Nickel-based alloys are alloys that have a combination of high strength and certain resistance to oxidation and corrosion at high temperatures of 650 to 1000 °C. According to the main performance, it is subdivided into nickel-based heat-resistant alloy, nickel-based corrosion-resistant alloy, nickel-based wear-resistant alloy, nickel-based precision alloy and nickel-based shape memory alloy. Superalloys are classified into iron-based superalloys, nickel-based superalloys and cobalt-based superalloys according to the matrix. Among them, nickel-based superalloys are referred to as nickel-based alloys.
Designated as UNS N08020, Alloy 20 (also known as “Incoloy 020” or “Incoloy 20”) is a nickel-iron-chromium alloy with additions of copper and molybdenum. It has exceptional corrosion resistance to sulfuric acid, choloride stress-corrosion cracking, nitric acid, and phosphoric acid. Alloy 20 can be readily hot-formed or cold-formed to valves, pipe fittings, flanges, fasteners, pumps, tanks, as well as heat exchanger components. The hot forming temperature should be in the range of 1400-2150°F [760-1175°C]. Usually, the heat treatment of annealing should be conducted at the temperature range of 1800-1850°F [982-1010°C]. Alloy 20 is widely used for the production of gasoline, organic & inorganic chemicals, pharmaceutical processing, and food industry.
ASTM B366 UNS N08020, Incoloy 020 elbows and tees.
The Chemical Composition of Alloy 20, % | |
---|---|
Nickel | 32.0-38.0 |
Chromiun | 19.0-21.0 |
Copper | 3.0-4.0 |
Molybdenum | 2.0-3.0 |
Iron | Balance |
Carbon | ≤0.07 |
Niobium+tantalum | 8*C-1.0 |
Managanese | ≤2.00 |
Phosphorus | ≤0.045 |
Sulfur | ≤0.035 |
Silicon | ≤1.00 |
ASTM B462 Alloy 20 (UNS N08020) forged fittings and forged flanges.
Tensile Strength, min. | Yield Strength, min. | Elongation, min. | Young's Modulus | |||
---|---|---|---|---|---|---|
Mpa | ksi | Mpa | ksi | % | 103ksi | Gpa |
620 | 90 | 300 | 45 | 40 | 28 | 193 |
Density | Specific Heat | Electrical Resistivity | Thermal Conductivity |
---|---|---|---|
g/cm3 | J/kg.°C | µΩ·m | W/m.°C |
8.08 | 500 | 1.08 | 12.3 |
Product Form | Standard |
---|---|
Rod, bar and wire | ASTM B473, B472, B462 |
Plate, sheet and strip | ASTM A240, A480, B463, B906 |
Seamless pipe and tube | ASTM B729, B829 |
Welded pipe | ASTM B464, B775 |
Welded tube | ASTM B468, B751 |
Welded fittings | ASTM B366 |
Forged flanges and forged fittings | ASTM B462, B472 |
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