TGK SPECIAL STEEL PVT. LTD.

HIGH SPEED STEEL TG M2 (DIN-1.3343) TG M2A (Sp. Grade or taps) TG M2B (Sp. Grade for hobs & broaches) JAPAN CHINA TG TGM2 BRAZIL VILLARES VW/M2 AUSTRIA BOHLER S600 GERMANY DEW 1.3343 SLOVANIA RAVNE BRM2 HITACHI YXM1 NIPPON H51 SANYO QH51 SIMILAR STEEL GRADE M2A M2A has Lower Carbon than M2 making it tougher than M2 and has added Niobium to obtain high strength and toughness. M2B Favourable Tenacity, High red hardness and excellent abrasion resistance STEEL PROPERTIES M2A This grade is especially suitable for tabs of tread tools M2B Due to favourable hardness and abrasion resistance, its mainly used to fabricate tools to cut materials which are difficult to be cut. It is used as various cutting tools, for example, drilling bits, screws taps, milling cutters, drawing tools, roller cutters etc. APPLICATIONS HEAT TREATMENT ANNEALING : O O O Annealing temperature: 860-880 C, keep this temperature by 2-4 hours, then cooling to 600 C in the speed of less than 30 C/h if after O cold drawn precess, suggest and stress relieving annealing process. Under the temperature of 600-700 C, keep this temperature by 2 houres. Quenching & Tempering (salt bath). QUENCHING : Pre-heating in two steps : O O Heating temperature under : 400-500 C and 850-900 C O Austenitizing temperature : 1185-1225 C O Heating coefficient 10-15 sec/mm, quenching under 580-620 C, then cooling to room temperature. TEMPERING : O Tempering temperature under : 540-560 C, tempering 3 times, each time 1 hour, then cooling to room temperature. Indian Chemical Analysis Typical Value % (Min - Max) Delivery Condition IS S P Si Mn Cr Mo V W Nb Heat Treatment Hardness C M2 <0.03 <0.03 0.20- 0.45 0.20- 0.40 3.80- 4.50 4.70- 5.20 1.70- 2.10 5.90- 6.70 *** Annealed <255 HB M2A 0.86- 0.94 0.83- 0.85 Max 0.010 Max 0.030 0.30- 0.40 0.20- 0.40 3.90- 4.20 4.80- 4.85 1.80- 1.90 6.00- 6.20 0.10- 0.20 Annealed <255 HB M2B 0.89 <0.03 <0.026 4.15 4.80 1.90 6.20 Annealed <255 HB 0.30- 0.40 0.20- 0.40 CHEMICAL COMPOSITION (%) UNDER ANNEALED CONDITION : Hardness : HB205-255 DELIVERY STATUS : As Cold drawn / Hot rolled / forged, in annealed condition. REDUCTION RATIO : As 1:4 or 1:5 PRODUCTION PROCESS EAF LF VD ESR BLOOM IN FOLLOWING MACHINE : QUICK FORGING (12.5MN), HAMMER, PRECISION FORGING Precision Forging Hot Rolled & Annealed Peeled (HRAP) Cold Drawn / Sand Blasted (Coil) Cold Drawn / Centreless Ground : 81 - 255mm : 14.5 - 80.0mm : 1.0 -13.5mm : 1.0 -14.4mm SIZE: ROUND Thickness 5mm - 205mm Width 5mm - 810mm 4mm to 100mm Thickness 0.5mm to 12mm Width 810mm Length 2500mm SIZE: FLATS SIZE: SQUARES SIZE: SHEETS Cold Drawn/Centreless Ground Bar Coil 1.0 - 13.5mm Forged & Turned bar 81.0 - 255.0mm Hot Rolled Peeled & Polish Bar 14.5 - 80.0mm 1.0 - 14.4mm 0.10- 0.20 8