Martensitic ph stainless steel for single-crystal bolt

Abstract

PURPOSE: To improve strength and to prevent delayed fracture by specifying the amounts of C, Si, Mn, P, S, Ni, Cr, Ti, Al, and Cu so as to make a crystalline structure easy of forming into single crystal. CONSTITUTION: This stainless steel has a composition consisting of, by weight, ≤0.03% C, ≤0.2% Si, ≤0.3% Mn, ≤0.015% P, ≤0.005% S, 5W9% Ni, 10W16% Cr, 0.6W1.5% Ti, 0.4W1.2% Al ≤3% Cu, and the balance Fe. The above steel is easy to form into single crystal, improved in strength, and excellent in delayed fracture-resisting characteristic. COPYRIGHT: (C)1987,JPO&Japio

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