High Speed Steel By B. K. Steel Company

 Equivalent Grades of high speed steelSheets Flat Bars Rounds Coils Equivalent Grades American (AIAI) (W.Nr) German (DIN) Japanese (JIS) Bohler Assab M-2 1.3343 HS6-5-2 SKH51 S600 M-35 1.3243 HS6-2-5 SKH55 S705 M-42 1.3247 HS2-10-1-8 SKH59 S500 T-1 1.3355 HS18-0-1 SKH2 S200 T-4 1.3255 HS18-1-2-5 SKH3 S305 T-5 1.3265 HS18-1-2-10 SKH4 S300 T-42 1.3207 HS10-4-3-10 SKH57 Chemical composition C Si Mn P S Cr Mo V W Co Ni M-2 0.78-0.88 0.20-0.40 0.20-0.40 3.75-4.50 4.50-5.50 1.60-2.00 5.50-6.75 M-35 0.85-0.95 0.40 max 0.40 max 3.75-4.50 4.75-5.25 1.75-2.15 6.00-6.75 4.60-5.20 0.40 Ma 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 T-1 0.65-0.75 0.20-0.40 0.20-0.40 3.75-4.50 0.90-130 17.25-18.75 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 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 T-42 1.25-1.40 0.40 max 0.40 max 3.75-4.50 2.75-3.50 2.75-3.25 8.50-9.50 9.00-10.00 0.40 Ma