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Hastelloy C-276

Hastelloy C-276

INCONEL alloy C-276 (UNS N10276/W.Nr. 2.4819) is known for its corrosion resistance in a wide range of aggressive media. The high molybdenum content imparts resistance to localized corrosion such as pitting. The low carbon minimizes carbide precipitation during welding to maintain resistance to intergranular attack in heat-affected zones of welded joints. It is used in chemical processing, pollution control, pulp and paper production, industrial and municipal waste treatment and the recovery of “sour” natural gas. Applications in air pollution control include stack liners, ducts, dampers, scrubbers, stack-gas re-heaters, fans and fan housings. In chemical processing, the alloy is used for components including heat exchangers, reaction vessels, evaporators and transfer piping.

Physical Properties

Density, lb/in……………………………..0.321
Density, g/cm……………………………..8.89
Melting Range, °F ……………………….2415-2500
Melting Range, °C………………………..1325-1370
Thermal Conductivity, Btu•in/ft2•h•°F………67.9
Thermal Conductivity, W/m•°C……..9.8
Specific Heat, Btu•lb•°F ………………..0.102
Specific Heat, J/kg•°C……………………427
Young’s Modulus, 103 ksi ………………29.8
Young’s Modulus, GPa …………………..205
Shear Modulus, 103 ksi …………………..11.4
Shear Modulus, GPa………………………..79
Permeability at 200 oersted (15.9 kA/m)…………1.0002
Poisson’s Ratio………………………………………………0.307

Chemical Composition

Nickel…………………………..Balance
Molybdenum ……………….15.0-17.0
Chromium……………………14.5-16.5
Iron …………………………….4.0-7.0
Tungsten………………………3.0-4.5
Cobalt ………………………….2.5 max.
Manganese …………………..1.0 max.
Carbon…………………………0.01 max.
Vanadium…………………….0.35 max.
Phosphorus ………………….0.04 max.
Sulfur ………………………….0.03 max.
Silicon …………………………0.08 max

Designation & Standards

Rod, Bar, Wire and Forging Stock: ASTM B 462 (Rod, Bar and Forging Stock), ASTM B 564 & ASME SB 564 (Forgings),ASTM B 574 & ASME SB 574 (Rod, Bar and Wire), ISO 9723 (Rod and Bar), ISO 9724 (Wire), ISO 9725 (Forgings), DIN 17752, DIN 17753, DIN 17754, VdTÜV 400/12.98

Plate, Sheet and Strip: ASTM B 575/B 906 & ASME SB 575/SB 906, ISO 6208, DIN 17750, VdTÜV 400/12.98 )

Pipe and Tube: ASTM B 622/B 829 & ASME SB 622/SB 829 (Seamless Tube), ASTM B 626/B 751 & ASME SB 626/SB 751 (Welded Tube), ASTM B 619/B 775 & ASME SB 619/SB 775 (Welded Pipe), ISO 6207 (Seamless Tube), DIN 17751, VdTÜV 400/12.98

Welding Products– INCONEL Filler Metal C-276 – AWS A5.14 / ERNiCrMo-4, INCONEL Welding Electrode C-276 – AWS A5.11 / ENiCrMo-4

Other Products –ASTM B 366 & ASME SB 366 (Fittings), DIN 17744 (chemical composition)

Applications

Alloy C-276 has a broad field of application in the chemicals and petrochemicals industry, for components in
organic processes containing chlorides, and for catalytic systems. The material can be used especially in cases where
hot, contaminated mineral acids, solutions or organic acids (such as formic acid and acetic acid) and sea water occur.
Examples of fields of application:

  •  Paper and pulp industry, e.g. for digestion and bleaching tanks.
  •  Washers, agitators and wet ventilators in flue gas desulfurization systems.
  •  Equipment and components for acid gas applications.
  •  Reactors for acetic acid production.
  •  Sulfuric acid coolers.
  •  Methylene diphenyl isocyanate (MDI) Manufacturing and processing of contaminated phosphoric acid