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High Speed Tools Steel
High Speed Steel
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(W.Nr) (DIN) 
AISI M-2 1.3343 HS6-5-2 SKH51 W6Mo5Cr4V2 SW7M
AISI M-35  1.3243 HS6-5-2-5 SKH55 W6Mo5Cr4V2Co5 SK5M
AISI M-42 1.3247 HS2-10-1-8 SKH59 W2Mo9Cr4VCo8 SK8M
AISI T-1  1.3355 HS18-0-1 SKH2 W18Cr4V SW18
AISI T-4 1.3255 HS18-1-2-5 SKH3 W18Cr4VCo5 -
AISI T-5 1.3265 HS18-1-2-10 SKH4 W18Cr4VCo8 -
AISI T-42 1.3207 HS10-4-3-10 SKH57 - SK10V
Chemical Composition
C Si Mn Cr Mo V W Co Ni
AISI M-2 0.78-0.88 0.20-0.40 0.20-0.40 3.75-4.50 4.50-5.50 1.60-2.20 5.50-6.75
AISI M-35 0.85-0.95 0.00-0.40 0.00-0.40 3.75-4.50 4.75-5.25 1.75-2.15 6.00-6.75 4.60-5.20 0.00 - 0.40
AISI M-42 1.05-1.15 0.15-0.65 0.15-0.40 3.50-4.25 9.00-10.00 0.95-1.35 1.15-1.85 7.75-8.75
AISI T-1  0.65-0.75 0.20-0.40 0.20-0.40 3.75-4.50 - 0.90-1.30 17.25-18.75
AISI T-4 0.70-0.80 0.20-0.40 0.20-0.40 3.75-4.50 0.70-1.00 0.80-1.20 17.25-18.75 4.25-5.75
AISI T-5 0.75-0.85 0.20-0.40 0.20-0.40 3.75-4.50 0.70-1.00 1.80-2.40 17.50-19.00 7.00-9.00
AISI T-42 1.25-1.40 0.00-0.40 0.00-0.40 3.75-4.50 2.75-3.50 2.75-3.25 8.50-9.50 9.00-10.00 0.00- 0.40