TGK SPECIAL STEEL PVT. LTD. - HANDBOOK

The Name You Can Trust www.tgkssl.com - 13 - 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 (TGM2B) Smelting method: 15T intermediate frequency furnace +LF+VD+ ESR Main characteristics: Favorable tenacity, high red hardness and excellent abrasion resistance. Chemical constituent %: Major applications:  Due to favorable hardness and abrasion resistance, it’s mainly used to fabricate tools to cut materials which are difficult to be cut. It’s mainly used as various cutting tools, for example, drilling bits, screw taps, milling cutters, drawing tools, roller cutters, etc. C W Mo Cr V Co P S 0.89 6.2 4.8 4.15 1.9 -- ≤0.026 ≤0.003 Physical property: Room temperature density (g/cm 3 ) Specific heat of room temperature (J/g.K) 20ºC thermal conductivity (W/m•K) Elastic modulus (N/mm 2 ) Resistivity (Ohm mm 2 /m) 8.12 0.46 19.0 217,000 0.54 O (ppm) N (ppm) H (ppm) ≤20 ≤100 ≤2.5 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. PRODUCTION PROCESS: EAF LF VD ESR BLOOM IN FOLLOWING MACHINE : QUICK FORGING (12.5MN), HAMMER, PRECISION FORGING Precision Forging Hot Rolled & Annealed Peeled Cold Draw / Sand Blasted (Coil) Cold Drawn Centerless Ground : 81-255mm : 14.5-80.0mm : 2.0-13.5mm : 2.0-14.4mm SIZE : Rounds Cold Drawn/Ground Bar 2.0 - 14.4mm 14.5-80.0mm Hot Rolled Annealed & Peeled 81.0-255.0mm 2.0-13.5mm Forged+Annealed+Turned Bar Coil HIGH SPEED STEEL