Alloy 20
About Alloy 20
What is Alloy 20 UNS N08020?
Alloy 20 (UNS N08020) is an austenitic superalloy composed of nickel, iron, and chromium, with added copper and molybdenum for enhanced resistance to harsh environments, pitting, and crevice corrosion.
Stabilized with columbium, it minimizes carbide precipitation during welding. Alloy 20 combines features of both stainless steel and nickel alloys, making it ideal for environments requiring acid resistance. It is specifically designed for superior resistance to stress-corrosion cracking in boiling sulfuric acid concentrations of 20% to 40%, and also offers excellent general corrosion resistance to sulfuric acid and chloride stress corrosion cracking.
Easily fabricated, Alloy 20 is commonly used for producing mixing tanks, heat exchangers, process piping, pickling equipment, flanges, valves, fasteners, and fittings. Its applications in aqueous corrosion environments closely parallel those of Alloy 825.
Alloy 20 UNS N08020 Standards
ASTM B729
-Pipe & Tube
DIN 17744
-Other
ASTM B462
-Rod & Bar
ASTM A240
-Plate, Sheet, Strip & Foil
Alloy 20 UNS N08020 Chemical Composition
Alloy 20 UNS N08020 Data Sheet
Alloy 20 UNS N08020 Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS | GOST | AFNOR | JIS | BS | EN | OR |
| Alloy 20 | 2.4660 | N08020 | – | – | – | – | – | – |
Alloy 20 UNS N08020 Mechanical Properties
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.08 g/cm3 | 1443 °C (2430 °F) | 620Mpa | 300Mpa | 40% |
Alloy 20 UNS N08020 Applications
Alloy 20 UNS N08020 Related Resources
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