Active Standard: A668 / A668M - 13e1
During the last revision of this specification, the test location for forgings in classes F, J, K, L, M and N was changed to 1/4Tc and 3.5 from all other quenched surfaces. This had the unintended consequence that some small forgings would require prolongations larger than Tc of the forging itself to meet the 3.5 set back from all other surfaces statement.
Keywordsalloy steel forgings; carbon steel forgings; general industrial applications; heat treatment classifications; strength classifications ;
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