hastelloy-c276

Hastelloy® Alloy C-276 (UNS N10276) Ni 57.0, Mo 16.0, Cr 15.5, Fe 5.5, W 3.8

Hastelloy C276 is a Outstanding corrosion resistance in reducing and oxidizing environments. Maintains corrosion resistance in welded condition. Excellent resistance to pitting and stress-corrosion cracking (SCC).Widely used in severest environments in chemical processing, pollution control, pulp and paper.

Nickel-chromium-molybdenum wrought alloy that is considered the most versatile corrosion resistant alloy available. This alloy is resistant to the formation of grain boundary precipitates in the weld heat-affected zone, thus making it suitable for most chemical process applications in an as welded condition.

Alloy C-276 also has excellent resistances to pitting, stress-corrosion cracking and oxidizing atmospheres up to 1900 °F. Alloy C-276 has exceptional resistance to a wide variety of chemical environments.Some typical applications include equipment components in chemical and petrochemical organic chloride processes and processes utilizing halide or acid catalysts. Other industry applications are pulp and paper (digesters and bleach areas), scrubbers and ducting for flue gas desulfurization, pharmaceutical and food processing equipment.

Hastelloy C-276 is a alloy with universal corrosion resistance unmatched by any other alloy. Alloy C-276 also resists formation of grain boundary precipitates in the weld heat affected zone making it useful for most chemical processes in the as-welded condition. It has excellent resistance to pitting and stress corrosion cracking.


Characteristics

  • 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 Analysis of Alloy C276 (UNS N10276)

 

C
MN
P
S
Si
Cr
Ni
Mo
Co
Fe
W
V
.01 max
1.00 max
0.04
.03 max
.08 max
14.5 – 16.5
rem
15.0 -17.0
2.5 max
4.0 – 7.0
3.0 – 4.5
.35 max
max

 

Mechanical Properties

Typical Room Temperature Tensile Properties of Annealed Material

Product Form
Tensile (ksi)
.2% Yield (ksi)
Elongation %
Plate
107.4
50.3
67
Sheet
115.5
54.6
60

 

Applications

  • 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

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