Alloy C-276 Bars (UNS N10276)

Maass Special Alloys supplies Alloy C-276 bars as rolled and forged bar upon request. Also known as Hastelloy C-276, UNS N10276 or EN 2.4819, this nickel-molybdenum-chromium alloy with tungsten is used for severe corrosive service. The supply range runs from small diameters up to 600 mm.

High-quality Alloy C-276 bars

Nickel alloy bar supply for severe corrosion requirements.

Severe corrosion

Built for aggressive process media.

C-alloy grade

Ni-Mo-Cr-W alloy chemistry.

Localized corrosion

Resists pitting and crevice corrosion.

Rolled & forged

Available as rolled or forged bar.

Certified supply

EN 10204 3.1 or 3.2.

Alloy C-276 bar specifications and certification

Responsive Specification Table
Property Value
Material Alloy C-276 / Hastelloy C-276
UNS N10276
EN / WNR 2.4819
Product forms Rolled bar and forged bar
Delivery time Approx. 1 - 2 weeks

For Alloy C-276 bar, Maass Special Alloys can arrange supply in rolled or forged form based on the required size and documentation. The range covers small diameters through to 600 mm. Forged bar is generally used for larger sizes, while rolled bar may be suitable for smaller and mid-range diameters.

Certified supply & additional information

  • EN 10204 / 3.1 certified
  • ASTM / ASME specifications available where applicable
  • Material supplied in compliance with applicable international specifications
  • Random lengths or cut-to-length supply
  • Heat number traceability

Upon request

  • Additional testing
  • EN 10204 / 3.2 certification
  • Third-party inspection

Chemical composition

Alloy C-276 / UNS N10276 is a nickel-molybdenum-chromium alloy with tungsten. The high molybdenum content supports resistance in reducing environments, while chromium contributes to performance in oxidizing media. Tungsten further strengthens resistance in severe chemical service.

Below chemical composition limits are provided for quick reference. Final compliance is confirmed by the Mill Test Certificate and the applicable order specification.

Responsive Chemical Composition Table
Element Limit (%)
Nickel (Ni) Balance
Molybdenum (Mo) 15.0 – 17.0
Chromium (Cr) 14.5 – 16.5
Iron (Fe) 4.0 – 7.0
Tungsten (W) 3.0 – 4.5
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.
Phosphorus (P) 0.04 max.
Sulfur (S) 0.03 max.

Typical physical and mechanical properties of Alloy C-276

The values below provide a general indication of typical Alloy C-276 bar properties. Actual values may vary depending on diameter, product form, heat treatment, supply condition and final order specification.
Responsive Properties Table
Property Unit Typical value
Density lb/in³ 0.321
Density g/cm³ approx. 8.89
Melting range °F 2410 – 2460
Melting range °C approx. 1320 – 1350
Modulus of elasticity 10³ ksi 29.8
Shear modulus 10³ ksi 11.2
Poisson’s ratio - 0.307
Thermal conductivity at 70°F Btu-in/h-ft²-°F 71
Specific heat at 70°F Btu/lb-°F 0.102
Electrical resistivity at 70°F μohm-m 1.22
Tensile strength ksi 100 min.
Yield strength ksi 41 min.
Elongation % 40

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sales@maass-special-alloys.com

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