素材

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KS JIS AISI/SAE DIN 硬度
炭素鋼 S55C S55C 1055 CK55 / C55 20-29 HRC
プラスチック金型鋼 TP1 S55C 1050 1.121 190-210 HB
TP4 SCM440 4140 1.2311 25-30 HRC
TP4M SNCM P20 1.2738 30-33 HRC