Standard Specification for Steel Castings, Carbon, for General Application

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 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. Inch-pound units are applicable for material ordered to Specification A 27 and SI units for material ordered to Specification A 27M.

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ASTM A27/A27M-03 - Standard Specification for Steel Castings, Carbon, for General Application
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A 27/A 27M – 03
Standard Specification for
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Steel Castings, Carbon, for General Application
This standard is issued under the fixed designation A 27/A 27M; 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 (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 * A 370 Test Methods and Definitions for MechanicalTesting
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of Steel Products
1.1 This specification covers carbon steel castings for gen-
A 732/A 732M Specification for Castings, Investment, Car-
eral applications that require up to 70 ksi [485 MPa] minimum
bon and Low Alloy Steel for General Application, and
tensile strength.
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Cobalt Alloy for High Strength at Elevated Temperatures
NOTE 1—The grades covered by this specification represent materials
A 781/A 781M Specification for Castings, Steel and Alloy,
that are suitable for assembly with other steel castings or wrought steel
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Common Requirements, for General Industrial Use
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
3. General Conditions for Delivery
techniques can be used on all castings. It is the responsibility of the
3.1 Material furnished to this specification shall conform to
purchaser to establish for himself a suitable welding technique.
the requirements of Specification A 781/A 781M, including
1.2 Several grades and two classes of steel castings are
any supplementary requirements that are indicated in the
covered, as indicated below. The grade and class desired shall
purchase order. Failure to comply with the general require-
be specified by the purchaser.
ments of Specification A 781/A 781M constitutes nonconfor-
1.2.1 Grade N-1—Chemical analysis only.
mance with this specification. In case of conflict between the
1.2.2 Grade N-2—Heat-treated but not mechanically tested.
requirements of this specification and Specification A 781/
1.2.3 Grade U-60-30 [415-205]—Mechanically tested but
A 781M, this specification shall prevail.
not heat-treated.
1.2.4 Grades 60-30 [415-205], 65-35 [450-240], 70-36
4. Ordering Information
[485-250], and 70-40 [485-275]—Heat-treated and mechani-
4.1 Orders for material under this specification should
cally tested.
include the following information in proper sequence.
1.2.5 Class 1 and Class 2 steel castings shall be specified in
4.1.1 Quantity,
accordance with 9.2.
4.1.2 Specification, grade (1.2), and class (9.2),
1.3 The values stated in either inch-pound units or SI units
4.1.3 Description of the casting by pattern number or
are to be regarded separately as standard. Within the text, the
drawing,
SI units are shown in brackets. The values stated in each
4.1.4 Options in the specification, and
system are not exact equivalents; therefore, each system must
4.1.5 Supplementary requirements desired, including stan-
be used independently of the other. Combining values from the
dards of acceptance.
two systems may result in nonconformance with the specifi-
cation. Inch-pound units are applicable for material ordered to
5. Heat Treatment
Specification A 27 and SI units for material ordered to Speci-
5.1 All castings of Grades N-2, 60-30 [415-205], 65-35
fication A 27M.
[450-240], 70-36 [485-250], and 70-40 [485-275] shall be
heat-treated by full annealing, normalizing, normalizing and
2. Referenced Documents
tempering, or quenching and tempering. Unless otherwise
2.1 ASTM Standards:
specified in the inquiry, contract, or order, the castings may be
heat-treated by any one or combination of these heat-
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treatments at the option of the manufacturer.
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 April 10, 2003. Published April 2003. Originally
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approved in 1991. Last previous edition approved in 2000 as A 27/ Annual Book of ASTM Standards, Vol 01.03.
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A 27M – 95 (2000). Annual Book of ASTM Standards, Vol 01.02.
*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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A 27/A 27M – 03
TABLE 1 Chemical Requirements
A
Grade (UNS No.) Composition, %
B B
Carbon, max Manganese, max Silicon, max Sulfur, max Phosphorus, max
Grade N-1 (J02500) 0.25 0.75 0.80 0.06 0.05
Grade N-2 (J03500) 0.35 0.60 0.80 0.06 0.05
Grade U-60-30 [415-205] (J02500) 0.25 0.75 0.80 0.06 0.05
Grade 60-30 [415-205] (J03000) 0.30 0.
...

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