321 Stainless Steel Basic Properties & Titanium Stabilization

1. What makes 321 stainless steel different from 304? 321 is titanium-stabilized, avoiding intergranular corrosion after welding, while 304 lacks stabilization and may sensitize.

2. What is the role of titanium in 321 stainless steel? Titanium binds with carbon to form carbides, preventing chromium carbide precipitation and preserving corrosion resistance.

3. What is the maximum service temperature of 321? It can operate continuously at up to 870℃ and withstand short-term peaks of 925℃.

4. Is 321 suitable for welded structures? Yes, its titanium stabilization eliminates the need for post-weld annealing in most cases.

5. What is the UNS code for 321 stainless steel? UNS S32100.