ALLOY 20 - WERKSTOFF 2.4660 UNS N08020
ALLOY 20 alloy, werkstoff 2.4660 UNS N08020, is an austenitic superalloy developed to offer exceptional corrosion resistance, particularly in acidic environments. This alloy is composed mainly of nickel, iron, and chromium, with the addition of copper and molybdenum to further enhance its corrosion and pitting resistance.
In the area of fastener manufacturing, the use of ALLOY 20, werkstoff 2.4660 UNS N08020 is highly advantageous in applications where corrosion could compromise fastener integrity and durability. The alloy is particularly effective against sulfuric acid, phosphoric acid, and other chemically aggressive environments, making it ideal for industries such as chemical, petrochemical, pharmaceutical, and food processing.
Chemical Composition
| Ni | Cr | Fe | Mo | C | Mn | S | Yes | P | Cu | Nb | |
| Min | 32.50 | 19,00 | 2.00 | — | — | — | — | — | 3.00 | 8xC | |
| Max | 38.00 | 21,00 | bal | 3.00 | 0,07 | 2,00 | 0,035 | 1,00 | 0,045 | 4.00 | 1.00 |
Mechanical Properties
| Material | League | Rm min (MPa) | Rp 0.2 min (MPa) | A% min | Hardness max (HB) |
|---|---|---|---|---|---|
| ALLOY 20 | 2.4660 | 551 | 241 | 30 | 325 |
Physical Properties
- Specific gravity at 20°C: 8.08 kg/dm³
- Modulus of elasticity at 20°C: 193,000 N/mm²
- Coefficient of expansion at 20°C: 14.36 µm/m °C
Correspondence and Specifications
| W. | UNS | ISO |
|---|---|---|
| 2.4660 | N08020 | 15156-3 |