Performance and Use of Hastelloy C-276
Hastelloy C-276 alloy is a nickel-chromium-molybdenum alloy containing tungsten with extremely low silicon-carbon content and is considered a universal anti-corrosion alloy.
Properties of Hastelloy
- Corrosion resistance
Hastelloy alloy materials are mainly resistant to wet chlorine, various oxidizing chlorides, chloride salt solutions, sulfuric acid and oxidizing salts, and have good corrosion resistance in low and medium temperature hydrochloric acid. Therefore, in the past 30 years, in harsh corrosive environments, such as chemical industry, petrochemical industry, flue gas desulfurization, pulp and paper, environmental protection and other industrial fields, it has been widely used.
The alloy has the following characteristics:
①It has excellent corrosion resistance to most corrosive media in both oxidation and reduction atmospheres.
②It has excellent resistance to pitting, crevice corrosion and stress corrosion. The higher content of Mo and Cr makes the alloy resistant to chloride ion corrosion, and the element W further improves the corrosion resistance. At the same time, Hastelloy C-276 alloy is one of the only materials resistant to corrosion by moist chlorine, hypochlorite and chlorine dioxide solutions. It is effective for high-concentration chloride solutions such as ferric chloride and copper chloride. Significant corrosion resistance. It is suitable for sulfuric acid solutions of various concentrations and is one of the few materials that can be applied to hot concentrated sulfuric acid solutions.
- Mechanical properties
Tensile strength: σb≥730Mpa, elongation: δ≥40%.
Hot forming of Hastelloy C-276 alloy is annealed immediately at 1150°C and quenched with water. Cold deformation of Hastelloy C-276 alloy will increase its strength.
Hastelloy C-276 alloy and ordinary austenitic stainless steel have similar forming properties. But because it is stronger than ordinary austenitic stainless steel, it will have greater stress during cold forming. In addition, the work hardening speed of this material is much faster than ordinary stainless steel, so in the process of extensive cold forming processing, halfway annealing treatment is required.
- Physical properties
The physical properties of Hastelloy C-276 alloy are as follows:
Executive standard: UNS N10276, ASTM B575, ASME SB575, DIN/EN 2.4819
Chemical composition of Hastelloy C-276
Uses of Hastelloy C-276
Hastelloy products are widely used in petrochemical equipment, heat exchangers, flue gas desulfurization equipment, fluid chemical pumps, and fluorine chemicals.
Eternal Bliss Alloy Casting & Forging Co, Ltd.
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