SKH53 
 Standard (JIS G4403) ω /% economic high-speed tool steel, tungsten-molybdenum system in general-purpose high-speed steel SKH53 will be the basis of vanadium content to 2.25% - 2.75% made of high carbon high-vanadium high speed steel. The steel has an economic, small uniform carbide, high toughness, thermoplastic, but can grind the poor, easy to decarburization. Manufacture of cutting tools can be difficult to cut materials. To further improve the red hardness and wear resistance of steel to form carbon, high vanadium high speed steel, usually containing about 3% V steel. And with the amount of V 4% -5%, the shape of a simple and appropriate to create a small amount of cutting or grinding. Poor due to grinding of the steel, suitable for the production of complex tools. For the production of various types of general tools such as broaches, molding cutter, cutter, drill, tap, lathe, planer, etc. Still allows the production of more complex tools. Suitable for processing high-strength steel, high temperature alloys and other difficult materials. 
 SKH53 chemical composition 
 Carbon C: 1.00 ~ 1.10 (promise deviation: ± 0.01) Si Si: 0.20 ~ 0.45 (promise deviation: ± 0.05) Manganese Mn: 0.15 ~ 0.40 (agreed deviation: 0.04) S S: ≤ 0.030 P P: ≤ 0.030 Cr-Cr: 3.75 ~ 4.50 (promise deviation: ± 0.05) Ni: to agree the residual copper content ≤ 0.30 Cu: ≤ 0.25 promised to the residual content of vanadium V: 2.25 ~ 2.75 (promise deviation: ± 0.05) Mo Mo: 4.75 ~ 6.50 (promise bias: dimensions ≤ 6, ± 0.05 ; size> 6, ± 0.10) W W: 5.00 ~ 6.75 (promise bias: dimensions ≤ 10, ± 0.10; size> 10, ± 0.20) 
 SKH53 physical properties 
 SKH53 mechanical properties 
 Hardness: the hardness of delivery: (other processing methods) ≤ 269HB; (annealing) ≤ 255HB. Quenching and tempering heat treatment system and the sample hardness: ≥ 64HRC 
 SKH53 heat treatment process 
 Standard heat treatment: quenching, 730 ~ 840 ℃ preheating, 1190 ~ 1210 ℃ (salt bath) or 1200 ~ 1220 ℃ (box-type furnace) heating, oil cooling, 540 ~ 560 ℃ tempered 2 times 2h. 
 SKH53 delivery status 
 Hot rolling, forging, annealing cold-drawn steel bar to the state of delivery, hot-rolled, forged steel bar to annealing + other processing methods (peeling, light pull, polished, or polished, etc.) delivered after processing