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Nickel alloy 20 is a low-carbon, niobium-stabilized austenitic nickel/iron/chromium alloy with additions of molybdenum and copper. It exhibits exceptional corrosion resistance in chemical environments containing phosphoric acid, nitric acid, chlorides and sulfuric acid. It also has good mechanical properties at both ambient and elevated temperatures.
Chemical Composition
The chemical composition nickel alloy 20 is outlined in the following table.
Element | Content (%) |
Iron, Fe | 35 |
Nickel, Ni | 32-38 |
Chromium, Cr | 19-21 |
Copper, Cu | 3-4 |
Manganese, Mn | ≤2 |
Molybdenum, Mo | 2-3 |
Niobium, Nb | ≤1 |
Silicon, Si | ≤1 |
Carbon, C | ≤0.07 |
Phosphorous, P | ≤0.045 |
Sulfur, S | ≤0.035 |
Physical Properties
The following table shows the physical properties of nickel alloy 20.
Properties | Metric | Imperial |
Density | 8.05 g/cm3 | 0.291 lb/in3 |
Mechanical Properties
The mechanical properties of nickel alloy 20 are displayed in the following table.
Properties | Metric | Imperial |
Tensile strength (annealed) | 620 MPa | 89900 psi |
Yield strength (annealed) | 300 MPa | 43500 psi |
Elongation at break (annealed) | 41% | 41% |
Thermal Properties
The thermal properties of nickel alloy 20 are given in the following table
Properties | Metric | Imperial |
Thermal expansion co-efficient (@20-100°C/68-212°F) | 14.7 µm/m°C | 8.17 µin/in°F |
Thermal conductivity | 12.3 W/mK | 85.4 BTU.in/hrft².°F |
Other Designations
Other designations that are equivalent to nickel alloy 20 include the following:
ASME SB-462 - SB-464
ASME SB-468
ASTM B 462 - B 464
ASTM B 468
ASTM B 472 - B 474
ASTM B 751
Applications
The following are the list of applications of nickel 205 alloy:
Production of plastics and synthetic fibers
Chemical and petroleum processing equipment
Mixing tanks
Heat exchangers
Process piping
Specifications
Alloy 20 Bar | ASTM B 473 |
Alloy 20 Plate | ASME SB-463, ASME SB-464, ASTM B 463, ASTM B 464 |
Alloy 20 Sheet | ASME SB-463, ASME SB-464, ASTM B 463, ASTM B 464 |
Alloy 20 Strip | ASME SB-463, ASME SB-464, ASTM B 463, ASTM B 464 |
Alloy 20 Wire | ASME SB-473 ASME SB-366, ASTM B 473, ASTM B 366 |
Alloy 20 Weld Wire | AWS ER320LR, ASTM Weld Tube B468 |
Alloy 20 Weld Pipe | ASTM B464 |
Alloy 20 Other | UNS N08020, Werkstoff Nr. 2.4660, Covered Electrodes AWS E320LR, Fordings ASTM B462 |
Nickel alloy 20 is a low-carbon, niobium-stabilized austenitic nickel/iron/chromium alloy with additions of molybdenum and copper. It exhibits exceptional corrosion resistance in chemical environments containing phosphoric acid, nitric acid, chlorides and sulfuric acid. It also has good mechanical properties at both ambient and elevated temperatures.
Chemical Composition
The chemical composition nickel alloy 20 is outlined in the following table.
Element | Content (%) |
Iron, Fe | 35 |
Nickel, Ni | 32-38 |
Chromium, Cr | 19-21 |
Copper, Cu | 3-4 |
Manganese, Mn | ≤2 |
Molybdenum, Mo | 2-3 |
Niobium, Nb | ≤1 |
Silicon, Si | ≤1 |
Carbon, C | ≤0.07 |
Phosphorous, P | ≤0.045 |
Sulfur, S | ≤0.035 |
Physical Properties
The following table shows the physical properties of nickel alloy 20.
Properties | Metric | Imperial |
Density | 8.05 g/cm3 | 0.291 lb/in3 |
Mechanical Properties
The mechanical properties of nickel alloy 20 are displayed in the following table.
Properties | Metric | Imperial |
Tensile strength (annealed) | 620 MPa | 89900 psi |
Yield strength (annealed) | 300 MPa | 43500 psi |
Elongation at break (annealed) | 41% | 41% |
Thermal Properties
The thermal properties of nickel alloy 20 are given in the following table
Properties | Metric | Imperial |
Thermal expansion co-efficient (@20-100°C/68-212°F) | 14.7 µm/m°C | 8.17 µin/in°F |
Thermal conductivity | 12.3 W/mK | 85.4 BTU.in/hrft².°F |
Other Designations
Other designations that are equivalent to nickel alloy 20 include the following:
ASME SB-462 - SB-464
ASME SB-468
ASTM B 462 - B 464
ASTM B 468
ASTM B 472 - B 474
ASTM B 751
Applications
The following are the list of applications of nickel 205 alloy:
Production of plastics and synthetic fibers
Chemical and petroleum processing equipment
Mixing tanks
Heat exchangers
Process piping
Specifications
Alloy 20 Bar | ASTM B 473 |
Alloy 20 Plate | ASME SB-463, ASME SB-464, ASTM B 463, ASTM B 464 |
Alloy 20 Sheet | ASME SB-463, ASME SB-464, ASTM B 463, ASTM B 464 |
Alloy 20 Strip | ASME SB-463, ASME SB-464, ASTM B 463, ASTM B 464 |
Alloy 20 Wire | ASME SB-473 ASME SB-366, ASTM B 473, ASTM B 366 |
Alloy 20 Weld Wire | AWS ER320LR, ASTM Weld Tube B468 |
Alloy 20 Weld Pipe | ASTM B464 |
Alloy 20 Other | UNS N08020, Werkstoff Nr. 2.4660, Covered Electrodes AWS E320LR, Fordings ASTM B462 |
