Carbon (C) .78/.88 Manganese (Mn) .15/.88 Silicon (Si) .20/.45 Tungsten (W) 5.50/6.75 Molybdenum (Mo) 4.50/5.50 Chromium (Cr) 3.75/4.50 Vanadium (V) 1.75/2.20 Nickel (Ni) .30 max