Type 321 is a stabilized austenitic stainless steel similar to type 304 but with a titanium addition. This titanium addition reduces or prevents carbide precipitation during welding and in 800 - 1500 °F (427 - 816 °C) service. It also improves the elevated temperature properties of the alloy. Type 321 provides excellent resistance to oxidation and corrosion and possesses good creep strength.
Type 321 is a stabilized austenitic stainless steel similar to type 304 but with a titanium addition. This titanium addition reduces or prevents carbide precipitation during welding and in 800 - 1500 °F (427 - 816 °C) service. It also improves the elevated temperature properties of the alloy. Type 321 provides excellent resistance to oxidation and corrosion and possesses good creep strength.
Specification
Represented by ASTM A213 and ASME SA-213 specification.
| Element | Weight Percentage Maximum Unless Range is Specified |
| 321 | |
| Carbon* | 0.08 |
| Manganese | 2.00 |
| Phosphorus | 0.045 |
| Sulfur | 0.030 |
| Silicon | 0.75 |
| Chromium | 17.00-19.00 |
| Nickel | 9.00-12.00 |
| Columbium + Tantalum** | -- |
| Tantalum | -- |
| Titanium** | 5x(C+N) min to 0.70 max |
| Cobalt | -- |
| Nitrogen | 0.10 |
| Iron | Balance |
Applications
Jet aircraft components
Oil refinery equipment
Stack liners
Industrial boilers
Pressure vessels
Heat exchangers
In 2016, it signed a strategic cooperation agreement with major domestic stainless steel factories for the sales of medium and heavy plates and special steel products, which also enabled the company to have new and brighter sales varieties. At the same time, it provides one-stop service for cutting, cutting, forming and and surface processing of stainless steel.
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