321H Stainless Steel Plate - UNS S32109
321H is a widely used stainless steel, where parts are heated within carbide-precipitation temperature range (800°F-1500°F) and exposed to corrosive atmosphere. 321H is similar to 304, 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.
United Performance Metals supplies 321H stainless steel plate in a variety of lengths and widths and can custom cut to your exact specifications.
Standard Industry Specifications
- UNS S32109
- ASTM A 240
- RR SABRe Edition 2
- DFARS Compliant
Common Trade Names
- ATI 321 (™ Allegheny Technologies)
Common Applications of 321H Stainless Steel
- Heat exchangers
- Aircraft industry
- Fabrication industry
- High temperature chemical process equipment
- Refinery industry equipment oil refineries
Inventory Size Range
- Plate : 0.007" - .500"
Please contact us for more details.
The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.
321H Chemical Composition
|Element||Percent by Weight|
|Chromium||17.0 - 19.0|
|Nickel||9.0 - 12.0|
|Titanium||5 (C+N) - 0.700|
321H Physical Properties
- Density: 7.9 kg/m3
- Melting Range: 1400 - 1450°C
|Specific Heat Capacity||500 J/kgK|
|Thermal Conductivity (@100°C)||16.2 [W/mK]|
|Modulus of Elasticity||193|
Mechanical Properties and Yield Strength of 321H
|Yield Strength, ksi||30|
|Tensile strength, ksi||75|