Incoloy 20, known as Carpenter 20 and UNS N08020, is a nickel-iron-chromium alloy with additions of copper and molybdenum. It also contains niobium for stabilization against sensitization and resultant intergranular corrosion. The alloy has excellent resistance to general corrosion, pitting, and crevice corrosion in chemicals containing chlorides and sulfuric, phosphoric, and nitric acids.
Applications of Incoloy 20:
Incoloy 20, is used in a variety of industries, including chemical processing, petrochemical and refining, marine, pharmaceutical, and food processing.
It is commonly used in the production of gasoline, organic & inorganic chemicals, pharmaceutical processing, and food industry.
It is also used in heat exchangers, pressure vessels, condensers, and valves.
Normal product forms: Pipes, tubes, sheets, strips, plates, bars, forgings, and wires.
Specifications/Standard: ASTM A 240, A 480, B 366, B 462 – 464, B 468, B 471 – B 475, B 729, B 751, B 775, B 829, B 906, ASME SA-240, SA-480, SB-366, SB-462 – SB-464, SB-468, SB-471 – SB-475, SB-729, SB-751, SB-775, SB-829, SB-906
Chemical Composition:
Nickel (Ni): 32-38%
Chromium (Cr): 19-21%
Iron (Fe): Balance
Molybdenum (Mo): 2-3%
Copper (Cu): 3-4%
Niobium (Nb): 1% max
Carbon (C): 0.07% max
Silicon (Si): 1% max
Manganese (Mn): 2% max
Physical Constants and Thermal Properties
Density: 8.05 g/cm³
Melting Point: 1443-1453°C
Thermal Conductivity: 14.9 W/m.K
Electrical Resistivity: 1.08 ×10^-6 Ωm at room temperature
Mechanical Property:
Tensile Strength (annealed): 620 MPa
Yield Strength (annealed): 300 MPa
Elongation at break (annealed): 41%
