ASTM A27/A27M-10
(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.
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Designation:A27/A27M −10
StandardSpecification 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 Department of Defense.
1. Scope* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This specification covers carbon steel castings for gen-
A370 Test Methods and Definitions for Mechanical Testing
eral applications that require up to 70 ksi (485 MPa) minimum
of Steel Products
tensile strength.
A732/A732M Specification for Castings, Investment, Car-
NOTE 1—The grades covered by this specification represent materials
bon and Low Alloy Steel for General Application, and
that are suitable for assembly with other steel castings or wrought steel
Cobalt Alloy for High Strength at Elevated Temperatures
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
Common Requirements, for General Industrial Use
techniques can be used on all castings. It is the responsibility of the
purchaser to establish for himself a suitable welding technique. A957/A957M Specification for Investment Castings, Steel
and Alloy, Common Requirements, for General Industrial
1.2 Several grades and two classes of steel castings are
Use
covered, as indicated below. The grade and class desired shall
be specified by the purchaser.
3. General Conditions for Delivery
1.2.1 Grade N-1—Chemical analysis only.
3.1 Except for steel investment castings, material furnished
1.2.2 Grade N-2—Heat-treated but not mechanically tested.
to this specification shall conform to the requirements of
1.2.3 Grade U-60-30 [415-205]—Mechanically tested but
Specification A781/A781M, including any supplementary re-
not heat-treated.
quirements that are indicated in the purchase order. Failure to
comply with the general requirements of Specification A781/
1.2.4 Grades 60-30 [415-205], 65-35 [450-240], 70-36
[485-250], and 70-40 [485-275]—Heat-treated and mechani- A781M constitutes nonconformance with the specification. In
caseofaconflictbetweentherequirementsofthisspecification
cally tested.
and Specification A781/A781M, this specification shall pre-
1.2.5 Class 1 and Class 2 steel castings shall be specified in
vail.
accordance with 9.2.
3.2 Steel investment castings furnished to this specification
1.3 The values stated in either SI units or inch-pound units
shall conform to the requirements of Specification A957/
are to be regarded separately as standard. The values stated in
A957M, including any supplementary requirements that are
each system may not be exact equivalents; therefore, each
indicated in the purchase order. Failure to comply with the
system shall be used independently of the other. Combining
common requirements of Specification A957/A957M consti-
values from the two systems may result in non-conformance
tutes nonconformance with this specification. In case of con-
with the standard.
flict between the requirements of this specification and Speci-
1.4 This standard does not purport to address all of the
fication A957/A957M, Specification A957/A957M shall
safety concerns, if any, associated with its use. It is the
prevail.
responsibility of the user of this standard to establish appro-
4. Ordering Information
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
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 Alloysand 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 Oct. 1, 2010. Published November 2010. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1901. Last previous edition approved in 2008 as A27/A27M – 08. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/A0027_A0027M-10. 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−10
TABLE 2 Tensile Requirements
4.1.2 Specification, grade (1.2), and class (9.2),
A
4.1.3 Descrip
...
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–08 Designation: A27/A27M – 10
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 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 Grades60-30 [415-205],65-35[450-240],70-36[485-250],and70-40[485-275]—Heat-treatedandmechanicallytested.
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 non-conformance 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A732/A732M Specification for Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy
for High Strength at Elevated Temperatures
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
SpecificationA781/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
requirements of Specification A957/A957M constitutes nonconformance with this specification. In case of conflict between the
requirements of this specification and Specification A957/A957M, Specification A957/A957M shall prevail.
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.18
on Castings.
Current edition approved Oct. 1, 2008.2010. Published November 2008.2010. Originally approved in 1901. Last previous edition approved in 20052008 as
A27/A27M – 058. DOI: 10.1520/A0027_A0027M-108.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For 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.
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