ASTM A148/A148M-93b(1998)

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

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 Table 1 and Table 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: 09-Mar-2001
• ICS: 77.140.80 - Iron and steel castings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.18 - Castings

Relations

• Replaced By: ASTM A148/A148M-01 - Standard Specification for Steel Castings, High Strength, for Structural Purposes
• Effective Date: 10-Mar-2001
• Referred By: ASTM A488/A488M-18e2 - Standard Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel
• Effective Date: 10-Mar-2001
• Referred By: ASTM A957/A957M-21 - Standard Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
• Effective Date: 10-Mar-2001
• Referred By: ASTM A781/A781M-21 - Standard Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use
• Effective Date: 10-Mar-2001
• Referred By: ASTM F1106-87(2023) - Standard Specification for Warping Heads, Rope Handling (Gypsy Head, Capstan Head)
• Effective Date: 10-Mar-2001
• Referred By: ASTM F765-93(2022) - Standard Specification for Wildcats, Ship Anchor Chain
• Effective Date: 10-Mar-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
An American National Standard
Designation: A 148/A148M – 93b (Reapproved 1998)
Standard Specification for
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 (ϵ) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
TABLE 1 Chemical Requirements
1. Scope
1.1 This specification covers carbon steel and alloy steel
Grade Composition, %
castings that are to be subjected to higher mechanical stresses
Sulfur, max Phospho-
than those covered in Specification A27A27/A27M/A27M.
rus, max
1.2 Several grades of steel castings are covered, having the
80-40 [550-275] 0.06 0.05
chemical composition and mechanical properties prescribed in
80-50 [550-345] 0.06 0.05
90-60 [620-415] 0.06 0.05
Table 1 and Table 2.
105-85 [725-585] 0.06 0.05
1.3 The values stated in inch-pound units or SI units are to
115-95 [795-655] 0.06 0.05
beregardedseparatelyasstandard.Withinthetext,theSIunits 130-115 [895-795] 0.06 0.05
135-125 [930-860] 0.06 0.05
areshowninbrackets.Thevaluesstatedineachsystemarenot
150-135 [1035-930] 0.06 0.05
exact equivalents; therefore, each system must be used inde-
160-145 [1105-1000] 0.06 0.05
pendentlyoftheother.Combiningvaluesfromthetwosystems 165-150 [1140-1035] 0.020 0.020
165-150L [1140-1035L] 0.020 0.020
may result in nonconformance with the specification.
210-180 [1450-1240] 0.020 0.020
210-180L [1450-1240L] 0.020 0.020
2. Referenced Documents
260-210 [1795-1450] 0.020 0.020
260-210L [1795-1450L] 0.020 0.020
2.1 ASTM Standards:
A27/A27M Specification for Steel Castings, Carbon, for
General Application
A370 TestMethodsandDefinitionsforMechanicalTesting
3 4. Ordering Information
of Steel Products
A781/A781M Specification for Castings, Steel and Alloy, 4.1 The inquiry and order should include or indicate the
Common Requirements for General Industrial Use following:
E29 Practice for Using Significant Digits in Test Data to 4.1.1 A description of the casting by pattern number or
Determine Conformance with Specifications drawing (dimensional tolerances shall be included on the
casting drawing),
3. General Conditions for Delivery
4.1.2 Grade of steel,
3.1 Material furnished to this specification shall conform to
4.1.3 Options in the specification, and
the requirements of Specification A 781A 781/A781M/ 4.1.4 The supplementary requirements desired, including
A781M, including any supplementary requirements that are
the standards of acceptance.
indicated in the purchase order. Failure to comply with the
5. Heat Treatment
general requirements of Specification A781A781/A781M/
A781Mconstitutesnonconformancewiththisspecification.In 5.1 Allcastingsshallbeheattreatedeitherbyfullannealing,
case of conflict between the requirements of this specification normalizing, normalizing and tempering, or quenching and
and SpecificationA781A781/A781M/A781M, this specifica- tempering. Unless otherwise specified in the inquiry, contract,
tion shall prevail. or order, the castings may be heat treated by any of these heat
treatmentsorcombinationoftheseheattreatmentsattheoption
of the manufacturer.
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
5.2 Heat treatment shall be performed after the castings
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
have been allowed to cool below the transformation range.
A01.18 on Castings.
Current edition approved Dec. 15, 1993. Published March 1994. Originally
published as A148–55. Last previous edition A148/A148M–93a. 6. Temperature Control
Annual Book of ASTM Standards, Vol 01.02.
3 6.1 Furnacetemperaturesforheat-treatingshallberegulated
Annual Book of ASTM Standards, Vol 01.03.
by the use of pyrometers.
Annual Book of ASTM Standards, Vol 14.02.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
A 148/A148M – 93b (1998)
TABLE 2 Tensile Requirements
Grade Tensile strength min, Yield point min, Elongation in 2
ksi [MPa] ksi [MPa] in.or50mm, Reduction of Area, min, %
A
min, %
80-40 [550-275] 80 [550] 40 [275] 18 30
80-50 [550-345] 80 [550] 50 [345] 22 35
90-60 [620-415] 90 [620] 60 [415] 20 40
105-85 [725-585] 105 [725] 85 [585] 17 35
115-95 [795-655] 115 [795] 95 [655] 14 30
130-115 [895-795] 130 [895] 115 [795] 11 25
135-125 [930-860] 135 [930] 125 [860] 9 22
150-135 [1035-930] 150 [1035] 135 [930] 7 18
160-145 [1105-1000] 160 [1105] 145 [1000] 6 12
165-150 [1140-1035] 165 [1140] 150 [1035] 5 20
B
165-150L [1140-1035L] 165 [1140] 150 [1035] 5 20
210-180 [1450-1240] 210 [1450] 180 [1240] 4 15
B
210-180L [1450-1240L] 210 [1450] 180 [1240] 4 15
260-210 [1795-1450] 260 [1795] 210 [1450] 3 6
B
260-210L [1795-1450L] 260 [1795] 210 [1450] 3 6
A
When ICI test bars are used in tensile testing as provided for in this specification, the gage length to reduced section diameter ratio shall be 4 to 1.
B
These grades must be charpy impact tested as prescribed in Section 9, and with minimum values as shown in Table 3.
TABLE 3 Impact Requirements
7. Chemical Composition
7.1 The steel shall conform to sulfur and phosphorus re- Grade 165-150L 210-180L 260-210L
[1140- [1450- [1795-
quirements as prescribed in Table 1.
1035L] 1240L] 1450L]
7.2 The content of carbon, manganese, silicon, and alloying
Impact Requirements 20 [27] 15 [20] 6 [8]
elementsmay,byagreement,beprescribedbythepurchaser.If
Charpy V-notch
not specified, the content may be selected by the manufacturer Energy value, ft·lbf [J], min value for
two specimens and minimum aver-
to obtain the required mechanical properties.
age of three specimens
7.3 Whentheanalysisofcarbon,manganese,silicon,orany
Energy value, ft·lbf [J], min for single 16 [22] 12 [16] 4 [5]
specimen
intentionally added alloying element is specifically requested
in the contract or order, it shall be made by the manufacturer
and reported to the purchaser. The results of these analyses
shall not be used as a basis for rejection except by prior
9.3 Test coupons and specimens shall conform to the
agreement.
requirements specified in Section11.
9.4 Impacttestspecimensshallbemachinedtotheformand
8. Tensile Requirements
dimensions shown in Test Methods and Definitions
8.1 One tension test shall be made from each heat and shall
A370A370, Type A, Charpy V-notch specimen, Fig. 11, and
conform to the tensile requirements specified in Table 2.
tested in accordance with those test methods.
8.2 The test coupons and specimens shall conform to
requirements specified in Section 11.
10. Retests
8.3 Tension test coupons shall be machined to the form and
10.1 If the results of the tensile or charpy tests do not
dimension shown in Fig. 5 of Test Methods and Definitions
conform to the requirements specified, heat-treated castings
A370A370 and tested in accordance
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