Overview
SS310 (AISI 310 Stainless Steel) is a high-alloy austenitic stainless steel belonging to the 300 Series Heat-Resistant Stainless Steel Family. Featuring elevated chromium and nickel content, SS310 offers exceptional oxidation resistance, outstanding high-temperature strength, and excellent resistance to thermal cycling.
SS310 is specifically designed for continuous operation in extreme heat environments up to 1100°C–1150°C, making it one of the most widely used stainless steels for furnaces, kilns, burners, heat exchangers, thermal processing equipment, petrochemical systems, and power generation facilities.
Compared with SS309, SS310 offers higher temperature resistance and improved oxidation performance. Compared with nickel-based alloys such as Inconel, SS310 provides a more economical solution for many high-temperature applications.
Material Specification
| Property | Value |
|---|---|
| Material Designation | AISI 310 |
| Material Family | Austenitic Heat-Resistant Stainless Steel |
| UNS Number | S31000 |
| EN Grade | 1.4845 |
| Density | 7.90 g/cm³ |
| Magnetic Property | Non-Magnetic (Annealed) |
| Standard Forms | Sheet, Plate, Coil, Pipe, Tube, Bar, Wire |
Chemical Composition
| Element | Content (%) |
|---|---|
| Iron (Fe) | Balance |
| Chromium (Cr) | 24.0–26.0 |
| Nickel (Ni) | 19.0–22.0 |
| Carbon (C) | ≤0.25 |
| Manganese (Mn) | ≤2.00 |
| Silicon (Si) | ≤1.50 |
| Phosphorus (P) | ≤0.045 |
| Sulfur (S) | ≤0.030 |
| Nitrogen (N) | ≤0.10 |
Mechanical Properties
Annealed Condition
| Property | Value |
|---|---|
| Tensile Strength | ≥520 MPa |
| Yield Strength | ≥205 MPa |
| Elongation | ≥40% |
| Hardness | ≤95 HRB |
| Elastic Modulus | 200 GPa |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.90 g/cm³ |
| Melting Point | 1400–1455°C |
| Thermal Conductivity | 14.2 W/m·K |
| Electrical Resistivity | 0.78 μΩ·m |
| Thermal Expansion Coefficient | 15.9 × 10⁻⁶/K |
| Specific Heat Capacity | 500 J/kg·K |
High Temperature Performance
| Temperature | Performance |
|---|---|
| 800°C | Outstanding |
| 900°C | Outstanding |
| 1000°C | Outstanding |
| 1050°C | Excellent |
| 1100°C | Excellent |
| 1150°C | Intermittent Service |
Maximum Service Temperature
| Condition | Temperature |
|---|---|
| Continuous Service | 1100°C |
| Intermittent Service | 1150°C |
Corrosion Resistance
| Environment | Performance |
|---|---|
| Atmospheric Exposure | Excellent |
| Industrial Environment | Excellent |
| High Temperature Oxidation | Outstanding |
| Carburizing Atmospheres | Excellent |
| Sulfidation Resistance | Excellent |
| Marine Environment | Good |
| Chloride Environment | Moderate |
SS310 exhibits exceptional oxidation resistance because of its high chromium and nickel content, making it suitable for prolonged exposure to extreme temperatures.
International Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM / AISI (USA) | 310 |
| UNS | S31000 |
| EN (Europe) | 1.4845 |
| DIN (Germany) | X15CrNi25-20 |
| JIS (Japan) | SUS310 |
| GB/T (China) | 0Cr25Ni20 |
| ISO | X15CrNi25-20 |
Available Forms
| Product Type | Availability |
|---|---|
| Stainless Steel Sheet | Yes |
| Stainless Steel Plate | Yes |
| Stainless Steel Coil | Yes |
| Stainless Steel Pipe | Yes |
| Stainless Steel Tube | Yes |
| Stainless Steel Bar | Yes |
| Stainless Steel Wire | Yes |
| Heat Resistant Castings | Yes |
Typical Applications
Furnace Industry
- Furnace Liners
- Furnace Doors
- Furnace Rollers
- Heat Treatment Fixtures
- Furnace Conveyors
Petrochemical Industry
- Refinery Equipment
- Thermal Reactors
- Cracking Furnaces
- Catalyst Systems
Power Generation
- Boiler Components
- Burner Assemblies
- Flue Gas Equipment
- Heat Recovery Systems
Industrial Heating Equipment
- Kilns
- Ovens
- Incinerators
- Thermal Chambers
Metallurgical Industry
- Annealing Equipment
- Heat Shields
- Thermal Baskets
- Material Handling Systems
Glass & Cement Industry
- Kiln Components
- Burner Systems
- Heat Resistant Supports
- Thermal Processing Equipment
Manufacturing Characteristics
| Manufacturing Process | Rating |
|---|---|
| Laser Cutting | Excellent |
| Plasma Cutting | Excellent |
| Waterjet Cutting | Excellent |
| CNC Machining | Good |
| Welding | Excellent |
| TIG Welding | Excellent |
| MIG Welding | Excellent |
| Forming | Good |
| Bending | Good |
| Polishing | Good |
Advantages
Outstanding High-Temperature Resistance
One of the highest temperature-capable stainless steels available.
Exceptional Oxidation Resistance
Maintains protective oxide layers under extreme heat.
Excellent Thermal Cycling Performance
Suitable for repeated heating and cooling cycles.
Good Corrosion Resistance
Performs well in industrial and chemical environments.
Excellent Weldability
Can be fabricated into complex high-temperature assemblies.
Long Service Life
Reduces maintenance and replacement costs.
Limitations
Higher Material Cost
More expensive than SS304 and SS309.
Lower Strength at Room Temperature Than Duplex Grades
Optimized for heat resistance rather than structural strength.
Lower Chloride Resistance Than SS316
Not ideal for seawater immersion applications.
Moderate Machinability
Requires proper tooling and machining parameters.
Comparison with Other Stainless Steels
| Property | SS310 | SS309 | SS304 | SS316 | SS321 |
|---|---|---|---|---|---|
| Heat Resistance | Outstanding | Excellent | Good | Good | Excellent |
| Oxidation Resistance | Outstanding | Excellent | Good | Good | Excellent |
| Continuous Service Temperature | 1100°C | 1000°C | 870°C | 870°C | 900°C |
| Corrosion Resistance | Excellent | Excellent | Excellent | Outstanding | Excellent |
| Weldability | Excellent | Excellent | Excellent | Excellent | Excellent |
| Cost | Very High | High | Medium | High | High |
Comparison with High-Temperature Materials
| Material | Max Service Temp | Oxidation Resistance | Cost |
|---|---|---|---|
| SS310 | 1100°C | Outstanding | High |
| SS309 | 1000°C | Excellent | Medium-High |
| SS321 | 900°C | Excellent | High |
| Inconel 600 | 1175°C | Outstanding | Very High |
| Inconel 625 | 980°C | Outstanding | Extremely High |
| Carbon Steel | 500°C | Poor | Low |
Available Surface Finishes
Mill Finishes
- No.1 Finish
- 2B Finish
- BA Finish
- Hot Rolled Finish
Industrial Finishes
- Pickled Finish
- Descaled Surface
- Passivated Surface
Decorative Finishes
- Mirror Polish
- Satin Finish
- Brushed Finish
- Glass Bead Finish
Frequently Asked Questions (FAQ)
What is SS310 stainless steel?
SS310 is a high-temperature austenitic stainless steel engineered for extreme heat and oxidation resistance.
What is SS310 used for?
Typical applications include:
- Industrial Furnaces
- Heat Treatment Equipment
- Kilns
- Burners
- Petrochemical Processing Systems
- Thermal Processing Equipment
Is SS310 better than SS309?
For higher temperature applications, yes.
| Property | SS310 | SS309 |
|---|---|---|
| Chromium Content | Higher | Lower |
| Nickel Content | Higher | Lower |
| Max Service Temperature | 1100°C | 1000°C |
| Oxidation Resistance | Better | Excellent |
What is the difference between SS310 and SS316?
| Property | SS310 | SS316 |
|---|---|---|
| Heat Resistance | Outstanding | Good |
| Chloride Resistance | Moderate | Excellent |
| Marine Applications | Limited | Recommended |
| Furnace Applications | Excellent | Limited |
Is SS310 suitable for furnace applications?
Yes. SS310 is one of the most commonly used stainless steels for industrial furnace construction.
Can SS310 be welded?
Yes. SS310 offers excellent weldability using TIG, MIG, plasma, and resistance welding processes.
Is SS310 food grade?
Although corrosion resistant, SS310 is generally selected for thermal processing rather than food-processing applications.
Why is SS310 used in high-temperature equipment?
Because it combines:
- Exceptional Heat Resistance
- Outstanding Oxidation Resistance
- Excellent Weldability
- Long-Term Thermal Stability
making it ideal for extreme-temperature industrial environments.
Does GCNOV provide custom manufacturing services for SS310?
Yes. GCNOV provides:
- CNC Machining
- Laser Cutting
- Plasma Cutting
- Sheet Metal Fabrication
- Furnace Component Manufacturing
- Welding & Assembly
- Heat Resistant Equipment Fabrication
- Prototype Development
- Low-Volume Production
- Mass Production