CHEMICAL COMPOSITION

EST DIN ASTM CHEMICAL COMPOSITION PROPERTY APPLICATION
C Si Mn Cr Mo V W Co
DF6 1.3343 M2 0.86-0.94 0.20-0.45 0.20-0.40 3.75-4.50 4.50-5.50 1.70-2.10 5.50-6.70 - Excellent combination of wear resistance, toughness and hot hardness. Superior compressive strength for deformation resistance, reducing susceptibility to , denting and edge rollover.   For all kind of wear resisting tools that bear vibration, Like Lathe tools, Planer tools, Drills, Taps, Reamers, Broaches, Milling cutters, Form cutters, Thread chasers, End mills, Gear cutters
DF35 1.3243 M35 0.87-0.95 0.20-0.45 0.20-0.45 3.75-4.50 4.50-5.50 1.70-2.10 5.50-6.70 4.50-5.00 Cobalt added  M2 high speed steel in which the cobalt addition provides hot hardness, The improved hot hardness makes the steel suitable for machining high-strength and prehardened steels, high-hardness alloys Twist drills, taps, milling cutters, reamers, broaches, saws, knives, and hobs.
DF42 1.3247 M42 1.05-1.15 0.15-0.65 0.15-0.40 3.50-4.25 9.0-10.0 0.95-1.35 1.15-1.85 7.75-8.75 A premium cobalt high speed steel with very high hardness and superior hot hardness, excellent wear resistance by virtue of high heat-treated hardness, stay sharp and hard in heavy-duty and high-production cutting applications For complicated and accurate cutting tools for hard and high speed cutting, twist drills, taps, milling cutters, reamers, broaches, saws, knives, and thread rolling dies.
DF18 1.3355 T1 0.65-0.75 0.20-0.45 0.20-0.45 3.75-4.50 - 0.90-1.30 17.25-18.75 - Tungsten based HSS, Good combination of toughness and red hardness. High  resistance to wear and softening. Relatively easy to harden. Twist drills, screw cutting tools, milling cutters, file cutter's chisels, lathe tools, planer tools, shaving tools.

Heat Treatment

EST DIN ASTM Density (g/cm3) HEAT TREATMENT
Soft Annealing °C Annealed Hardness HB Warm up °C Preheating Step 1 °C Preheating Step 2 °C Hardening From °C Quenching In Hardened Hardness HRC Tempering °C
300 °C 400 °C 500 °C 550 °C 600 °C 650 °C
HRC HRC HRC HRC HRC HRC
DF6 1.3343 M2 8.1 790-840 Max. 255 450-600 850 1050 1210-1230 OIL / AIR Hot Bath 550 °C 63-66 61.5 62 65 65 63 57
540 – 560 x 1 h x 3 Times 63 - 66
DF35 1.3243 M35 8.1 790-840 Max. 265 450-600 850 1050 1200-1220 OIL / AIR Hot Bath 550 °C 64-66 62 62 64 65 63 56
540 – 560 x 1 h x 3 Times 64 - 66
DF42 1.3247 M42 8 790-840 Max. 265 450-600 850 1050 1170-1190 OIL / AIR Hot Bath 550 °C 66-68 60.5 61.5 66 68 64 50
540 – 560 x 1 h x 3 Times 63 - 65
DF18 1.3355 T1 8.7 810.860 Max. 269 450-600 850 1050 1270-1290 OIL / AIR Hot Bath 550 °C 63-65 63 62 65 65 63 58
540 – 560 x 1 h x 3 Times 63 - 65