Within the ASSAB XW-5 is a tungsten-containing high-carbon, high chromium alloy steel, its characteristics are: excellent wear resistance * High compressive strength after hardening and high surface hardness * good hardenability * quenching hard, good stability * good resistance to temper softening nature within the ASSAB XW-5 steel because of its excellent wear resistance was the engineering sector wide receiver tested in long-life mold, and in the production process low maintenance costs, with good economic chemical composition: C 2.05%, Si 0.3% Mn 0.8% Cr, 12.5% ??W, 1.3% Factory state: soft annealing to 240HB