1. Scope
1.1 This specification covers gray iron castings intended for general engineering use where tensile strength is a major consideration. Castings are classified on the basis of the tensile strength of the iron in separately cast test bars.
1.1.1 This specification subordinates chemical composition to tensile strength.
1.2 Castings produced to this specification are graded on the basis of minimum tensile strength obtained in special test coupons designed to standardize cooling rate. The tensile strength developed in certain casting sections may vary from test coupon values (see X1.2).
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 shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
2. Referenced Documents
A644 Terminology Relating to Iron Castings
E8 Test Methods for Tension Testing of Metallic Materials
MIL-STD-129 Marking for Shipment and Storage
Federal Standard No. 123 Marking for Shipment (Civil Agencies)
Index Terms
gray iron castings; ICS Number Code 77.140.80
Citing ASTM Standards
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