welding hastelloy c276

Hastelloy C-276 Alloy

Common Trade Names: Hastelloy C276, Alloy C-276, Nickel C-276; Nickelvac HC-276, Inconel C-276, Nicrofer 5716.

Alloy  (UNS N10276, W.Nr. 2.4819) is known for its corrosion resistance in a wide range of aggressive media. The high molybdenum content imparts resistance to localized corrosion such as pitting. The low carbon minimizes carbide precipitation during welding to maintain resistance to intergranular attack in heat-affected zones of welded joints. It is used in chemical processing, pollution control, pulp and paper production, industrial and municipal waste treatment and the recovery of “sour” natural gas. Applications in air pollution control include stack liners, ducts, dampers, scrubbers, stack-gas re-heaters, fans and fan housings. In chemical processing, the alloy is used for components including heat exchangers, reaction vessels, evaporators and transfer piping.

Hastelloy C-276 Alloy has excellent resistance to a wide variety of chemical process environments, including strong oxidizers such as ferric and cupric chlorides, hot contaminated media (organic and inorganic), chlorine, formic and acetic acids, acetic anhydride, and seawater and brine solutions. It is used in flue gas desulfurization systems because of its excellent resistance to sulfur compounds and chloride ions encounted in most scrubbers. C-276 alloy has excellent resistance to pitting and to stress-corrosion cracking. It is also one of the few materials that withstands the corrosive effects of wet chlorine gas, hypochlorite, and chlorine dioxide.

Available Product Forms:

Available Product Forms:
Rod, bar, forgings, wire, plate, sheet, strip, pipe, tube, pipe fittings. Flanges, Forged fittings, valve parts.

Specifications

Hastelloy alloy C-276 is designated as UNS N10276 and Werkstoff Nr. 2.4819. It is listed in NACE MR0175 for oil and gas service. 

Rod, Bar, Wire and Forging Stock: ASTM B 564,ASTM B472, ASTM B574
Plate, Sheet and Strip: - ASTM B 575

Pipe and Tube: - ASTM B622.

Pipe fittings: ASTM B366 WPHC-276

flanges, Forged fittings, valve parts: ASTM B462

Chemical Composition

Nickel ...............................................................................Balance 
Molybdenum...................................................................15.0-17.0
Chromium.......................................................................14.5-16.5 
Iron...................................................................................4.0-7.0 
Tungsten ..........................................................................3.0-4.5 
Cobalt ..............................................................................2.5 max. 
Manganese........................................................................1.0 max.
Carbon............................................................................0.01 max 
Vanadium........................................................................0.35 max. 
Phosphorus .....................................................................0.04 max. 
Sulfur .............................................................................0.03 max. 
Silicon ............................................................................0.08 max.

mechanical property:

specifications:

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