Steel type Equivalent JIS steel Hardening and annealing hardness Features Application example KMX1 　 45〜55HRC High-tenacity matrix high- speed steel Warm forging KMX2 　 57〜62HRC General-purpose matrix high- speed steel Cold-precision forging KMX3 　 60〜65HRC High-wear-resistance matrix high-speed steel Press dies, roll dies, rolls H51 SKH51 60〜65HRC General-purpose matrix high- speed steel Drills, end mills, press dies HM35 SKH55 60〜66HRC Heat-resistant, wear-resistant high-speed steel End mills, hobs, press dies HM36 SKH56 60〜66HRC Heat-resistant, wear-resistant high-speed steel End mills, hobs, press dies MV10 SKH57 62〜67HRC Heat-resistant, wear-resistant high-speed steel Bites, end mills, hobs HM42 SKH59 62〜67HRC Heat-resistant, wear-resistant high-speed steel Bites, end mills, hobs S70 　 65〜70HRC Hard wear-resistant high- speed steel Drills, end mills, bites

●Recommended! High performance equivalent to the SKH51 offers superior cost performance. Ideal for metal molds and wear-resistant parts. The S70 is a fruit of KOSHUHA's long know-how and experience in the high-speed steel industry. It offers the ultimate hardness of HRC70 as soluble high-speed steel.

●Position of high-speed steel characteristics

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