Hastelloy C-276 (UNS N10276) Seamless Pipes & Tubes
Alloy C-276 (Hastelloy C-276, UNS N10276) is considered the most versatile corrosion-resistant alloy available. With 16% molybdenum, 16% chromium, and 4% tungsten in a nickel base, it resists the formation of grain-boundary precipitates in the weld heat-affected zone, making it suitable for most chemical process applications in the as-welded condition.
Size Range
1/4" NPS to 10" NPS (6.35mm to 273.1mm OD)
Wall Thickness
SCH 5S to SCH 80S
Standards
4 specs
Chemical Composition (% by weight)
| Ni | Mo | Cr | W | Fe | Co | C | Mn | Si | V |
|---|---|---|---|---|---|---|---|---|---|
| Remainder | 15.0-17.0 | 14.5-16.5 | 3.0-4.5 | 4.0-7.0 | 2.5 max | 0.01 max | 1.00 max | 0.08 max | 0.35 max |
Mechanical Properties (Minimum at Room Temperature)
| Tensile Strength | Yield Strength | Elongation | Hardness |
|---|---|---|---|
| 690 MPa min | 283 MPa min | 40% min | N/A |
Physical Properties - Alloy C-276
| Density | Melting Range | Thermal Conductivity | Electrical Resistivity | Specific Heat | Coeff. of Thermal Expansion |
|---|---|---|---|---|---|
| 8.89 g/cm3 | 1325-1370 C | 10.2 W/m-K | 1300 nOhm-m | 427 J/kg-K | 11.2 um/m-C |
Corrosion Resistance - Alloy C-276
| Property | Value |
|---|---|
| Pitting Resistance (PREN) | >70 (highest available) |
| Max Service Temp (Oxidizing) | 1093 C |
| Intergranular Corrosion | Outstanding (low C) |
| Stress Corrosion Cracking | Virtually immune |
| General Corrosion Rate | Nil in most acids |
| Seawater Resistance | Outstanding |
Equivalent International Grades
| ASTM | Trade | DIN |
|---|---|---|
| N10276 | Hastelloy C-276 | 2.4819 |
Alloy C-276 vs Comparable Grades
| Grade | UNS | Tensile | Yield | PREN | Max Temp |
|---|---|---|---|---|---|
| Alloy 625Nickel-Chromium-Molybdenum Alloy | N06625 | 827 MPa min | 414 MPa min | >50 (exceptional) | 980 C |
| Alloy 825Nickel-Iron-Chromium-Molybdenum Alloy | N08825 | 586 MPa min | 241 MPa min | ~31 | 540 C |
| Monel 400Nickel-Copper Alloy | N04400 | 517 MPa min | 172 MPa min | N/A (Ni-Cu alloy) | 480 C |
Applicable Standards
Applications
Key Advantages of Alloy C-276
Alloy C-276 Applications by Region
Middle East (UAE, Saudi Arabia, Qatar, Oman, Kuwait)
Ultimate corrosion-resistant alloy for the most aggressive sour gas, acid, and chemical applications in UAE, Saudi Arabia, and Qatar.
Europe (Germany, UK, Norway, Netherlands, Italy)
Premium alloy for pharmaceutical, chemical, nuclear, and FGD applications in Germany, UK, France, and Scandinavia.
United States
Industry standard for the most severe corrosion applications in chemical, pharmaceutical, and nuclear industries.
Frequently Asked Questions about Alloy C-276 Seamless Pipes
Quick Specifications
1/4" NPS to 10" NPS (6.35mm to 273.1mm OD)
SCH 5S to SCH 80S
Industries Served
Related Grades
Compare With
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