Hastelloy C276

 

Principal Design Features

C-276 is a wrought corrosion-resistant alloy. A prime advantage of this alloy is that it generally does not require solution heat treatment after welding. It resists the formation of grain boundary precipitates that would degrade corrosion resistance.

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Applications

Chemical process equipment and desulfurization of flue gas equipment.

Machinability

Good machinability, although the alloy work hardens as is true of the nickel base alloys in general.

Forming

Can be cold worked by all conventional methods.

Welding

Weldable by all common methods except that excessive heat input should be avoided. Can be used in the "as-welded" condition without further heat treatment for most corrosive applications.

Heat Treatment

Solution heat treatment is done at 2050 F followed by a rapid quench. The alloy is supplied in this condition. If hot forming or forging is done then the parts should be solution heat treated, if possible, before use.

Forging

The alloy can be forged or hot-upset by conventional means.

Hot Working

Can be hot formed or extruded. Should be solution heat treated following hot forming.

Cold Working

Readily cold worked by conventional methods.

Annealing

Normally supplied and use in the solution treated condition, a 2050 F soak followed by rapid quench.

Aging

Not normally done. The alloy is used in solution treated condition.

Tempering

Not applicable to this alloy.

Hardening

Hardened by cold working only.

Other Mechanical Properties

"U" notch impact strength at -320 F of 263 ft. lbs. in solution treated condition.

Density: 0.321

Specific Gravity: 8.89

Specific Heat: 0.102

Electrical Resistivity: 779

Melting Point: 2500

Thermal Conductivity: 78

MCTE: 6.2

MoETensile: 29.8

 

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