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 5CrW2Si impact-resistant alloy tool steel tool steel, composition, performance and 4CrW2Si similar. 5CrW2Si chrome silicon steel in the basis of the 2.00% to 2.50% (mass) made of tungsten, tungsten and the incorporation of a quenching helps to maintain a relatively fine grain, which may in the tempered condition higher toughness, and improve the tempering stability. The steel has certain hardenability and high temperature mechanical properties. [Purpose] for the manufacture of cold metal cutting blade, shovel blade twist wire board, and the trimming of cold blanking die and the period of work and carpentry tools, and hand or pneumatic chisel, air hammer tools, boiler tool, die and punch head, scissors (heavy shock), cutter (heavy shock), broken concrete, etc.. [] Hot-rolled sheet production varieties, forgings, cold-drawn material, cold-drawn steel wire. Chemical Composition】 【5CrW2Si 5CrW2Si carbon C 0.45 ~ 0.55, Si Si 0.50 ~ 0.80, manganese Mn ≤ 0.40, S S ≤ 0.030, P P ≤ 0.030, chromium Cr 1.00 ~ 1.30, Ni: to allow the residual content of ≤ 0.25, copper allow the residual content of Cu ≤ 0.30, Tungsten W 2.00 ~ 2.50 [mechanical properties] Hardness: Annealed 255 ~ 207HB, indentation diameter of 3.8 ~ 4.2mm; hardening heat treatment specifications ≥ 55HRC [] samples quenched 860 ~ 900 ℃, oil-cooling. [State] delivery of steel to annealing state of delivery. [] 5CrW2Si steel thermal processing thermal processing are shown in Table 2-18-3. 5CrW2Si thermal processing of steel 

 Item heating temperature / ℃ before forging temperature / ℃ final forging temperature / ℃ Cooling 
 Ingot billet 1180 ~ 1200 1150 ~ 1180 1150 ~ 1170 1120 ~ 1150 ≥ 850 ≥ 850 slow cooling slow cooling