Hastelloy C-276 Is a nickel-containing tungsten - chromium - molybdenum alloy, very low carbon content
of silicon is considered to be a panacea corrosion-resistant alloys. The main moisture chlorine, various
oxidizing chloride, chloride salts, sulfuric acid and oxidizing salt, in a low temperature and medium temperature hydrochloric acid has very good corrosion resistance. Thus, nearly three decades, corrosion in harsh environments, such as chemical, petrochemical, flue gas desulfurization, pulp and paper, environmental protection and other industrial fields has a very wide range of applications.

Densicity: 8.90g/cm3
Tensile Strength: ≥730Mpa
Elongation: ≥40%

C-276 alloy welding performance and common austenitic stainless steel is similar to using a welding method for welding C-276 before, we must take measures to make the corrosion resistance of the weld and heat affected zone the smallest decline, such as tungsten gas shielded arc welding (GTAW), gas metal arc welding (GMAW), submerged arc welding or some other can make the weld and heat affected zone the smallest decline in corrosion resistance welding method. But for such as oxy-acetylene welding material, it is likely to increase the weld and heat affected zone carbon or silicon content of the welding method is not suitable for use in.
About welded joints in the form of choice, you can reference the successful experience of the ASME Boiler and Pressure Vessel Code for Hastelloy C-276 alloy welded joints.

Welding groove machining method is preferable, but will bring machining hardened, so at the groove machined polished before welding is necessary.Welding heat input to the adoption of appropriate speed to prevent heat cracks.In most corrosive environment, Hastelloy C-276 alloy can be welded in the form of applications. But in a very harsh environment, C-276 material and welding parts to solution heat treatment in order to obtain the best corrosion resistance.Hastelloy C-276 alloy welding can choose their own material or filler metal for welding. When such request to add certain ingredients in the weld Hastelloy C-276 alloy, like other nickel-based alloy or stainless steel, and these welds will be exposed to the corrosive environment, then, welding rod or wire used is required and base metal corrosion resistance comparable performance.Hastelloy C-276 alloy material solution heat treatment consists of two processes: (1) heating at 1040 ℃ ~ 1150 ℃; (2) within two minutes of rapid cooling to the black state (about 400 ℃), the material thus treated It has good corrosion resistance. Therefore, only the Hastelloy C-276 alloy stress-relief heat treatment is ineffective. To clean up the oil before the heat treatment of the alloy surface, which may produce all the dirt of carbon during the heat treatment.Hastelloy C-276 alloy surface during welding or heat treatment will produce oxides of Cr in the alloy decreased, affecting corrosion resistance, so its surface cleaning. You can use stainless steel wire brush or a grinding wheel, then dipped in an appropriate.