C: 0.04%-0.10% Si: 0.30%-0.60% Mn: 1.50% max P: 0.035% max S: 0.015% max Cr: 15.5%-17.5% Mo: 1.10%-1.50% Ni: 12.5%-14.5% Nb: 10XC-1.20% V: 0.60%-0.85% N: 0.06%-0.14%