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Alloy C276 Technical Overview
Hastelloy C276 (UNS N10276) is a nickel-molybdenum-chromium-tungsten alloy with outstanding corrosion resistance in a wide range of severe environments. The high molybdenum content makes the alloy especially resistant to pitting and crevice corrosion. The low carbon content minimizes carbide precipitation during welding to maintain corrosion resistance in as-welded structures. Alloy C276 is used in chemical processing, pollution control, pulp and paper production, industrial and municipal waste treatment, and recovery of sour natural gas. Steel Emporium provides Grade C276 pipes and tubes with complete certification for high-risk chemical environments.
Key Material Advantages
Broad Chemical Stability
Excellent resistance in both reducing and oxidizing environments.
Pitting & SCC Resistance
Exceptional resistance to localized corrosion and stress corrosion cracking.
Superior Weldability
Very low carbon content prevents intergranular attack in the weld zone.
| Grade | Ni | Mo | Cr | Fe | W | Co | C | Mn | Si |
|---|---|---|---|---|---|---|---|---|---|
| Hastelloy C276 | Balance | 15.0 - 17.0 | 14.5 - 16.5 | 4.0 - 7.0 | 3.0 - 4.5 | 2.5 max | 0.01 max | 1.0 max | 0.08 max |
| Property | Metric Value | Imperial Value |
|---|---|---|
| Tensile Strength (min) | 790 MPa | 115,000 psi |
| Yield Strength (0.2% offset) | 355 MPa | 52,000 psi |
| Elongation (% in 50mm) | 40% | 40% |
| Hardness (Rockwell B) | 90 HRB | - |
| Property | Value |
|---|---|
| Density | 8.89 g/cm³ (0.321 lb/in³) |
| Melting Range | 1323 - 1371 °C (2415 - 2500 °F) |
| Specific Heat | 427 J/kg·°C (0.102 Btu/lb·°F) |
| Thermal Conductivity | 10.2 W/m·°C |
| Standard | UNS Number | Werkstoff No. | AFNOR | Common Name |
|---|---|---|---|---|
| Alloy C276 | N10276 | 2.4819 | NiMo16Cr15W | Hastelloy C276 |
| Nominal Size (NB) | OD (mm) | SCH 10 | SCH 40 | SCH 80 |
|---|---|---|---|---|
| 1/2" | 21.34 | 1.41 | 1.80 | 2.35 |
| 1" | 33.40 | 2.32 | 3.60 | 4.72 |
| 2" | 60.33 | 4.37 | 6.05 | 8.32 |
| 3" | 88.90 | 7.48 | 12.63 | 17.02 |
| 4" | 114.30 | 12.27 | 17.89 | 24.84 |
Industrial Applications
Chemical Process
Reactors handling wet chlorine and acetic acid.
Pollution Control
FGD scrubbers and chimney stack liners.
Pulp & Paper
Bleaching equipment and process tanks.
Waste Treatment
Piping for industrial waste and incineration.
Oil & Gas
Sour gas production and downhole tubing.
Nuclear Industry
Nuclear fuel reprocessing components.