Alloy 321 & 321H Stainless Steel

Alloy 321 & 321H Stainless Steel

Applications
Properties
- Prevents harmful carbide precipitation in the heat affected zone (HAZ) of the weld area
- Imparts partial immunity to inter granular corrosion
- Reduced embrittlement in the HAZ of the weld area
321H stainless steel is a widely used stainless steel, where parts are heated within carbide-precipitation temperature range (800°F-1500°F) and exposed to corrosive atmosphere. 321 stainless steel is similar to 304 stainless steel, but with higher nickel content and stabilized with titanium. Titanium preferentially reacts with carbon in the steel and prevents precipitation of chromium carbides at the grain boundaries, thus preserving corrosion-resistant properties by preventing depletion of chromium near the grain boundaries during exposure within critical temperature range. This grade responds well to hardening by cold working. It has good welding characteristics; and post-weld annealing is not normally required to restore its excellent performance in a wide range of corrosive conditions.
- Responds well to hardening by cold working
- Good welding characteristics
- Excellent corrosion resistance in a wide variety of corrosive media
- High creep & stress rupture properties
Type | Sizes | Schedules | ASTM Standards |
---|---|---|---|
Bar | A276, A479 | ||
Butt Weld Fittings | 1/2″ thru 12″ | Sch 10, 40, 80, 160 & XXH | A403 |
Forgings | A182 | ||
Pipe Welded & Seamless | 1/4″ thru 16″ | Sch 10, 40, 80, 160 & XXH | A312 |
Tube, Welded | A249 | ||
Tube, Seamless | A213 | ||
Plate | A240 | ||
Flange & Pressure Fittings | All Descriptions |