ASTM A148/A148M-14
(Specification)Standard Specification for Steel Castings, High Strength, for Structural Purposes
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 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 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.
1.3.1 Within the text, the SI units are shown in brackets.
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Designation:A148/A148M −14
StandardSpecification 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* Specification A781/A781M constitutes nonconformance with
this specification. In case of conflict between the requirements
1.1 This specification covers carbon steel, alloy steel, and
of this specification and Specification A781/A781M, this
martensitic stainless steel castings that are to be subjected to
specification shall prevail.
higher mechanical stresses than those covered in Specification
A27/A27M.
4. Ordering Information
1.2 Several grades of steel castings are covered, having the
4.1 The inquiry and order should include or indicate the
chemical composition and mechanical properties prescribed in
following:
Tables 1 and 2.
4.1.1 A description of the casting by pattern number or
1.3 The values stated in either SI units or inch-pound units
drawing (dimensional tolerances shall be included on the
are to be regarded separately as standard. The values stated in
casting drawing),
each system may not be exact equivalents; therefore, each
4.1.2 Grade of steel,
system shall be used independently of the other. Combining
4.1.3 Options in the specification, and
values from the two systems may result in non-conformance
4.1.4 The supplementary requirements desired, including
with the standard.
the standards of acceptance.
1.3.1 Within the text, the SI units are shown in brackets.
5. Heat Treatment
2. Referenced Documents
5.1 Allcastingsshallbeheattreatedeitherbyfullannealing,
2.1 ASTM Standards:
normalizing, normalizing and tempering, or quenching and
A27/A27MSpecification for Steel Castings, Carbon, for
tempering. Unless otherwise specified in the inquiry, contract,
General Application
or order, the castings may be heat treated by any of these heat
A370Test Methods and Definitions for Mechanical Testing
treatmentsorcombinationoftheseheattreatmentsattheoption
of Steel Products
of the manufacturer.
A781/A781MSpecification for Castings, Steel and Alloy,
Common Requirements, for General Industrial Use
5.2 Heat treatment shall be performed after the castings
E29Practice for Using Significant Digits in Test Data to
have been allowed to cool below the transformation range.
Determine Conformance with Specifications
6. Temperature Control
3. General Conditions for Delivery
6.1 Furnacetemperaturesforheat-treatingshallberegulated
3.1 Material furnished to this specification shall conform to
by the use of pyrometers.
the requirements of Specification A781/A781M, including any
supplementary requirements that are indicated in the purchase
7. Chemical Composition
order. Failure to comply with the general requirements of
7.1 The steel shall conform to sulfur and phosphorus re-
quirements as prescribed in Table 1.
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
7.2 The content of carbon, manganese, silicon, and alloying
Stainless Steel and Related Alloysand is the direct responsibility of Subcommittee
A01.18 on Castings.
elementsmay,byagreement,beprescribedbythepurchaser.If
Current edition approved Nov. 15, 2014. Published December 2014. Originally
not specified, the content may be selected by the manufacturer
approved in 1955. Last previous edition approved in 2008 as A148/A148M–08.
to obtain the required mechanical properties.
DOI: 10.1520/A0148_A0148M-14.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.3 Whentheanalysisofcarbon,manganese,silicon,orany
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
intentionally added alloying element is specifically requested
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. in the contract or order, it shall be made by the manufacturer
*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
A148/A148M−14
TABLE 1 Chemical Requirements
Grade (UNS No.) Composition, %
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 [1795-1450L] (D52101) 0.020 0.020
TABLE 2 Tensile Requirements
Grade Tensile strength min, Yield point min, Elongation in 2 Reduction of Area, min, %
ksi [MPa] ksi [MPa] in.or50mm,
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
165-150L [1140-1035L] 165 [1140] 150 [1035] 5 20
210-180 [1450-1240] 210 [1450] 180 [1240] 4 15
210-180L [1450-1240L] 210 [1450] 180 [1240] 4 15
260-210 [1795-1450] 260 [1795] 210 [1450] 3 6
260-210L [1795-1450L] 260 [1795] 210 [1450] 3 6
and reported to the purchaser. The results of these analyses 9. Charpy Impact Requirements
shall not be used as a basis for rejection except by prior
9.1 This section is applicable only to grades 165-150L
agreement.
[1140-1035L], 210-180L [1450-1240L], and 260-210L [1795-
1450L].
8. Tension Testing Requirements
NOTE 1—Other grades may be ordered to charpy impact test require-
8.1 One tension test shall be made from each heat and shall
mentsinaccordancewithSupplementaryRequirementS9ofSpecification
conform to the tensile requirements specified in Table 2. A781/A781M.
9.2 The impact properties of each heat shall be determined
8.2 The test coupons and specimens shall conform to
bytestingonesetofthreeCharpyV-notchimpactspecimensat
requirements specified in Section 11.
−40° 6 2°F [−40° 6 1°C]. The energy value of the three
8.3 Tension test coupons shall be machined to the form and
specimens shall not be less than shown in Table 3.
dimension shown in Fig. 4 of Test Methods and Definitions
A370andtestedinaccordancewiththosetestmethodswiththe
TABLE 3 Impact Requirements
ends machined to fit the grips on the tensile testing machine to
Grade 165-150L 210-180L 260-210L
be used. Suggested types of ends for standard round tension
[1140- [1450- [1795-
test specimens are shown in Fig. 5 of Test Methods and
1035L] 1240L] 1450L]
Definitions A370.
Impact Requirements 20 [27] 15 [20] 6 [8]
Charpy V-notch
8.4 To determine conformance with the tension
...
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: A148/A148M − 08 A148/A148M − 14
Standard Specification for
Steel Castings, High Strength, for Structural Purposes
This standard is issued under the fixed designation A148/A148M; 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.
This standard has been approved for use by agencies of the U.S. 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 either SI 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 nonconformancenon-
conformance with the specification. standard.
1.3.1 Within the text, the SI units are shown in brackets.
2. Referenced Documents
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.
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloysand is the direct responsibility of Subcommittee A01.18
on Castings.
Current edition approved March 1, 2008Nov. 15, 2014. Published March 2008December 2014. Originally approved in 1955. Last previous edition approved in 20052008
as A148/A148M – 05.A148/A148M – 08. DOI: 10.1520/A0148_A0148M-08.10.1520/A0148_A0148M-14.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 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
A148/A148M − 14
TABLE 1 Chemical Requirements
Grade (UNS No.) Composition, %
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 [1795-1450L] (D52101) 0.020 0.020
TABLE 2 Tensile Requirements
Grade Tensile strength min, Yield point min, Elongation in 2 Reduction of Area, min, %
ksi [MPa] ksi [MPa] in. or 50 mm,
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
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
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
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.
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.
7. Chemical Composition
7.1 The steel shall conform to sulfur and phosphorus requirements as prescribed in Table 1.
7.2 The content of carbon, manganese, silicon, and alloying elements may, by agreement, be prescribed by the purchaser. If not
specified, the content may be selected by the manufacturer to obtain the required mechanical properties.
7.3 When the analysis of carbon, manganese, silicon, or any 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 agreement.
8. Tensile Tension Testing Requirements
8.1 One tension test shall be made from each heat and shall conform to the tensile requirements specified in Table 2.
8.2 The test coupons and specimens shall conform to requirements specified in Section 11.
8.3 Tension test coupons shall be machined to the form and dimension shown in Fig. 4 of Test Methods and Definitions A370
and tested in accordance with those test methods with the ends machined to fit the grips on the tensile testing machine to be used.
Suggested types of ends for standard round tension test specimens are shown in Fig. 5 of Test Methods and Definitions A370.
A148/A148M − 14
8.4 To determine conformance with the tension test requirements, an observed value or calculated value shall be rounded off
in accordance with Practice E29 to the nearest 500 psi [5 MPa] for yield point and tensile strength and to the nearest 1 % for
elongation and reduction of area.
9. Charpy Impact Requirements
9.1 This section is
...
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