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SS 410 is a heat treatable martensitic chromium stainless steel. Melt practice is controlled to develop a surface nearly free from defects. It provides the best combination of wear resistance and corrosion resistance, and is used in demanding medical accessories. The alloy can be cold formed from the annealed temper. Welding should be accomplished by pre and post heating. Pre-heating at 450° F and post-heated at 1300°F will prevent cracking. The corrosion resistance is optimized in the heat-treated temper and assured by passivation. It is resistant to water and organic materials, making it a good material to use in applications such as, rotary dies. Oxidation resistance remains favorable in most applications up through 1200°F. Density:7750 KG/m3 Melting Point (Approx.):1460°C Electrical Resistivity @ R.T.:57 Microhm·cm Thermal Expansion Coefficient (0° to 100°C):9.9 x 10-6/°C Thermal Conductivity @ 100°C:25.0 W/m·K Magnetic Permeability (Annealed: H= 200 oersteds):Yes

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SS 420 is a heat treatable martensitic chromium stainless steel. Melt practice is controlled to develop a surface nearly free from defects. It provides the best combination of wear resistance and corrosion resistance, and is used in demanding medical accessories, such as high quality surgical instruments. The alloy can be cold formed from the annealed temper.Welding should be accomplished by pre and post heating.Pre-heating at 450° F and post-heated at 1300° F will prevent cracking. The corrosion resistance is optimized in the heat treated temper and assured by passiviation. It is resistant to water and organic materials. Oxidation resistance remains favorable in most applications up through 1200°F. Density:0.28 lbs/cu.in. Melting Point (Approx.):1460°C Electrical Resistivity @ R.T.:55 Microhm·cm Thermal Expansion Coefficient (0° to 100°C):10.3 x 10-6/°C Thermal Conductivity @ 100°C:24.9 W/m·K Magnetic Permeability (Annealed: H= 200 oersteds):Yes