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Alloy 20, designated UNS N08020, is an austenitic corrosion-resistant alloy with a nominal composition of 35Ni-35Fe-20Cr-Cb. Small amounts of copper and molybdenum are added.
Alloy 20 was originally developed in 1951 for use in dilute sulfuric acid. The addition of niobium allows the alloy to be used without post-weld heat treatment. Alloy 20 flanges can be easily fabricated from ASTM B462 UNS N08020 forgings or ASTM B463 UNS N08020 sheet stock.
Nickel Alloy 20 Pipe Flange has a minimum tensile strength of up to 551MPa, which means it has high mechanical strength and durability and can withstand various pressure and tensile forces. At the same time, its minimum yield strength is as high as 241MPa, which makes the flange less likely to deform or bend when subjected to external forces. These mechanical properties make UNS N08020 Flanges ideal for joining a variety of industrial pipe connections, especially where high pressures and temperatures are required.
Additionally, due to its high melting point, ASTM B462 Alloy 20 Flanges can also be used in high temperature applications such as heat exchangers and heating equipment.
Alloy 20 Flanges Chemical Composition
| Grade | Alloy 20 |
|---|---|
| C | 0.07 max |
| Mn | 2.00 max |
| Si | 1.00 max |
| S | 0.035 max |
| Cu | 3.0 – 4.0 |
| Ni | 32.0 – 38.0 |
| Cr | 19.0 – 21.0 |
| Fe | 29.85 min |
| Mo | 2.0 – 3.0 |
| P | 0.045 max |
Mechanical Properties of Alloy 20 Flanges
| Grade | Alloy 20 |
|---|---|
| Density | 8.1 g/cm3 |
| Melting Point | 1443 °C (2430 °F) |
| Tensile Strength | Psi – 80,000 , MPa – 551 |
| Yield Strength (0.2%Offset) | Psi – 35,000 , MPa – 241 |
| Elongation | 30 % |
UNS N08020 Alloy 20 Flange
gnee can provide a variety of flange types, including butt welding flange, sliding sleeve flange, threaded flange, socket welding flange, blind flange, lap flange and LWN flange, etc. There are 7 levels to choose from: Level 150, Level 300, Level 400, Level 600, Level 900, Level 1500, and Level 2500.
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