TGK SPECIAL STEEL PVT. LTD. - HANDBOOK

The Name You Can Trust www.tgkssl.com - 23 - Descriptions and data in the file are typical cases. We will not make guarantee for them. Besides, we reserve the final right to interpret improvement in materials, quality and/or performance. Steel grade (M3) Smelting method: 15T intermediate frequency furnace +LF+VD+ESR Main characteristics: M3 is high-speed tool steel of tungsten and molybdenum system with high vanadium, for tools used for cutting requiring favorable abrasion resistance. Major applications:  Screw taps, turning tools, milling cutters, drilling bits, etc.  Cold forging molds. Chemical constituent %: C Si Mn W Cr Mo V Co P S 1.07 0.35 0.3 6.3 3.95 6.20 2.40 ≤0.025 ≤0.005 Physical property: Room temperature density (Kg/m 3 ) Specific heat of room temperature ( /Kg·K) 20ºC thermal conductivity (W/m•K) Elastic modulus (N/mm 2 ) Linear expansivity (×10 -6 K) 20~200ºC 20~400ºC 8.07 460 19 217,000 11.3 11.7 Ultrasonic flaw detection: As per SEP1921 D/d or customer requirements. Purity: Class A Class B Class C Class D Fine Coarse Fine Coarse Fine Coarse Fine Coarse 0.5 0.5 0.5 0.5 0.5 0.5 1.0 0.5 Delivery state: (1) Delivery under balling annealing state, delivery hardness ≤269HB. Supply specification: Product name Specification Round bar Ø2.5-257.125mm HIGH SPEED STEEL