Products
Contact Us
321 Stainless Steel Sheet
Keywords:
Category:
Product Details
321 stainless steel sheet is a titanium-stabilized austenitic stainless steel designed to improve high-temperature resistance and resistance to intergranular corrosion. It is developed based on 304 stainless steel by adding titanium (Ti), which stabilizes carbon and prevents carbide precipitation during welding or high-temperature exposure.
Because of this feature, 321 is widely used in heat-exposed and welded structural applications.
Chemical Composition of 321 Stainless Steel
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 12.0 |
| Titanium (Ti) | ≥ 5 × C content |
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Iron (Fe) | Balance |
Key Feature
The addition of titanium (Ti) stabilizes carbon and prevents chromium carbide formation, which improves performance in high-temperature and welded conditions.
321 vs 304 Stainless Steel – Key Comparison
| Feature | 321 Stainless Steel | 304 Stainless Steel |
|---|---|---|
| Stabilizing Element | Titanium (Ti) | None |
| High-Temperature Resistance | Better | Standard |
| Intergranular Corrosion Resistance | Excellent (after welding) | Moderate (risk after welding) |
| Weldability | Very good | Good |
| Corrosion Resistance | Similar | Good |
| Cost Level | Slightly higher | Lower |
Key Properties of 321 Stainless Steel Sheet
1. Excellent High-Temperature Performance
- Stable in continuous service up to ~800–900°C
- Suitable for thermal cycling conditions
- Better heat resistance than 304
2. Strong Resistance to Intergranular Corrosion
- Titanium prevents carbide precipitation
- Maintains corrosion resistance after welding
- Ideal for welded structures exposed to heat
3. Good Mechanical Strength
- Maintains strength at elevated temperatures
- Good ductility and toughness
- Suitable for forming and fabrication
4. Good Weldability
- Designed for welded applications
- No post-weld heat treatment required in most cases
Common Applications of 321 Stainless Steel Sheet
1. Aerospace and Automotive Industry
- Exhaust systems
- Engine components
- High-temperature piping
2. Heat Exchangers and Boilers
- Heat exchanger tubes and plates
- Boiler components
- Thermal equipment parts
3. Chemical and Petrochemical Industry
- High-temperature process equipment
- Pressure vessels
- Corrosive and heated environments
4. Industrial Furnaces
- Furnace parts
- Heat-resistant structural components
- Thermal processing systems
5. General Engineering
- Welded structural components
- Expansion joints
- Industrial machinery parts
Advantages of 321 Stainless Steel Sheet
- Excellent high-temperature resistance
- Strong resistance to weld-related corrosion
- Stable performance in thermal cycling environments
- Good mechanical strength and durability
- Suitable for welded structures
Limitations Compared to 304
- Slightly higher cost
- Similar corrosion resistance in normal environments
- Not necessary for non-heat applications
Teda Ganghua – Supply Capability
Teda Ganghua supplies 321 stainless steel sheets with stable quality and processing services:
- Multiple thickness and surface finishes available
- Precision cutting and fabrication support
- Strict chemical composition control
- Export packaging and global logistics
- Custom engineering solutions available
With strong supply capability, Teda Ganghua provides reliable stainless steel solutions for high-temperature and welded applications.
Product Inquiry
Relevant Products
TIANJIN TEDA GANGHUA
Tel: +86 22 86896631
Phone: +86 15822676888
Fax: +86 22 86896632
E-mail: sales1@tedaganghua.com
Office Hours:Mon – Fri / 9:00 AM – 6:00 PM
Address:Beichen Industrial Area, Beichen District, Tianjin 300400 China
Room A3101, Section 2, No. 122, Dongting Road, Tianjin Development Zone
Leave a message online
Copyright © 2023 TIANJIN TEDA GANGHUA