C: 0.020% max Si: 0.70% max Mn: 2.00%-4.00% P: 0.030% max S: 0.010% max Cr: 23.0%-25.0% Mo: 5.50%-6.50% Ni: 21.0%-23.0% Cu: 1.00%-2.00% N: 0.35%-0.50% W: 1.50%-2.50%