Hastelloy C-276, also known as Alloy C276, is a nickel-molybdenum-chromium alloy with a trace quantity of tungsten that has been reinforced by solid solution. Excellent corrosion resistance is displayed by Alloy C-276 in a number of challenging environments and media. It is ductile, readily made, and weldable, like many other nickel alloys. Most industrial applications where there are special chemical environments and other alloys have failed adopt this alloy.
Applications:
The manufacturing of pulp and paper, oil and gas, electricity generation, pharmaceutical, chemical and petrochemical processing, and waste water treatment are just a few of the industries that regularly use Hastelloy C-276. Stack liners, ducts, dampers, scrubbers, stack gas reheaters, heat exchangers, reaction vessels, evaporators, transfer pipework, and several more extremely corrosive applications are examples of end use applications.
Chemical Composition:
| Element | Percentage |
|---|---|
| Nickel ( Ni ) | 55% - 63% |
| Molybdenum ( Mo ) | 15% - 17% |
| Chromium ( Cr ) | 14.5% - 16.5% |
| Iron ( Fe ) | 4% - 7% |
| Carbon ( C ) | 0.01% |
| Other: | |
| Cobalt ( Co ) | 2.5% |
| Tungsten ( W ) | 3% - 4.5% |
Corrosion Rating:
RATINGS - 0:Unsuitable 1:Poor to Fair 2:Fair 3:Fair to good 4:Good 5:Good to Excellent 6:Normally Excellent
| Materials | Non-oxidizing or reducing media | Liquids | Gases | |||||||
| Acid solutions excluding Hydrochloric, phosphoric, sulfuric | Neutral solutions, e.g. many Non-oxidizing salt solutions, chlorides, sulfates | Alkaline solutions | Oxidizing Media | Halogen & derivatives | ||||||
| Caustic & mild alkalis, excluding ammonium hydroxide | Ammonium hydroxide & amines | Acid solutions, e.g. nitric | Neutral or alkaline solutions e.g. per sulfates, peroxides, chromates | Pitting media, acid ferric chloride solutions | Halogen | Hydrogen halides, dry, e.g., dry, hydrogen chloride | ||||
| Moist, e.g. chlorine below dew point | Dry, e.g. fluorine above dew point | |||||||||
| Alloy C276 | 5 | 6 | 5 | 6 | 4 | 6 | 5 | 5 | 4 | 4 |
Note: Maximum Design Temperature shall depend on the corresponding pressure requirement.