HASTELLOY® C-276 – W. Nr. 2.4819 / UNS N10276 / ASTM B575, B574, B622
HASTELLOY® C-276
HASTELLOY® C-276 is a nickel-chromium-molybdenum alloy designed to provide excellent corrosion resistance in a wide range of aggressive chemical environments. Characterized by extremely low carbon and silicon content, this alloy is widely used for critical applications in the chemical, petrochemical, and power generation industries.
The alloy exhibits exceptional resistance to stress corrosion cracking, pitting, and crevice corrosion, especially in chloride-bearing environments. Thanks to its high mechanical strength and ability to withstand elevated temperatures, it is ideal for applications requiring durability and reliability.
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Reference standards:
- ASTM B575 (plates and strips)
- ASTM B574 (bars and wires)
- ASTM B622 (seamless pipes)
- ASME SB-366, SB-462, SB-564
Chemical composition (%)
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 57.0 min |
| Chromium (Cr) | 16.0 |
| Molybdenum (Mo) | 16.0 |
| Iron (Fe) | 5.0 |
| Tungsten (W) | 4.0 |
| Cobalt (Co) | 2.5 max |
| Manganese (Mn) | 1.0 max |
| Vanadium (V) | 0.35 max |
| Silicon (Si) | 0.08 max |
| Carbon (C) | 0.01 max |
| Copper (Cu) | 0.5 max |
Mechanical properties
| Temperature (°C) | Tensile strength (MPa) | Yield strength (MPa) | Elongation (%) |
|---|---|---|---|
| 20 | 792 | 356 | 61 |
| 400 | 694 | 290 | 59 |
| 600 | 681 | 248 | 68 |
| 800 | 650 | 225 | 67 |
Heat treatments
- Annealing: 1121°C (2050°F) for 10-30 minutes, followed by water quenching. For structures under 10 mm, rapid air cooling is possible.
- Hot forming: Starting temperature at 1232°C (2250°F) and finishing at 954°C (1750°F).
- Cold forming: Requires higher energy compared to austenitic stainless steels.
Available forms
HASTELLOY® C-276 is available in the following forms:
Industrial applications
Due to its superior resistance to corrosion and high temperatures, HASTELLOY® C-276 is used in various industrial sectors:
- Aerospace and Defense: Components for engines and exhaust systems exposed to extreme environments.
- Power Generation: Heat exchangers and reactors.
- Chemical and Pharmaceutical Industry: Storage tanks, plants for processing aggressive acids, and chemical reactor components.
- Motorsport: High-temperature resistant exhaust systems.
- Nuclear: Corrosion and high-temperature resistant components in radioactive environments.
- Oil & Gas: Subsea pipelines and valves for corrosive and high-pressure environments.
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