Alloy C276 Tube

Alloy C276 tube (Hastelloy alloy C-276 UNS N10276/W.Nr. 2.4819) can be considered an upgrade to Alloy C (N30002) with significantly lower carbon and silicon contents. Alloy C had to be replaced due to its significant limitations. Alloy C can be susceptible to intergranular corrosion when used in welded conditions in oxidizing and chloride-containing environments. Alloy C-276 was manufactured to address these issues.

Hastelloy C276 Tube Material Standard: 

 

• ASTM B622: Standard Specification for Seamless Nickel and Nickel-Cobalt Alloy Pipe and Tube

 

• ASTM B619: Standard Specification for Welded Nickel and Nickel-Cobalt Alloy Pipe

 

• Suppliers: We stock and produce Hastelloy c276 plate, Hastelloy c276 flanges, Hastelloy c276 tube, Hastelloy c276 sheet, Hastelloy c276 fittings, Hastelloy c276 round bar.

 

ASTM B622 UNS N10276 Tubing Specifications

Alloy C276 Tubing Mechanical Properties

Hastelloy C276 Corrosion Resistance

Alloy C276 tube is a nickel-molybdenum-chromium superalloy with the addition of tungsten designed to have excellent corrosion resistance in a variety of severe environments. The high nickel and molybdenum contents make UNS N10276 particularly resistant to pitting and crevice corrosion in reducing environments, while the chromium provides resistance to oxidizing media. The low carbon content minimizes the precipitation of carbides during welding to maintain the corrosion resistance of the welded structure.

Alloy C276 Tubing Average Corrosion Rates:

• Hydrochloric acid HCl. 2%. boiling: 1.09 mm/rok
• Hydrochloric acid HCl. 3%. 66°C: <0.03 mm/rok
• Hydrochloric acid HCl. 10%. 66°C: 0.51 mm/rok
• Hydrochloric acid HCl. 15%. 66°C: 0.7 mm/rok
• Hydrochloric acid HCl. 5%. 66°C: 0.13-0.51 mm/rok
• Hydrochloric acid HCl. 15%. 93°C: 1.7 mm/rok
• Hydrochloric acid HCl. 15%. 121°C: 6.4 mm/rok
• Sulphuric acid H2SO4. 10%. boiling: 0.51 mm/rok
• Sulphuric acid H2SO4. 80%. 80°C: 0.58 mm/rok
• 10% H2SO4 + 2% HCl. wrzące: 3.51 mm/rok
• Nitric acid HNO3. 10%. wrzący: 0.41 mm/rok
• Phosphoric acid H3PO4. 30%. boiling: <0.13 mm/rok
• Phosphoric acid H3PO4. 85%. boiling: 0.13-0.64 mm/rok
• Formic acid. 88%. boiling: 0.03 mm/rok
• Ferric chloride. 10%. boiling: 0.05 mm/rok
• Acetic acid. 99%. boiling: 0.0076 mm/rok

UNS N10276 Room Temperature Physical Properties:

• Density: 8.9 g/cm3
• Linear expansion coefficient: 11.2 *10-6m/(m*K)
• Thermal conductivity: 9.8 W/(m*K)
• Specific heat capacity: 427 J/(kg*K)
• Young's modulus: 205 GPa
• Electrical resistivity: 1.3 μΩ*m
• Shear modulus: 79 GPa
• Superconductor at -73°C (-100°F)
• Melting temperature: 2415-2500 °C

ASTM B622 UNS N10276 Tubes Applications

• Chemical processing
• Oil and gas
• Petrochemicals
• Desalination plants
• Waste treatment

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