ASTM A304:16 pdf download.Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements.
3.1.1 hardenabiliry—the relative ability of a steel to harden under heat treatment becomes apparent in the degree to which the material hardens when quenched at different cooling rates. It is measured quantitatively, usually by noting the extent or depth of hardening of a standard size and shape test specimen in a standardized quench. In the “end-quench” test the “depth of hardening” is the distance along the specimen from the quenched end to a given hardness.
4. Ordering Information
4.1 Orders for material under this specification should include the following information, in proper sequence:
4.1.1 Quantity (weight),
4.1.2 Name of material (alloy, carbon, or carbon-boron steel),
4.1.3 Cross-sectional shape,
4.1.4 Size,
4.1.5 Length,
4.1.6 Grade.
4.1.7 End-quenched hardenability (see Section 9),
4.1.8 Report of heat analysis, if desired (see Section 7),
4.1.9 Special straightness. if required.
4.1.10 ASTM designation and date of issue,
4.1.11 End use or special requirements, and
4.1.12 Leaded steel, when required.
NOTE 1—A typical ordering description is as follows: 10 (XX) lb. alloy bars, round. 4.0 in. dia by 10 ft. Grade 1340H. J 40,56 = 6/16 in., heat analysis required, ASTM A304, dated worm gear.
4.2 The purchaser shall specify the desired grade. including the suffix letter “H,” in accordance with Table 1 or Table 2.
4.3 Band limits are shown graphically and as tabulations in Figs. 2-87, inclusive. For specifications purposes. the tabulated values of Rockwell C hardness are used. Values below 20 Rockwell C hardness (20 HRC) are not specified because such values are below the normal range of the C scale. The graphs are shown for convenience in estimating the hardness values obtainable at various locations on the end quench test bar and for various locations in oil or water quenched rounds. The relationship between end-quench distance and bar diameter is approximate and should be used only as a guide.
ASTM A304:16 pdf download
