Hastelloy C276


Alloy C276 nickel alloy plate in thicknesses from 3/16″ (4.8mm) through 2 ½” (63.5mm) and is one of the most universally corrosion-resistant materials available for applications such as chemical and petrochemical processing, flue gas desulfurization, pulp and paper equipment, industrial waste, and air pollution control.

Available thicknesses for Alloy C276:

3/16″

1/4″

3/8″

1/2″

5/8″

3/4″

4.8mm

6.3mm

9.5mm

12.7mm

15.9mm

19mm

1″

1 1/4″

1 1/2″

1 3/4″

2″

2 1/2″

25.4mm

31.8mm

38.1mm

44.5mm

50.8mm

63.5mm

Alloy C276 nickel alloy plate (UNS N10276) is a nickel-molybdenum-chromium-iron-tungsten alloy which is among the most corrosion-resistant alloys currently available. The high molybdenum content imparts resistance to localized corrosion such as pitting. The low carbon minimizes carbide precipitation during welding to maintain resistance to intergranular attack in heat affected zones of welding joints.

Alloy C276 nickel alloy plate also has good high temperature strength and moderate oxidation resistance although the alloy will eventually form embrittling high temperature precipitates.

General Properties

Alloy C276 nickel alloy plate (UNS N10276) is an austenitic nickel-molybdenum-chromium alloy with a small addition of tungsten. It is one of the premier corrosion resistant materials available for process industries. Alloy C276 nickel alloy plate has excellent corrosion resistance in both oxidizing and reducing environments.

The combination of the high molybdenum and chromium content, along with the addition of tungsten, make Alloy C276 nickel alloy plate highly resistant to chloride stress corrosion cracking, pitting, crevice corrosion and general corrosion.

Alloy C276 nickel alloy plate can operate in oxidizing atmospheres up to 1900oF (1038oC), however, the alloy lacks sufficient chromium content to operate successfully in the most strongly oxidizing environments like hot, concentrated nitric acid.

The low carbon content of Alloy C276 nickel alloy plate enables the alloy to be utilized in the as-welded condition. It cannot be hardened by heat treatment, but can be hardened by cold working. The alloy has a higher work-hardening rate than the austenitic stainless steels which should be taken into consideration.

Alloy C276 nickel alloy plate can be easily welded and processed utilizing standard shop fabrication practices for austenitic stainless steels and nickel based alloys.

Chemical Analysis

Weight % (all values are maximum unless a range is otherwise indicated)

 

 

 

 

Nickel

Balance

Manganese

1.0

Molybdenum

15.0 min.-17.0 max.

Carbon

0.01

Chromium

14.5 min.-16.5 max.

Vanadium

0.35

Iron

4.0 min.-7.0 max.

Phosphorous

0.04

Tungsten

3.0 min.-4.5 max.

Sulfur

0.03

Cobalt

2.5

Silicon

0.08

Physical Properties

Density

0.321 lbs/in3
8.89 g/cm3

Specific Heat

0.102 BTU/lb-°F (70°F)
427 J/kg-°K (20°C)

Modulus of Elasticity

29.8 x 106 psi
205.0 GPa

Thermal Conductivity 212°F (100°C)

67 BTU/hr/ft2/ft/°F

9.8 W/m-°K

Melting Range

2415 – 2500°F
1325 – 1370°C

Electrical Resistivity

51 Microhm-in at 75°C

1.30 Microhm-cm at 24°C