Introduction
321 stainless steel is a titanium-stabilized austenitic stainless steel designed for elevated temperature applications requiring excellent oxidation resistance, high strength, and superior resistance to intergranular corrosion after welding. It is widely used in heat exchangers, exhaust systems, pressure vessels, and high-temperature processing equipment.
StainlessSteelTrading.com supplies and sources 321 stainless steel products in various forms, dimensions, and international specifications. Through our global sourcing network, we provide dependable material solutions for industrial, commercial, and engineering projects worldwide.
Overview
321 stainless steel is stabilized with titanium, which helps prevent chromium carbide precipitation during exposure to elevated temperatures. This provides improved resistance to intergranular corrosion after welding while maintaining excellent oxidation resistance and mechanical strength at high temperatures.
Its reliable high-temperature performance and excellent fabrication characteristics make 321 stainless steel a preferred material for thermal processing equipment, aerospace components, refinery equipment, and industrial exhaust systems.
Key Features
| Excellent High-Temperature Resistance | Titanium Stabilized | Excellent Oxidation Resistance | Excellent Weldability |
| Intergranular Corrosion Resistance | Good Mechanical Strength | Long Service Life | Excellent Value |
Available Products
| Stainless Steel Pipes | Stainless Steel Tubes | Stainless Steel Sheets | Stainless Steel Plates | Stainless Steel Coils |
| Stainless Steel Flanges | Stainless Steel Pipe Fittings | Stainless Steel Forged Fittings | Stainless Steel Bars & Rods | Stainless Steel Fasteners |
Applications & Industries Served
321 stainless steel is widely used in elevated temperature applications where oxidation resistance, thermal stability, and dependable welded performance are essential.
Applications
- Heat Exchangers
- Furnace Components
- Aircraft Exhaust Systems
- Expansion Joints
- Pressure Vessels
- Thermal Processing Equipment
Industries Served
- Aerospace
- Power Generation
- Petrochemical
- Chemical Processing
- Oil & Gas
- Industrial Manufacturing
Material Properties
| Property | Value |
|---|---|
| Material Type | Austenitic Stainless Steel |
| Chromium | 17.0–19.0% |
| Nickel | 9.0–12.0% |
| Titanium | Stabilized Grade |
| Density | 7.9 g/cm³ |
| Maximum Service Temperature | Up to 870°C (Continuous) |
| Oxidation Resistance | Excellent |
| Weldability | Excellent |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | 321 |
| UNS | S32100 |
| EN | 1.4541 |
| DIN | X6CrNiTi18-10 |
| JIS | SUS321 |
Applicable Product Standards
| Product | Standard |
|---|---|
| Plates, Sheets & Coils | ASTM A240 |
| Pipes | ASTM A312 |
| Tubes | ASTM A213 / ASTM A269 |
| Bars & Rods | ASTM A276 |
| Pipe Fittings | ASTM A403 |
| Flanges | ASTM A182 |
| Fasteners | ASTM A193 / ASTM A194 |
Why Choose 321 Stainless Steel?
321 stainless steel is the preferred material for high-temperature applications where oxidation resistance, thermal stability, and reliable welded performance are critical. Its titanium stabilization minimizes the risk of intergranular corrosion during prolonged exposure to elevated temperatures, making it suitable for demanding industrial environments.
Available in multiple product forms, dimensions, and international standards, 321 stainless steel delivers dependable performance, excellent fabrication characteristics, and long service life for manufacturers, fabricators, and industrial end users requiring reliable high-temperature materials.
Need Assistance ?
Our team can assist you in selecting the appropriate 321 stainless steel product, dimensions, specifications, and material requirements for your application. Contact us for product availability, competitive pricing, technical guidance, and global sourcing support.