TGK SPECIAL STEEL PVT. LTD.

TPM M4 (Equivalent to ASP 2004) The powdered high speed steel with high content of vanadium has advantages of small carbide unevenness, high toughness, high hardness, and good wear resistance. Main application: Cold forging, fine punching, powder pressing C shearing machine, glass fiber- added plastic dies, etc.. Suitable for molds that bear vibration and impact load, such as deep-drawing or punching. Metal cutting blade, cold heading and extruding tool and so on. INTRODUCTION CHEMICAL CLEANLINENESS A THIN B C D THICK THICK THIN THIN THICK THICK THIN 0.5 0.5 1.5 1.0 1.5 1.0 1.5 1.0 SOFT ANNEALING O O O O Heating to 860 C~900 C for 3~5h in a protective atmosphere, followed by cooling down to 500 C at 10 C/h, and then air-cooling out of the furnace. STRESS RELIEF ANNEALING O O Heating to 750 C~800 C for 2h, then air-cooling out of the furnace. MICROSTRUCTURE AS ANNEALED This third-generation powdered high speed steel is made by hot isostatic pressing of the nitrogen gas atomized powders followed by forging and heat treatment. CHEMICAL COMPOSITION (%) C W Mo 1.33 V Cr 4.15 4.60 3.95 5.60 Eutectic Carbide Unevenness: 0, 100X Large Carbide Size: 3.3um, 500x O O Recommended quenching temperature: 1180 C-1200 C Quench-Temper Curve POWDER METALLURGY HIGH SPEED STEEL COMPARABLE STEELS TIANGONG TPMM4 US STANDARD ERASTEEL BOHLER M4 ASP2004 S690 DELIVERY STATE Delivery is annealed condition, annealing hardness 280HB. MICROSTRUCTURE AS POWDERED (1) The carbides are small and evenly distributed. The size of carbides 5um (the average size of 3 large carbides in 10 fields of view at 1000X). (2) The unevenness of eutectic carbide is not more than level 1. ULTRASONIC FLOW DETECTION Flaw detection standard: according to SEP1921-E/e level of flaw detection and GB/T6402-2008 level 4 of assessment or upon customer-specific requirements. Thickness 5mm - 205mm Width 5mm - 810mm SIZE: FLATS 4mm to 100mm SIZE: SQUARES Thickness 0.5mm to 12mm Width 810mm Length 2500mm SIZE: SHEETS SIZE: ROUND 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 19