NeoNickel

Alloy C276

The most universally corrosion resistant material available today, look no further than C276

Characteristics of Alloy C276

A solution-annealed nickel-molybdenum-chromium alloy with the addition of tungsten, C276 exhibits excellent corrosion resistance in a wide range of severe environments.

  • UNS Number: N10276
  • Werkstoff Number: 2.4819
  • ASTM: B564, B574, B575, B619, B622, B626, B366, B462, B775

Product availability

Coil
Flanges
Pipe (Seamless)
Pipe (Welded)
Pipe Fittings
Plate
Round Bar
Round Tube
Sheet
Welding Electrode
Welding Wire

Chemical analysis

%NiCrMoWCoCMnSiPSFeV
MinBalance14.515300000040
MaxBalance16.5174.52.50.0110.080.040.0370.35

Key Properties

  • Density: 8.89 g/cm³
  • Melting Range: 1325 - 1370°C
  • Hardness: 87 HRB
  • Specific Heat Capacity: 427 J/kg.°C
  • Electrical Resistivity: 1.229 µΩ.m
  • Poisson's Ratio: 0.307

About Alloy C276

Alloy C276, with a high nickel contents, is immune to chloride-induced stress corrosion cracking. The high molybdenum and chromium contents allow the alloy to perform in oxidising, non-oxidising and mixed acids media, whilst exhibiting outstanding resistance to pitting and crevice corrosion attack. The addition of tungsten inhibits the development of pits. Finally, C276 is suitable for off-shore applications where hydrogen-sulphide(H2S) stress corrosion cracking resistance is essential.

In aggressive or corrosive environments when other alloys have failed, many companies have then turned to C276 alloy – one of the most corrosion resistant alloys on the market.

Industries where C276 is utilised are petrochemical and chemical processing, power generation, pharmaceutical, pulp and paper production and waste treatment to name a few.

Mechanical & Physical Properties

Mechanical & Physical Properties21⁰C100⁰C200⁰C300⁰C400⁰C
Ultimate Tensile Strength for sheet ≤ 5 mm thick750-1000
Ultimate Tensile Strength for sheet 5 to ≤ 20 mm thick700-950
Ultimate Tensile Strength for bar ≤ 90 mm thick700-950
0.2% Yield Strength for sheet ≤ 50 mm thick280240220195
0.2% Yield Strength for sheet 5 to ≤ 20 mm thick255255200170
0.2% Yield Strength for bar ≤ 90 mm thick255225200170
Elongation, % for sheet ≤ 5 mm thick30
Elongation, % for sheet 5 to ≤ 20 mm thick25
Elongation, % for bar ≤ 90 mm thick35
Charpy Impact V-notch mean value / J 96 (56 when welded)
Charpy Impact V-notch indicidual value / J 67 (39 when welded)

Aqueos Corrosion Data

MediaCommon NameTemp °F (°C)Corrosion Rate (mpy)
80% C2H4O2Acetic AcidBoiling0.15
10% NH3BrAmmonium Bromide176 (80)Nil
10% NH3BrAmmonium BromideBoilingNil
10% FeCl3Ferric ChlorideBoiling2
88% CH2O2Formic AcidBoiling1
0.2% HClHydrochloric AcidBoiling0.60
1% HClHydrochloric AcidBoiling13.3
2% HClHydrochloric AcidBoiling43
5% HClHydrochloric Acid140 (60)10
20% HClHydrochloric Acid212 (100)154
3% HFHydrofluoric Acid176 (80)53
10% HFHydrofluoric Acid75 (24)2
10% HFHydrofluoric Acid176 (80)28
Concentrated HFHydrogen fluoride75 (24)24
Concentrated HFHydrogen fluoride176 (80)80
10% HBrHydrogen Bromide176 (80)<1
10% HBrHydrogen BromideBoiling<1
10% HNO3Nitric AcidBoiling15
65% HNO3Nitric AcidBoiling888
20% H3PO4Phosphoric AcidBoiling<1
60% H3PO4Phosphoric AcidBoiling1
85% H3PO4Phosphoric Acid212 (100)5
85% H3PO4Phosphoric AcidBoiling121
50% NaOHSodium HydroxideBoiling1
10% H2SO4Sulphuric AcidBoiling20
20% H2SO4Sulphuric Acid176 (80)3
40% H2SO4Sulphuric Acid176 (80)5
80% H2SO4Sulfphuric Acid176 (80)4

Applications of Alloy C276

  • Pressure Vessels
  • Reactors
  • Mixers and Agitators
  • Scrubbers
  • Dampers
  • Heat Exchangers
  • Venturis
  • Evaporators
  • Solvent Recovery Plants
  • Pumps and Valves
Proud members of the British Valve & Actuator AssociationProud members of the British Valve & Actuator Association