ASTM A27/A27M-20
(Specification)Standard Specification for Steel Castings, Carbon, for General Application
Standard Specification for Steel Castings, Carbon, for General Application
ABSTRACT
This specification covers carbon steel castings for general applications. The grades of steels covered here are: Grade N-1, Grade N-2, Grade U-60-30 [415-205], Grade 60-30 [415-205], Grade 65-35 [450-240], Grade 70-36 [485-250] and Grade 70-40 [485-275]. Except for Grades N-1 and U-60-30, all steel castings shall be heat-treated by full annealing, normalizing, normalizing and tempering, or quenching and tempering. Heat treatments shall be performed after castings have been allowed to cool. Heat and product analyses shall be performed wherein specimens shall conform to required chemical composition of carbon, manganese, silicon, sulfur and phosphorus. Except for Grades N-1 and N-2, all steels shall undergo tension test, and shall conform to the following mechanical requirements: tensile strength, yield point, elongation, and reduction of area.
SCOPE
1.1 This specification covers carbon steel castings for general applications that require up to 70 ksi (485 MPa) minimum tensile strength.
Note 1: The grades covered by this specification represent materials that are suitable for assembly with other steel castings or wrought steel parts by fusion welding. It is not intended to imply that all these grades possess the same degree of weldability or that the same welding techniques can be used on all castings. It is the responsibility of the purchaser to establish for himself a suitable welding technique.
1.2 Several grades and two classes of steel castings are covered, as indicated below. The grade and class desired shall be specified by the purchaser.
1.2.1 Grade N-1—Chemical analysis only.
1.2.2 Grade N-2—Heat treated but not mechanically tested.
1.2.3 Grade U-60-30 [415-205]—Mechanically tested but not heat treated.
1.2.4 Grades 60-30 [415-205], 65-35 [450-240], 70-36 [485-250], and 70-40 [485-275]—Heat treated and mechanically tested.
1.2.5 Class 1 and Class 2 steel castings shall be specified in accordance with 9.2.
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 nonconformance with the standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:A27/A27M −20
Standard Specification for
1
Steel Castings, Carbon, for General Application
This standard is issued under the fixed designation A27/A27M; 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* ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
1.1 This specification covers carbon steel castings for gen-
mendations issued by the World Trade Organization Technical
eral applications that require up to 70 ksi (485 MPa) minimum
Barriers to Trade (TBT) Committee.
tensile strength.
NOTE 1—The grades covered by this specification represent materials 2. Referenced Documents
that are suitable for assembly with other steel castings or wrought steel
2
2.1 ASTM Standards:
parts by fusion welding. It is not intended to imply that all these grades
A781/A781M Specification for Castings, Steel and Alloy,
possess the same degree of weldability or that the same welding
techniques can be used on all castings. It is the responsibility of the
Common Requirements, for General Industrial Use
purchaser to establish for himself a suitable welding technique.
A957/A957M Specification for Investment Castings, Steel
1.2 Several grades and two classes of steel castings are and Alloy, Common Requirements, for General Industrial
covered, as indicated below. The grade and class desired shall Use
be specified by the purchaser.
3. General Conditions for Delivery
1.2.1 Grade N-1—Chemical analysis only.
1.2.2 Grade N-2—Heat treated but not mechanically tested.
3.1 Except for steel investment castings, material furnished
1.2.3 Grade U-60-30 [415-205]—Mechanically tested but
to this specification shall conform to the requirements of
not heat treated.
Specification A781/A781M, including any supplementary re-
1.2.4 Grades 60-30 [415-205], 65-35 [450-240], 70-36
quirements that are indicated in the purchase order. Failure to
[485-250], and 70-40 [485-275]—Heat treated and mechani-
comply with the general requirements of Specification A781/
cally tested.
A781M constitutes nonconformance with the specification. In
1.2.5 Class 1 and Class 2 steel castings shall be specified in
caseofaconflictbetweentherequirementsofthisspecification
accordance with 9.2.
and Specification A781/A781M, this specification shall pre-
vail.
1.3 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
3.2 Steel investment castings furnished to this specification
each system may not be exact equivalents; therefore, each
shall conform to the requirements of Specification A957/
system shall be used independently of the other. Combining
A957M, including any supplementary requirements that are
values from the two systems may result in nonconformance
indicated in the purchase order. Failure to comply with the
with the standard.
common requirements of Specification A957/A957M consti-
tutes nonconformance with this specification. In case of con-
1.4 This standard does not purport to address all of the
flict between the requirements of this specification and Speci-
safety concerns, if any, associated with its use. It is the
fication A957/A957M, Specification A957/A957M shall
responsibility of the user of this standard to establish appro-
prevail.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
4. Ordering Information
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4.1 Orders for material under this specification should
include the following information in proper sequence.
4.1.1 Quantity,
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
2
A01.18 on Castings. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2020. Published May 2020. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1901. Last previous edition approved in 2019 as A27/A27M – 19. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/A0027_A0027M-20. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM I
...
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: A27/A27M − 19 A27/A27M − 20
Standard Specification for
1
Steel Castings, Carbon, for General Application
This standard is issued under the fixed designation A27/A27M; 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 castings for general applications that require up to 70 ksi (485 MPa) minimum tensile
strength.
NOTE 1—The grades covered by this specification represent materials that are suitable for assembly with other steel castings or wrought steel parts by
fusion welding. It is not intended to imply that all these grades possess the same degree of weldability or that the same welding techniques can be used
on all castings. It is the responsibility of the purchaser to establish for himself a suitable welding technique.
1.2 Several grades and two classes of steel castings are covered, as indicated below. The grade and class desired shall be
specified by the purchaser.
1.2.1 Grade N-1—Chemical analysis only.
1.2.2 Grade N-2—Heat treated but not mechanically tested.
1.2.3 Grade U-60-30 [415-205]—Mechanically tested but not heat treated.
1.2.4 Grades 60-30 [415-205], 65-35 [450-240], 70-36 [485-250], and 70-40 [485-275]—Heat treated and mechanically tested.
1.2.5 Class 1 and Class 2 steel castings shall be specified in accordance with 9.2.
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 nonconformance with the standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
A781/A781M Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use
A957/A957M Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
3. General Conditions for Delivery
3.1 Except for steel investment castings, 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 the specification. In case of a
conflict between the requirements of this specification and Specification A781/A781M, this specification shall prevail.
3.2 Steel investment castings furnished to this specification shall conform to the requirements of Specification A957/A957M,
including any supplementary requirements that are indicated in the purchase order. Failure to comply with the common
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.18
on Castings.
Current edition approved Sept. 1, 2019May 1, 2020. Published September 2019May 2020. Originally approved in 1901. Last previous edition approved in 20172019 as
A27/A27M – 17.A27/A27M – 19. DOI: 10.1520/A0027_A0027M-19.10.1520/A0027_A0027M-20.
2
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
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A27/A27M − 20
requirement
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