Heat treatment and product forms III

JBK-75 superalloy in solution annealed, with no aging, is negligibly embrittled by hydrogen at 34.5 MPa (5 ksi) pressure. Heat treatment study has shown that aging conditions would dramatically increase the US and UTS for JBK-75. However, such aging conditions would make JBK-75, including A-286 and Incoloy 903, very susceptible to hydrogen embrittlement