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).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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...