Alloy 31 valves and their use.
Alloy 31 valves are a iron-nickel-chrome-molybdenum steel alloyed with nitrogen. Alloy 31 is resistant to corrosion and erosion in phosphoric acid and is often used un bleaching plants and the pulp and paper industry.
Alloy 31 material specification and equivalents
| ASTM specification | B622 |
| European (DIN) Werkstoff number | 1.4562 |
| Unified Numbering System (UNS) | N08031 |
| Type | X1NiCrMoCu32-38-7 |
