ALLOY 20

Alloy 20

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Product Description

Alloy 20

Alloy 20

Alloy 020 (UNS N08020) has excellent corrosion resistance in chemical environments containing sulfuric acid, and useful resistance to environments containing chlorides, nitric acid, and phosphoric acid. Other uses include the production of gasoline, solvents, explosives, inorganic and organic chemicals, pharmaceuticals, and food and synthetic materials. INCOLOY alloy 020 is readily fabricated to produce mixing tanks, heat exchangers, process piping, pickling equipment, pumps, valves, fasteners and fittings. Applications for alloy 20 requiring resistance
to aqueous corrosion are essentially the same as those for INCOLOY alloy 825.

 
Table 1 – Limiting Chemical Composition, %

Nickel …………………………………………………………….…..32.0-38.0
Chromium……………………………………………………….…..19.0-21.0
Copper ……………………………………………………………..…….3.0-4.0
Molybdenum …………………………………………………….…….2.0-3.0
Iron ………………………………………………………….…….…….Balance*
Carbon…………………………………………………………………0.07 max.
Niobium + Tantalum ………………………………….…………8 x C -1.0
Manganese ………………………………………………..………….2.0 max.
Phosphorus ………………………………………………..……..0.045 max.
Sulfur ………………………………………………..……….………0.035 max.
Silicon ……………………………………………………………………1.0 max.
*Reference to the ‘balance’ of a composition does not guarantee this
is exclusively of the element mentioned but that it predominates and
others are present only in minimal quantities.

 

Table2 – Physical Properties

Density, lb/in3……………………………………………………………0.292
g/cm3…………………………………………………………….………….8.08
Shear Modulus, 103 ksi …………………………………..……………….11
GPa……………………………………………………………………..……..76
Young’s Modulus, 103 ksi …………………………………….………….28
GPa……………………………………………………………………………193
Specific Heat, Btu/lb•°F …………………………………………………0.12
J/kg•°C………………………………………………………………………500
Electrical Resistivity, ohm•circ mil/ft ………………………………651
μΩ•m……………………………………………………………………….1.08
Thermal Conductivity, Btu•in/ft2•h•°F……………………….………85
W/m•°C ………………………………………………………………….…….12.3
Coefficient of Expansion, 77-212°F, 10-6 in/in•°F ……………8.2
25-100°C, μm/m•°C …………………………………………………14.7

 
Table 3 – Typical Room Temperature Mechanical Properties

Tensile Strength, ksi …………………………………………………………90
MPa……………………………………………………………………………620
Yield Strength (0.2% Offset), ksi …………………………………..…..45
MPa …………………………………………………………………..……300
Elongation, % …………………………………………………………….…….40