SUS321 Stainless Steel Sheet/Plate: Specifications, Thickness and Price
What is SUS321 stainless steel?
SUS321 stainless steel is a Titanium-stabilized austenitic alloy designed to resist carbide precipitation and prevent intergranular corrosion at temperatures between 425–870°C. It offers mechanical strength comparable to SUS304, but with significantly better heat resistance, making it ideal for heat exchangers, furnace components, pressure vessels, exhaust systems, and high-temperature chemical processing equipment.
What is 321 stainless steel equivalent to?
321 stainless steel is a titanium-stabilized version of 304 stainless steel, possessing similar corrosion resistance but with superior high-temperature strength and resistance to intergranular corrosion. It is equivalent to other stainless steel grades, such as UNS S32100 (USA), 1.4541 and X6CrNiTi18-10 (European/DIN/EN standards), SUS321 (Japan), and 0Cr18Ni10Ti (China).
SUS321 Stainless Steel sheets Chemical Composition
| Element | C | Cr | Ni | Ti | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|---|
| SUS321 | ≤0.08 | 17.0–19.0 | 9.0–12.0 | ≥5 × C | ≤2.0 | ≤1.0 | ≤0.045 | ≤0.03 |
SUS321 Stainless Steel plate Mechanical Properties (Annealed Condition)
| Property | Value |
|---|---|
| Tensile Strength | 515–750 MPa |
| Yield Strength | ≥205 MPa |
| Elongation | ≥35% |
| Hardness | ≤217 HB |
| Density | 7.92 g/cm³ |
| Thermal Conductivity (100°C) | 16.3 W/m·K |
SUS321 Stainless Steel Sheet/Plate Specifications
| Supplier | GNEE |
| Complying Standards | ASTM A240 / JIS G4304 / EN 10088 |
| Available Thickness Range | Cold-rolled: 0.3–6.0 mmHot-rolled: 3–100 mm |
| Available Width | 1000 mm / 1219 mm / 1500 mm / 1800 mm / 2000 mm |
| Length | 2000–6000 mm (custom cutting available) |
| Surface Finishes | 2B, BA, No.1, No.4, HL, Mirror (8K) |
SUS321 Stainless Steel Sheet Price per KG
The recent global stainless steel market shows that SUS321 is generally 10–18% more expensive than SUS304 because of its Ti-stabilized alloy design.
| Grade | Typical Market Price (USD/kg) |
|---|---|
| SUS304 Sheet | 2.20 – 2.60 USD/kg |
| SUS321 Sheet | 2.50 – 3.10 USD/kg |
Factors affecting price:
Thickness (thicker = higher cost)
Surface finish (mirror and polished cost more)
Order size (bulk prices lower)
Raw material price (nickel & chromium)
Market supply & demand
If you need, I can also generate a country-specific price table (USA, UAE, Europe, India).
Click to get price lists for various countries
Applications of SUS321 Sheet/Plate
SUS321 is widely used in industries where thermal stability and anti-sensitization are essential:
• Chemical equipment
• Heat exchangers
• Automotive exhaust systems
• Boilers & furnace parts
• Pressure vessels
• Metallurgical processing
• Expansion bellows
• Oil & gas refinery components
Is SUS321 better suited for high-temperature applications than SUS304?
Yes, SUS321 is better suited for high-temperature applications than SUS304 because it contains titanium (Ti) as a stabilizing element. SUS321 stainless steel is used for high-temperature or gas corrosion resistant materials, manufacturing components for use under corrosive conditions of 400-900 degrees Celsius, and high-temperature welded structural components.
Is SUS321 easy to weld?
Yes. Its titanium stabilization treatment helps prevent weld corrosion, making it suitable for TIG/MIG welding using matching welding wires.
What is the difference between SUS321 and SUS316?
The main difference between SUS321 and SUS316 lies in their composition and applications: SUS321 has titanium (Ti) stability, providing good creep resistance at high temperatures, making it suitable for high-temperature environments. SUS316, on the other hand, is a molybdenum (Mo)-containing austenitic stainless steel with stronger corrosion resistance, especially suitable for environments with chlorides or acids/alkalis.
Is SUS321 magnetic?
SUS321 stainless steel is non-magnetic under normal conditions because it belongs to the austenitic stainless steel category. However, it may develop a weak magnetic field during cold working.
Why Choose GNEE for SUS321 Stainless Steel Sheets
• Over 18 years of export experience
• Ample stock of sheets and coils
• Certified by ASTM, JIS, and EN, with ISO/SGS/BV documentation
• Free samples available for material verification
• Factory inspection certificate (MTC 3.1/3.2)
• Fast delivery: 7-10 days
• Customizable surface treatments, cutting, and packaging
• Highly competitive factory-direct prices
