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PYROMET 31是一种镍基超合金,在温度高达816℃时仍保持很高的耐蚀性与强度。对于在载重汽车和机车柴油机阀门中可能出现的热硫侵蚀,这种合金具有优异的耐蚀性。合金的名义成分(%)如下:碳 0.04锰 0.20(最大值)硅 0.20(最大值)磷 0.015(最大值)硫 0.015(最大值)铬 22.7镍 55.5钼 2.0钛 2.3铝 1.3铌 0.85硼 0.005铁余量。合金的物理常数:密度(克/厘米~3) 7.992熔点(℃) 1232—1327比热(千焦耳/公斤·k) 0.50(21-60℃)热膨胀系数 /°F
PYROMET 31 is a nickel-based superalloy that retains high corrosion resistance and strength at temperatures up to 816 ° C. This alloy has excellent corrosion resistance for thermal sulfur attack that may occur in truck and locomotive diesel valves. The nominal composition (%) of the alloy is as follows: Carbon 0.04 Manganese 0.20 (Maximum) Silicon 0.20 (Maximum) Phosphorus 0.015 (Maximum) Sulfur 0.015 (Maximum) Chromium 22.7 Nickel 55.5 Molybdenum 2.0 Titanium 2.3 Aluminum 1.3 Niobium 0.85 Boron 0.005 Iron margin. Physical Constants of Alloys: Density (g / cm 3) 7.992 Melting Point (℃) 1232-1327 Specific Heat (kJ / kg · k) 0.50 (21-60 ℃) Thermal Expansion Coefficient / ° F