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China, Chinese Pm M4 Powder Metallurgy High Speed Tool Carbon Steel1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Steel ProductsAlloy SteelSteel BarSteel Sheet
Huangshi Smooth Industry and Trade Co., Ltd
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Product Description PM M4This high-speed tool steel epitomizes versatility, boasting an extraordinary blend of high wear-resistance, superior impact toughness, and remarkable bend strength. These attributes stem from its fine grain size, minuscule carbides, and exceptional cleanliness. PM M4delivers superior cutting tool longevity when compared to traditionally-wrought M1,M2,M7,and other lower-alloyed high-speed steels. PM M4 outperforms high-carbon, high-chromium die steels like D2 and D3 in cold work tooling applications.Other Known Names:CPM REX M4 steel?, ASP 2004, S690Common UsageIdeal for Broaches, End Mills, Punches, Hobs, Fine Blanking, and Forming Dies.Physical PropertiesDensity:0.286 lb/in3(7806 kg/m3)Specific Gravity:7.92Modulus Of Elasticity:31 x 106psi (214 GPa)Machinability:40-45% of 1% carbon steelPM M4 High Speed Steel Chemical Composition MAXIMUMTYPICALCarbonChromiumTungstenMolybdenumVanadiumCobaltAnnealedTemperedCCrWMoVCoHbHrC1.445.655.24-25565 PM M4 High Speed Steel Heat TreatingANNEALINGPREHEATAUSTENITIZINGQUENCHTEMPERINGTempTempTempMediumTemp°F°F°F °F1550/16001500/15502175/2220Salt/Oil/Atm1025/1050 PM M4 High Speed Steel Thermal TreatmentsPreheating:Gradually heat at a maximum rate of 400°F per hour (222°C per hour) to 1500-1600°F (816-871°C), then equalize.Austenizing (High Heat):Heat rapidly from the preheat stage.For Cutting Tools:Soak for 5 to 15 minutes.Furnace: 2150-2175°F (1177-1191°C)Salt Bath: 2125-2175°F (1163-1191°C)For Cold Work Tooling:Soak for 20 to 45 minutes.Furnace: 1875-2125°F (1023-1163°C)Salt Bath: 1850-2100°F (1010-1149°C)To maximize toughness, opt for the lowest temperature. For optimal hot hardness, select the highest temperature.Quenching:Utilize pressurized gas, warm oil, or salt.For pressurized gas, the furnace should maintain a minimum quench pressure of 4 bars. Achieve a quench rate of roughly 400°F (222°C) per minute down to below 1000°F (538°C) to secure the desired properties.For oil quenching, quench until black (about 900°F or 482°C), then let cool in still air to 150-125°F (66-51°C).To maintain optimal salt conditions, hold the temperature steady at 1000-1100°F (538-593°C). Let the material equalize in the salt bath, then allow it to cool in still air until it reaches 150-125°F (66-51°C).Tempering:Begin tempering immediately after quenching to preserve the material's properties.The recommended tempering temperature range is 1000-1100°F (538-593°C). Ensure not to temper below 1000°F (538°C). Maintain the material at the tempering temperature for 2 hours, followed by air cooling to ambient temperature. Double tempering is essential, and triple tempering is mandatory when austenitized at 2100°F (1149°C) or higher.Annealing:Annealing should be performed post hot-working and prior to re-hardening to ensure material stability.Heat the material at a controlled rate not exceeding 400°F per hour (222°C per hour) until reaching 1550-1600°F (843-871°C). Maintain this temperature for a minimum of 2 hours, or 1 hour per inch (25.4 mm) of thickness. Gradually cool with the furnace at a rate not exceeding 50°F per hour (15°C per hour) until it reaches 1000°F (538°C). Continue cooling to ambient temperature, either in the furnace or in open air.
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