321 Stainless Steel Furnace Parts: Welded Liners and Fixtures

1. What furnace components use 321? Liners, fixtures, radiant tubes, and furnace doors.

2. Can 321 be used in vacuum furnaces? Yes, it performs well in vacuum high-temperature environments.

3. What is 321's service life in furnaces? 4-7 years under continuous operation at 800°C.

4. Is 321 better than 309 for furnace parts? 309 has higher temperature resistance, but 321 is better for welded structures.

5. How to repair 321 furnace components? Weld repair with ER321 consumables, followed by pickling/passivation.