Alloy C-276 – Properties, applications and technical data
Alloy C-276 is a nickel-chromium-molybdenum alloy with tungsten addition, developed for extreme corrosion resistance in aggressive environments.
The material is known for its ability to resist both oxidizing and reducing media as well as localized corrosion such as pitting and crevice corrosion.
The alloy is used where chemical resistance, weldability and long-term operational reliability are crucial – especially in the chemical process industry, environmental technology and energy systems.
Properties of Alloy C-276
Alloy C-276 (UNS N10276 / Werkstoffnr 2.4819) has a high molybdenum content that provides very good resistance to localized corrosion.
The low carbon content minimizes carbide precipitation during welding and preserves resistance to intercrystalline corrosion in heat-affected zones.
The material exhibits excellent resistance to acids, chlorides, chlorine gas, wet chlorine and other aggressive chemicals.
Type: Nickel-chromium-molybdenum-tungsten alloy
Alloy: Ni-Cr-Mo-W (Alloy C-276)
Structure: Austenitic nickel-based alloy
Designations: Hastelloy C-276, Alloy C-276, UNS N10276, Werkstoffnr 2.4819, ASTM B575, ASTM B622, ASTM B619
Advantages
- Exceptional corrosion resistance in aggressive chemical environments
- Very good resistance to pitting and crevice corrosion
- Resistance to both oxidizing and reducing media
- Low carbon content minimizes intercrystalline corrosion after welding
- Good weldability without risk of cracking
Limitations
- Higher material cost than standard stainless steels
- Heavier than alternative materials such as titanium
- Can be more demanding to machine
Typical applications
Chemical process industry
Heat exchangers, reaction vessels, evaporators and transfer pipes in aggressive environments.
Environmental and pollution control
Chimney linings, ducts, dampers, scrubbers, reheaters, fans and fan housings for flue gas cleaning.
Pulp and paper industry
Equipment in processes with high chemical stresses.
Waste management and energy
Industrial and municipal waste management and sour natural gas recovery.
Corrosion resistance
Alloy C-276 is specifically developed to withstand a wide range of aggressive media, including chlorides, acids, wet chlorine gas and reducing chemicals.
The alloy offers excellent resistance to localized corrosion and intergranular corrosion in welded structures.
Environments where Alloy C-276 performs well
- Chloride-rich environments
- Oxidizing and reducing acids
- Flue gas purification and pollution control
- Process equipment in the chemical industry
Environments to avoid
- Applications where simpler materials provide sufficient performance
- Extremely high temperatures above the material's design limit
Technical data (annealed condition)
| Yield strength (0.2%) |
~283 MPa |
| Tensile strength |
~690 MPa |
| Elongation at fracture |
~40% |
| Density |
~8.89 g/cm³ |
| Modulus of elasticity |
~205 GPa |
| Recommended maximum temperature |
≤1040°C |
| Weldability |
Very good – recommended filler material ERNiCrMo-4 |
With a global network of reliable suppliers, we offer customized solutions and fast access to the right nickel-based alloy for your needs.
Contact us if you need technical advice or a quote - we will help you find the right material for your application.
Buy Alloy C-276 from HARALD PIHL - your specialist in corrosion-resistant nickel materials with global delivery.
Our strengths
- Certified according to ISO 9001 and AS9120
- Materials for aerospace, defense and medical technology
- Complies with AD 2000, PED as well as ASTM and ASME
- Full traceability according to EN 10204 3.1
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