2715 is a molybdenum high speed steel, carbide heterogeneity with small and high toughness advantages easy to overheat, it should be strictly controlled quenching temperature, the heat protection requirements more stringent, because of its hardness and wear resistance, used for manufacture of cutting more difficult to cut materials with a high-speed steel carbide tool .2715 greater tendency, so the heat protection requirements more stringent, to withstand vibration and shock loads for the mold. factory hardness: ≤ 255HB hardness of hardened temperature :1220-1240 : ≤ 63 Main use: cold forging die, precision die, powder pressing molds, die cutting machine, add the glass of the plastic mold and so on. Suitable to withstand vibration and shock loading of the mold: deep drawing die, punching die. Metal cutting saw blade, cold heading and extrusion tools. 

 Chemical composition 
 Carbon C: 0.80 ~ 0.90 (tolerance: ± 0.01) Si Si: 0.20 ~ 0.45 (tolerance: ± 0.05) Manganese Mn: 0.15 ~ 0.40 (tolerance: +0.04) S S: ≤ 0.030 P P: ≤ 0.030 Cr Cr: 3.80 ~ 4.40 (tolerance: ± 0.05) Ni: to allow the residual copper content of ≤ 0.30 Cu: ≤ 0.25 to allow the residual content of vanadium V: 1.75 ~ 2.20 (tolerance: ± 0.05) Mo Mo: 4.50 ~ 5.50 (tolerance : size ≤ 6, ± 0.05; size> 6, ± 0.10) W W: 5.50 ~ 6.75 (tolerance: size ≤ 10, ± 0.10; size> 10, ± 0.20) Note: According to the agreement between, V content can be of 1.60 ~ 2.20 M2 is molybdenum high speed steel, carbide heterogeneity with small and high toughness advantages easy to overheat, it should be strictly controlled quenching temperature, the heat protection requirements more stringent, because of its hardness and wear resistance Well, more difficult to cut materials for manufacturing the cutting tool. M2 high speed steel has a greater tendency to carbide, so the heat protection requirements more stringent, to withstand vibration and shock loads for the mold. 

 Factory hardness: ≤ 255HB 

 Hardening temperature :1220-1240 

 Hardness: ≤ 63 

 Main purpose: 

 Cold forging die, precision die, powder pressing molds, die cutting machine, add the glass of the plastic mold and so on. Suitable to withstand vibration and shock loading of the mold: deep drawing die, punching die. Metal cutting saw blade, cold heading and extrusion tools. 

 Chemical composition 
 Carbon C: 0.80 ~ 0.90 (tolerance: ± 0.01) 

 Si Si: 0.20 ~ 0.45 (tolerance: ± 0.05) 

 Manganese Mn: 0.15 ~ 0.40 (tolerance: +0.04) 

 S S: ≤ 0.030 

 Phosphorus P: ≤ 0.030 

 Chromium Cr: 3.80 ~ 4.40 (tolerance: ± 0.05) 

 Ni: to allow the residual content of ≤ 0.30 

 Copper Cu: ≤ 0.25 to allow the residual content 

 Vanadium V: 1.75 ~ 2.20 (tolerance: ± 0.05) 

 Mo Mo: 4.50 ~ 5.50 (tolerance: size ≤ 6, ± 0.05; size> 6, ± 0.10) 

 Tungsten W: 5.50 ~ 6.75 (tolerance: size ≤ 10, ± 0.10; size> 10, ± 0.20) 

 Note: According to the agreement between, V content can be 1.60 ~ 2.20