Hastelloy C-276 is a nickel-molybdenum-chromium superalloy with the expansion properties of tungsten, designed for excellent corrosion resistance in a variety of severe conditions. High nickel alloying and molybdenum species make the nickel steel alloy particularly resistant to pitting and crevice corrosion in reducing conditions, while chromium provides resistance to oxidizing media. The low carbon content minimizes carbide precipitation during welding to maintain the corrosion resistance of the welded structure. These nickel alloys resist the formation of grain limit acceleration in the heat affected zone of the weld, making them suitable for most chemical process applications in the as-welded condition.
Hastelloy C-276 chemical composition
|
C |
P |
Si |
S |
V |
Cr |
Mn |
Fe |
Co |
Ni |
Mo |
W |
|
0.01 max |
0.08 max |
0.04 max |
0.03 max |
0.35 max |
14.5 - 16.5 |
1.0 max |
4.0 - 7.0 |
2.5 max |
Remainder |
15.0 - 17.0 |
3.0 - 4.5 |
Hastelloy Alloy C-276 mechanical properties
|
Tensile Strength (ksi) |
0.2% Yield Strength (ksi) |
Elongation% in 2 inches |
|
100 |
41 |
40 |
alloy C-276 physical properties
|
|
Units |
Temperature in°C |
|
Density |
8.69 g/cm³ |
22° |
|
Specific Heat |
0.102 Kcal/kg.C |
Room |
|
Melting Range |
1323-1371°C |
- |
|
Modulus of Elasticity |
205 KN/mm² |
Room |
|
Electrical Resistivity |
129.5 µΩ.cm |
24° |
|
Coefficient of Expansion |
11.2 µm/m°C |
24-93° |
|
Thermal Conductivity |
10.2 W/m-°K |
38° |
C-276 alloy is mostly used as part of the most severe situations, for example, chemical processing, pollution control, pulp and paper production; industrial and municipal waste treatment and sour gas recovery.
