Type 321H, is a titanium stabilized austenitic stainless steel that is known for its general corrosion resistance. This higher carbon version of Type 321 stainless steel offers a wide variety of benefits including:
Excellent resistance oxidation to 1500°F (816°C)
Good low temperature toughness
Comparable corrosion resistance and machinability to Type 304
Readily welded by most standard processes
Very ductile and forms easily
Chemical Analysis
Weight % (all values are maximum unless a range is otherwise indicated)
| Element | 321H |
|---|---|
| Chromium | 17.00 min.-19.00 max. |
| Nickel | 9.00 min.-12.00 max. |
| Carbon | 0.04 min.-0.14 max. |
| Manganese | 2.00 |
| Phosphorus | 0.045 |
| Sulfur | 0.03 |
| Silicon | 0.75 |
| Titanium | 4 x (C + N) min.-0.70 max. |
| Nitrogen | 0.10 |
| Iron | Balance |
Fabrication Data
Alloy 321 stainless steel plate can be easily welded and processed by standard shop fabrication practices.
Cold Forming
The alloy is quite ductile and forms easily.
Hot Forming
The high sulfur content of Alloy 303 also has a detrimental impact on hot workability. If hot forming is required, once again, 304 should be considered as an alternate selection.
Machining
The cold work hardening rate of 321 stainless steel plate makes it less machinable than 410 stainless steel, but similar to 304. The table below provides relevant machining data.
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