321 vs 347 Stainless Steel Comparison

1. What is the key difference between 321 and 347? 321 uses titanium; 347 uses niobium/tantalum for stabilization.

2. Which has better high-temperature performance? 347 withstands up to 900°C, slightly higher than 321's 870°C.

3. Is 347 more expensive than 321? Yes, niobium/tantalum increases 347's cost by 20-30% compared to 321.

4. Which is better for creep resistance? 321 has superior creep strength at 600-800°C.

5. Can 321 replace 347 in nuclear applications? No, 347 is preferred for nuclear due to better radiation stability.