7 .14 TABLE 7.1: NOMINAL MECHANICAL PROPERTIES AND COMPOSITION OF HY-80, HY-100, AND AISI 4130 STEELS HY-80 HY-100 AISI 4130 80,000 psi yield 100,000 psi yield 150,000 psi yield Properties 95,000 psi ult 120,000 psi ult 200,000 psi ult .18% C .2% C .3% C .10 - .40% Mn .10 - .40% Mn .5% Mn 2.0 - 3.25% Ni 2.25 - 3.5% Ni .3% Si . 2 - . 6% Mo . 2 - .6% Mo 1.0% Cr Composition .25% Si .25% Si .2% Mo 1.4% Cr 1.4% Cr no more than no more than no more than .04% p .025% p .025% p .04% s .025% s .025% s
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