Steel Mart manufactures High Speed Steels. Steel Mart is an ISO 9001-2000 certified company. The High Speed Steels include AISI/ ASTM EN DIN JIS C Si Mn Cr Mo V W Co Annealing [Slow Cooling] Quenchants [Hot Bath] Quenching Tempering [Air Cooling] Annealed [hb]-max Quenched & [hrc] Tempered M2 6/5/2 1.3343 SKH51 0.9 0.3 4.1 5 1.8 6.4. These are used to make taps, twist drills, reamers, broach tools, cold work tools. 800-880 OIL 1200-1240 550-570 255 63 M35 6/5/2+5% 1.3243 SKH55 0.92 0.35 0.3 4.1 5 1.9 6.4 4.8 as M2, hobs, drill reamers, milling cutters; 800-840 OIL 1200-1240 550-570 277 64 M42 2/10/1/8 1.3247 SKH59 1.1 0.25 0. 25 3.9 9.2 1.2 1.4 7.8 as taps, remers, broaching tools, twist drills. 820-840 OIL 1170-1210 520-590 285 66 T1 18/4/1 1.3355 SKH2 0.75 0.2 0. 2 4.1 1.1 18 Turning, planning, Slotting tools, threading dies 820-880 OIL 1250-1290 560-580 248 62 T4 18/1/2/5 1.3256 SKH4 0.81 0.25 0. 25 4.3 0.65 1.5 18 4.8 same as T1 840-900 OIL 1260-1300 570-590 262 63 T42 10/4/3/10 1.3207 SKH57 1.26 0.23 0. 23 4 3.6 3.2 9.3 10 highly stressed tools and tool bits 820-880 OIL 1210-1250 550-580 285 64.
