Hastelloy C276

Hastelloy C276 is a wrought nickel-chromium-molybdenum-tungsten alloy which displays a remarkable corrosion resistance in a very wide range of processing environments. It displays excellent resistance to pitting and crevice corrosion, stress corrosion cracking and oxidising atmospheres up to 1040°C.

The high molybdenum content of Hastelloy C276 provides the alloy with its excellent resistance to pitting and crevice corrosion. Since the alloy’s low carbon content means Hastelloy C276 is resistant to the formation of grain boundary precipitates in the heat-affected zone, Hastelloy C276 can maintain its unique corrosion resistance in the as-welded condition.

Hastelloy C276 is selected for resistance to wet chlorine gas, hypo-chlorites and many other aggressive chemicals. It also offers exceptional resistance to strong solutions of oxidising salts such as ferric and cupric chlorides.

Related Specifications of Hastelloy C276

  • N10276
  • ASTM B574
  • 2.4819
  • NC 17d (FR)
  • NiMo16Cr15W (DE)

Nominal Composition of Hastelloy C276

Ni 57.0%, Cr 14.5%~16.5, Fe 4%~7%, Mo 15.0%~17%, W 3%~4.5%

Mechanical Properties of Hastelloy C276

Ultimate Tensile Strength (N/mm²) Proof Stress (N/mm²) Elongation (%) Hardness (HB)
690 283 40

Characteristic as below
1. Excellent corrosion resistance to most of corrosion media in oxidation and reduction environments
2. Excellent resist pitting, crevice corrosion and stress corrosion cracking performance.

Alloy C-276 Metallurgical structure
C276 is face-centered cubic lattice structure

Alloy C-276 Corrosion resistance
C276 alloy suit for many kinds of chemical process industry which contain the axidizing medium and reductant. High
molybdenum and chromium content make it can resist the chloride corrosion, and tungsten make it corrosion
resistance better C276 is one of a few material that can resist the corrosion of most chlorine, hypochlorite and chlorine
dioxide,this alloy have prominent corrosion resistance to high concentration chlorate( iron chloride and copper

Alloy C- 276 Application field
C276 is widely used in the chemical field and petrifaction field, such as the element of chloride organic and catalyze
system. This material especially suit for high temperature environment, impure inorganic acid and organic acid (such as
formic acid and acetic acid), sea-water corrosion environment.
Other application field like:
1. The digester and bleacher in the use of paper pulp and paper making industry
2.Absorption tower, re-heater and fan in the FGD system
3. The equipment and parts in the use of acidic gas environments
4. Acetic acid and anhydride reaction generator
5. Sulfur acid cooling
6. MDI
7. Manufacture and processing of impure phosphoric acid

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