Historical
ASTM A304-05e2
Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements
1.1 This specification covers hot-worked alloy, carbon, and carbon-boron steels in a variety of compositions and sizes, which may attain specified depth of hardening in the end quench test. These steel compositions are identified by the suffix letter "H" added to the conventional grade number.
1.2 This specification provides for analyses other than those listed under Tables 1 and 2. Special hardenability limits are also permissible when approved by the purchaser and manufacturer.
1.3 The values stated in inch-pound units are to be regarded as the standard.
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ASTM International [astm]
ASTM International [astm]