heat treatment shall be performed after the castings have been allowed to cool below the transformation range.
6. Temperature Control
6.1 Furnace temperatures for heat-treating shall be regulated by the use of pyrometers.
1
ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteelandRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.18
on Castings.
Current edition approved MayMarch 1, 2005.2008. Published May 2005.March 2008. Originally approved in 1955. Last previous edition approved in 20032005 as
A148/A148M–035.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,[e-mail] Annual Book ofASTM 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

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A 148/A 148M – 08
TABLE 1 Chemical Requirements
Composition, %
Grade (UNS No.)
Sulfur, max Phospho-
rus, max
80-40 [550-275] (D50400) 0.06 0.05
80-50 [550-345] (D50500) 0.06 0.05
90-60 [620-415] (D50600) 0.06 0.05
105-85 [725-585] (D50850) 0.06 0.05
115-95 [795-655] (D50950) 0.06 0.05
130-115 [895-795] (D51150) 0.06 0.05
135-125 [930-860] (D51250) 0.06 0.05
150-135 [1035-930] (D51350) 0.06 0.05
160-145 [1105-1000] (D51450) 0.06 0.05
165-150 [1140-1035] (D51500) 0.020 0.020
165-150L [1140-1035L] (D51501) 0.020 0.020
210-180 [1450-1240] (D51800) 0.020 0.020
210-180L [1450-1240L] (D51801) 0.020 0.020
260-210 [1795-1450] (D52100) 0.020 0.020
260-210L [1795-1
...