Astm a27m-03

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Designation: A 27/A 27M – 03

An American National Standard

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 notintended 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 GradeN-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 eitherinch-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 toSpecification A 27 and SI units for material ordered to Specification A 27M. 2. Referenced Documents 2.1 ASTM Standards:
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 April 10, 2003. Published April 2003. Originally approved in 1991. Last previousedition approved in 2000 as A 27/ A 27M – 95 (2000).

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COPYRIGHT 2003; ASTM International


Standard Specification for

Steel Castings, Carbon, for General Application1
This standard is issued under the fixed designation A27/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.

A370 Test Methods and Definitions for Mechanical Testing of Steel Products2 A 732/A 732M Specification for Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures3 A 781/A 781M Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use3 3. General Conditions for Delivery 3.1 Materialfurnished to this specification shall conform to the requirements of Specification A 781/A 781M, including any supplementary requirements that are indicated in the purchase order. Failure to comply with the general requirements of Specification A 781/A 781M constitutes nonconformance with this specification. In case of conflict between the requirements of this specification and Specification A 781/ A 781M, thisspecification shall prevail. 4. Ordering Information 4.1 Orders for material under this specification should include the following information in proper sequence. 4.1.1 Quantity, 4.1.2 Specification, grade (1.2), and class (9.2), 4.1.3 Description of the casting by pattern number or drawing, 4.1.4 Options in the specification, and 4.1.5 Supplementary requirements desired, including standards of...
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