321 vs 304 Stainless Steel Key Differences

1. Which is more corrosion-resistant after welding, 321 or 304? 321, as titanium prevents intergranular corrosion caused by welding heat.

2. Is 321 more expensive than 304? Yes, 321's titanium content increases its cost by approximately 15-25% compared to 304.

3. Can 304 replace 321 in high-temperature applications? No, 304 sensitizes at 425-815°C, while 321 maintains stability.

4. Do 321 and 304 have similar formability? Yes, both offer excellent cold and hot working properties with minor differences.

5. Which is better for food processing, 321 or 304? 304 suffices for most cases, but 321 is preferred for welded food equipment.