Although there are several variations of the Hastelloy nickel alloy,  Hastelloy C-276 is by far the most widely used.

Alloy C-276 is widely used in the most severe environments such as chemical  processing, pollution control, pulp and paper production, industrial and  municipal waste treatment, and recovery of sour natural gas.

Corrosion Resistant Hastelloy C276

Considered one of the most versatile corrosion resistant alloys available,  Hastelloy C-276 exhibits excellent resistance in a wide variety of chemical  process environments including those with ferric and cupric chlorides, hot  contaminated organic and inorganic media, chlorine, formic and acetic acids,  acetic anhydride, seawater, brine and hypochlorite and chlorine dioxide  solutions. In addition, alloy C-276 resists formation of grain boundary  precipitates in the weld heat affected zone making it useful for most chemical  processes in the as-welded condition. This alloy has excellent resistance to  pitting and stress corrosion cracking.

What are the characteristics of Hastelloy C276?

· Excellent corrosion resistance in reducing environments

· Exceptional resistance to strong solutions of oxidizing salts, such as  ferric and cupric chlorides

· High nickel and molybdenum contents providing good corrosion resistance in  reducing environments

· Low carbon content which minimizes grain-boundary carbide precipitation  during welding to maintain resistance to corrosion in heat-affected zones of  welded joints

· Resistance to localized corrosion such as pitting and stress-corrosion  cracking

· One of few materials to withstand the corrosive effects of wet chlorine  gas, hypochlorite and chlorine dioxide

Chemical Composition, %

In what applications is Hastelloy C-276 used?

· Pollution control stack liners, ducts, dampers, scrubbers, stack-gas  reheaters, fans and fan housings

· Flue gas desulfurization systems

· Chemical processing components like heat exchangers, reaction vessels,  evaporators, and transfer piping

· Sour gas wells

· Pulp and paper production

· Waste treatment

· Pharmaceutical and food processing equipment

Fabrication with Hastelloy C-276

Hastelloy C-276 alloy can be forged, hot-upset and impact extruded. Although  the alloy tends to work-harden, you can have it successfully spun, deep-drawn,  press formed or punched. All of the common methods of welding can be used,  although the oxyacetylene and submerged arc processes are not recommended when  the fabricated item is for use in corrosion service.

For more information on fabrication and machining click here.

Hastelloy C-276 Welding Material

Alloy C276 welding products are used as matching composition filler material  for welding C276 alloy wrought and cast products, for dissimilar welding  applications including other nickel-chromium-molybdenum alloys and stainless  steels, and for weld overlay or cladding of steels.

Specifiacations: ASME-SFA-5.14 ERNiCrMo-4

Forms of C276 Filler Metal Available at Mega Mex

· .031 in or .8 mm in diameter

· .035 in or .9 mm in diameter

· .039 in or 1.0 mm in diameter

· .045 in or 1.1 mm in diameter

· .047 in or 1.2 mm in diameter

· .062 in or 1.6 mm in diameter

· .078 in or 2.0 mm in diameter

· .093 in or 2.4 mm in diameter

· .125 in or 3.2 mm in diameter

Filler metals are available in spools and in cut lengths from the above  diameters. Straight lengths are available in 36″ lengths.

ASTM Specifications

Mechanical Properties

Typical Room Temperature Tensile Properties of Annealed Material