HPM® C 276 is a Nickel-Molybdenum-Chromium-Tungsten alloy with a high level of corrosion resistance. A low carbon content enables the alloy to resist intergranular corrosion at weld joints. These attributes make it an important alloy for the most severe chemical processing applications. such as use in metal diaphragms for aerospace sensors and burst discs.
The alloy is readily formed from the annealed temper.All standard welding methods except oxy-acetylene can be used for joining.
Available Sizes:
HPM® C 276 is available from Hamilton Precision Metals as strip product in thicknesses From 0.0005” to 0.050” (0.0127 mm to 1.27 mm) and widths up to 12.0” (304.8 mm).
The material conforms to ASTM B575 and UNS N10276.
Nominal Composition
| HPM® C 276 NOMINAL COMPOSITION |
| Molybdenum |
16.0%
|
| Chromium |
15.6%
|
| Iron |
5.7%
|
| Tungsten |
3.6%
|
| Carbon |
0.004%
|
| Nickel |
Balance
|
Mechanical Properties
| HPM® C 276 MECHANICAL PROPERTIES |
|
ANNEALED |
COLD ROLLED |
| Ultimate Tensile Strength |
130,000 PSI |
240,000 PSI |
| Yield Strength (0.2% Offset) |
70,000 PSI |
220,000 PSI |
| Elongation in 2” * |
40%
|
2%
|
| Modulus of Elasticity (Tension) |
29.8 X 106
PSI
|
- |
| Poisson’s Ratio |
0.304 |
- |
The measured elongation will be less as thickness decreases to 0.002” and less.
These values may be adjusted by control of process variables – consult HPM for desired values.
Physical Properties
| HPM® C 276 PHYSICAL PROPERTIES |
| Density |
0.321 lbs./cu.in. |
| Melting Point (Approx.) |
1325°C |
| Electrical Resistivity @ R.T. |
130 Microhm·cm |
|
Thermal Expansion Coefficient (25° to 100°C)
|
11.2 x 10-6/ °C
|
| Thermal Conductivity @ R.T |
10.2 W/m·K
|
| Magnetic Attraction |
None |
Typical values to guide alloy selection but are not a guarantee of minimum or maximum.