Incoloy 20, also known as Alloy 20, UNS N08020, and W.Nr. 2.4660, is a low carbon, niobium stabilised austentic nickel-iron-chromium alloy with alloying additions of copper and molybdenum, has excellent corrosion resistance in chemical environments containing sulfuric acid, and useful resistance to environments containing chlorides, nitric acid, and phosphoric acid. It also has good mechanical properties at both ambient and elevated temperatures. This alloy is commonly used in applications involving sulfuric acid, phosphoric acid, and other aggressive chemicals, as well as in the production of gasoline, solvents, explosives, chemicals, pharmaceuticals, and food and synthetic materials.
Whatsapp:
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sales@cocessalloys.comChemical Composition
|
Nickel (Ni) |
32.0-38.0 % |
|
Chromium (Cr) |
19.0-21.0 % |
|
Copper (Cu) |
3.0-4.0 % |
|
Molybdenum (Mo) |
2.0-3.0 % |
|
Iron (Fe) |
Balance |
|
Carbon (C) |
0.07 max. |
|
Niobium + Tantalum (Nb+Ta) |
8 x C -1.0 |
|
Manganese (Mn) |
2.0 max. |
|
Phosphorus (P) |
0.045 max. |
|
Sulfur (S) |
0.035 max. |
|
Silicon (Si) |
1.0 max. |
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 |
|
Coefficient of Expansion |
77-212°F, 10-6in/in•°F |
8.2 |
|
|
25-100°C, µm/m•°C |
14.7 |
|
Electrical Resistivity |
ohm•circ mil/ft |
651 |
|
µΩ•m |
1.08 |
|
|
EThermal Conductivity |
Btu•in/ft2•h•°F |
85 |
|
W/m•°C |
12.3 |
|
|
Permeability at 200 oersteds (15.9 kA/m) |
|
1.001 |
Mechanical Properties
|
Temperature |
Tensile Strength Rm |
Yield Strength |
Yield Strength Rp 1.0 |
Elongation |
||||
|
°C |
°F |
ksi |
MPa |
ksi |
MPa |
ksi |
MPa |
% |
|
20 |
68 |
80 |
550 |
35 |
240 |
40.6 |
280 |
30 |
Incoloy 20, also known as Alloy 20, finds applications in various industries due to its excellent corrosion resistance. Some common applications of Incoloy 20 include:
1. Chemical Processing: Incoloy 20 is used in chemical processing equipment, such as reactors, storage tanks, piping systems, and heat exchangers, particularly in environments containing sulfuric acid, phosphoric acid, and other corrosive chemicals.
2. Food Processing: It is utilized in equipment for the production of food and beverages, where corrosion resistance is essential for maintaining product purity and safety.
3. Pharmaceutical Equipment: Incoloy 20 is employed in pharmaceutical manufacturing processes where resistance to corrosion from acids and other chemicals is required.
4. Petrochemical Industry: This alloy is utilized in the production of gasoline, solvents, and other petrochemical products, where it offers resistance to corrosive environments.
5. Synthetic Fiber Production: Incoloy 20 is used in equipment for the production of synthetic fibers, where it provides corrosion resistance in acidic processing environments.
6. Marine Applications: It is also employed in marine environments where resistance to corrosion from seawater and salt spray is necessary.
Specifications for Incoloy 20 include the following:
|
Rod, Bar and wire |
Forgings |
Plate, Sheet and Strip |
Seamless Pipe and Tube |
Welded Pipe and Tube |
Fittings |
|
ASTM B 473/ASME SB 473 |
ASTM B 462/ ASME SB 462, B 472/ SB 472 |
ASTM B 463/ ASME SB 463 |
ASTM B 729/ ASTM B 829 |
ASTM B 468/ ASME SB 468, B 464/ SB 464 |
ASTM B 366/ ASME SB 366 |
Standard product forms of Incoloy 20 are pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon and wire. The products are available in a wide variety of sizes. Please contact us at sales@cocessalloys.com for full information.
