Commonly used hartz alloys Hastelloy C - 276 alloy (hartz alloy C - 276)

Corrosion resistant performance hartz C - 276 alloy belongs to nickel - chromium molybdenum - - iron - tungsten nickel base alloy. It is a modern one of the most corrosion resistant metal materials. Main wet chlorine, all kinds of oxidation resistance chloride, LvHuaYan solution, acid and oxidizing salt, in low temperature and temperature in the hydrochloric acid have good corrosion resistance. As a result, nearly 30 years, corrosion in the harsh environment, such as chemical industry, petrochemical industry, such as flue gas desulfurization, pulp and paper making, environmental protection industry has a wide application.

Hartz C - 276 alloy has its typicality of various corrosion data, but cannot be used as a standard, especially in the unknown environment, have to pass test to select material. Hartz C - 276 alloy in not enough Cr to resist the corrosion of strong oxidizing environment, such as hot nitric acid. The generation of this alloy is mainly aimed at chemical process environments, especially in the presence of mixed acid, such as flue gas desulfurization system of discharge tube, etc. Four kinds of alloys are listed in the table below the contrast test of corrosion under different environment conditions. (all welding sample using the melt tungsten argon arc welding)

Physical properties of density: 8.90 g/cm3, specific heat: 425 j/kg/k, modulus of elasticity: 205 gpa (21 °C)

Mechanical performance of typical C - 276 alloy tensile test results shown in the table below, the material is at 1150 °C annealing and quenching in water.

Mechanics performance test values

The temperature (°C) yield strength sigma 0.2 (Mpa), tensile strength (Mpa), elongation of the delta sigma b 5 (%)

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