1941-01-01

Determining Hardenability on Small Sizes 410115

LIMITATIONS of the two general methods available for determining hardenability in steel, the authors point out, are that the test piece may not have a sufficient cross-section in which to develop the desired series of cooling rates, and that a special test piece (known as the L-type) must be machined for steels of low hardenability. The method using the Wuerfel bomb described in their paper, they explain, is directed primarily toward removal of these two limitations.
Stated in terms of the critical diameter, they report that the results of the method are reproducible within ⅛ in.

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