Products
Contact Us
Stainless Steel 321 Sheets
321 stainless steel sheets are a titanium-stabilized austenitic grade designed for high-temperature and welded applications.
Keywords:
Category:
Product Details
321 stainless steel is a stabilized austenitic stainless steel that contains titanium (Ti) to prevent carbide precipitation during welding.
- It is designed for high-temperature applications where welding or heat exposure may cause intergranular corrosion in standard 304 stainless steel.
- The addition of titanium enhances its stability and maintains corrosion resistance at elevated temperatures.
Chemical Composition of 321 Stainless Steel
| Element | Typical Content (%) |
|---|---|
| Chromium (Cr) | 17 – 19 |
| Nickel (Ni) | 9 – 12 |
| Carbon (C) | ≤ 0.08 |
| Titanium (Ti) | ≥ 5 × C% (minimum 0.5%) |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.03 |
| Nitrogen (N) | ≤ 0.10 |
Key Points:
- Titanium stabilizes the steel, preventing chromium carbide formation at grain boundaries
- This maintains intergranular corrosion resistance, especially after welding
- Chromium and nickel provide standard corrosion resistance and mechanical strength
Mechanical Properties
| Property | Typical Value |
|---|---|
| Yield Strength | ≥ 205 MPa |
| Tensile Strength | 515 – 700 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 95 HRB |
High-Temperature Performance
- Maintains strength and corrosion resistance up to 870°C continuous service
- Resistant to oxidation in high-temperature atmospheres
Corrosion Resistance
- Excellent resistance to oxidation and corrosion in high-temperature environments
- Performs well in chemical processing, food, and beverage industries
- Superior to 304 in welded or heat-exposed components due to titanium stabilization
Fabrication and Processing
Welding
- Titanium prevents sensitization, so welded joints remain corrosion-resistant
- Can be welded using standard techniques without post-weld annealing
Machining
- Moderate machinability; easier in annealed condition
- Requires careful tool selection for hard or cold-worked material
Forming
- Good ductility allows bending, stamping, or rolling
- Hairline or polished finishes are achievable after forming
Common Applications of 321 Stainless Steel Sheets
High-Temperature Industrial Applications
- Furnace components and heat exchangers
- Boiler tubing and combustion chambers
- Hot gas ducts and chimneys
Chemical and Petrochemical Equipment
- Reactor vessels and chemical tanks
- Piping systems in high-temperature or corrosive environments
Food, Beverage, and Pharmaceutical
- Equipment exposed to high heat and corrosion
- Pasteurizers, sterilizers, and dairy processing components
Architectural Applications
- Components exposed to high temperature or steam
- Decorative panels requiring corrosion resistance under thermal stress
Summary Table: 321 Stainless Steel Features
| Feature | Description |
|---|---|
| Material Type | Austenitic stainless steel (titanium-stabilized) |
| Carbon Content | ≤ 0.08% |
| Titanium Addition | Prevents carbide precipitation, improves high-temp stability |
| Corrosion Resistance | Excellent, especially after welding or heat exposure |
| Mechanical Properties | Moderate strength, high ductility |
| High-Temperature Resistance | Up to 870°C continuous service |
| Typical Applications | Furnaces, heat exchangers, chemical reactors, high-temp piping |
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