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鋼種
steel grade		 規格記號
SYMBOL		 化學成分(重量%)
chemical composotion (Weight%)
KS GB JIS DIN BS AISI C SI Mn P S Cu Ni Cr Ni+Cr Mo W V
碳素鋼
carbon steel		 S45CM 45 S45CM C45 060A47 1045 0.42-0.48 0.15-0.35 0.60-0.90 0.030MAX 0.035MAX 0.30MAX 0.20MAX 0.20MAX 0.35MAX - - -
S50CM 50 S50CM C50 060A52 1050 0.47-0.53 0.15-0.35 0.60-0.90 0.030MAX 0.035MAX 0.30MAX 0.20MAX 0.20MAX 0.35MAX - - -
S55CM 55 S55CM C55 060A57 1055 0.52-0.58 0.15-0.35 0.60-0.90 0.030MAX 0.035MAX 0.30MAX 0.20MAX 0.20MAX 0.35MAX - - -
S60CM 60 S60CM C60 060A62 1060 0.55-0.65 0.15-0.35 0.60-0.90 0.030MAX 0.035MAX 0.30MAX 0.20MAX 0.20MAX - - - -
S65CM 65 S65CM - 060A67 1065 0.60-0.70 0.15-0.35 0.60-0.90 0.030MAX 0.035MAX 0.30MAX 0.20MAX 0.20MAX - - - -
S70CM - S70CM - - - 0.65-0.75 0.15-0.35 0.60-0.90 0.030MAX 0.035MAX 0.30MAX 0.20MAX 0.20MAX - - - -
S75CM - S75CM - - - 0.70-0.80 0.15-0.35 0.60-0.90 0.030MAX 0.035MAX 0.30MAX 0.20MAX 0.20MAX - - - -
碳素工具鋼
carbon tool steel		 SK2M T12 SK2M C125W2 BW1C W112 1.10-1.30 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 0.25MAX 0.20MAX - - - -
SK3M T10 SK3M C105W2 BW1B W110 1.00-1.10 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 0.25MAX 0.20MAX - - - -
SK4M - SK4M - - W109 0.90-1.00 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 0.25MAX 0.20MAX - - - -
SK5M T8 SK5M C105W2 BW1B W108 0.80-0.90 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 0.25MAX 0.20MAX - - - -
SK6M - SK6M - - - 0.70-0.80 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 0.25MAX 0.20MAX - - - -
SK7M - SK7M - - - 0.60-0.70 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 0.25MAX 0.20MAX - - - -
合金工具鋼
alloy tool steel　　　　		 SKS 2M CrW SKS 2M 　 　   1.00-1.10 0.35MAX 0.80MAX 0.030MAX 0.030MAX 0.25MAX 0.25MAX 0.50-1.00 - - 1.00-1.50 0.2MAX
SKS 5M - SKS 5M 　   　 0.75-0.85 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 0.70-1.30 0.20-0.50 - - - -
SKS 51M - SKS51M 　 　 　 0.75-0.85 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 1.30-2.00 0.20-0.50 - - - -
SKS 7M W2 SKS 7M 　 　 　 1.10-1.20 0.35MAX 0.50MAX 0.030MAX 0.030MAX 0.25MAX 0.25MAX 0.20-0.50 - - 2.00-2.50 0.2MAX
SKS95M - SKS95M 　 　 　 0.80-0.90 0.50MAX 0.80-1.10 0.030MAX 0.030MAX 0.30MAX 0.25MAX 0.20-0.60 - - - -
Cr-Mo steel SCM 415M 15CrMo SCM415M 15CrMo5 1501-620 　 0.13-0.18 0.15-0.35 0.60-0.85 0.030MAX 0.030MAX 0.30MAX 0.25MAX 0.90-1.20 - 0.15-0.30 - -
SCM430M 30CrMo SCM430M 55CrMo4 708A25 4130 0.28-0.33 0.15-0.35 0.60-0.85 0.030MAX 0.030MAX 0.30MAX 0.25MAX 0.90-1.20 - 0.15-0.30 - -
SCM435M 35CrMo SCM435M 34CrMo4 708A37 4135 0.33-0.38 0.15-0.35 0.60-0.85 0.030MAX 0.030MAX 0.30MAX 0.25MAX 0.90-1.20 - 0.15-0.30 - -
SCM440M 42CrMo SCM440M 42CrMo4 708M40 4140 0.38-0.43 0.15-0.35 0.60-0.85 0.030MAX 0.030MAX 0.30MAX 0.25MAX 0.90-1.20 - 0.15-0.30 - -
Spring steel SUP 6M 60Si2Cr4 SUP 6M 60Si7 - - 0.56-0.64 1.50-1.80 1.70-1.00 0.035MAX 0.035MAX 0.30MAX - - - - - -
SUP 9M 55CrMnA SUP 9M 55Cr3 527A40 5155 0.52-0.60 0.15-0.35 0.65-0.95 0.035MAX 0.035MAX 0.30MAX - 0.65-0.95 - - - -
SUP 10M 50CrVA SUP 10M 50CrV4 735A50 6150 0.47-0.55 0.15-0.35 0.65-0.95 0.035MAX 0.035MAX 0.30MAX - 0.80-1.10 - - - 0.15-0.25