Stainless Steel 310 (UNS S31000 / EN 1.4841)
Stainless Steel 310 (UNS S31000 / EN 1.4841) – Specifications, Properties and Applications
Stainless Steel 310 (UNS S31000 / EN 1.4841) is a high chromium, high nickel austenitic stainless steel specifically developed for applications requiring exceptional resistance to oxidation and excellent mechanical strength at elevated temperatures. It is widely recognized for its outstanding heat resistance, superior thermal stability, and excellent corrosion resistance in high-temperature environments.
Grade 310 is designed to withstand continuous exposure to elevated temperatures while maintaining its mechanical properties. It is commonly used in industrial furnaces, heat treatment equipment, boilers, heat exchangers, petrochemical plants, power generation facilities, refineries, and thermal processing industries.
Emirerri Steel supplies Stainless Steel 310 in sheets, plates, coils, pipes, tubes, round bars, flanges, and pipe fittings to customers across Tunisia, Algeria, Morocco, Libya, and international markets.
Key Features of Stainless Steel 310
Excellent high-temperature oxidation resistance
Superior heat resistance
High chromium and nickel content
Excellent thermal stability
Good corrosion resistance
Excellent creep resistance
Outstanding thermal shock resistance
Excellent weldability
Good fabrication characteristics
Long service life with low maintenance
Stainless Steel 310 Specifications
| Specification | Details |
|---|---|
| Grade | Stainless Steel 310 |
| UNS Number | S31000 |
| Werkstoff Number | 1.4841 |
| EN Designation | X15CrNi25-20 |
| Stainless Steel Family | Austenitic Stainless Steel |
| Standards | ASTM A240, ASTM A276, ASTM A312, ASTM A182, EN 10088 |
| Product Forms | Sheet, Plate, Coil, Pipe, Tube, Round Bar, Flanges, Pipe Fittings |
| Surface Finish | No.1, 2B, BA, No.4, Mirror Finish |
| Supply Condition | Solution Annealed |
Equivalent Grades of Stainless Steel 310
| Standard | Equivalent Grade |
|---|---|
| ASTM | 310 |
| UNS | S31000 |
| EN | 1.4841 |
| DIN | X15CrNi25-20 |
| JIS | SUS310 |
| ISO | X15CrNi25-20 |
Available Sizes
Plates
Thickness: 5 mm to 100 mm
Width: 1000 mm to 2500 mm
Length: Up to 12000 mm
Sheets
Thickness: 0.5 mm to 6 mm
Width: Up to 2000 mm
Pipes & Tubes
Outside Diameter: 6 mm to 610 mm
Wall Thickness: 0.5 mm to 40 mm
Round Bars
Diameter: 6 mm to 500 mm
Stainless Steel 310 Chemical Composition
| Element | Composition (%) |
|---|---|
| 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 |
| Iron (Fe) | Balance |
Stainless Steel 310 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2% Offset) | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 217 HB |
| Modulus of Elasticity | 200 GPa |
Stainless Steel 310 Physical Properties
| Property | Value |
|---|---|
| Density | 7.90 g/cm³ |
| Melting Range | 1400 – 1450°C |
| Thermal Conductivity | 14.2 W/m·K |
| Electrical Resistivity | 0.78 µΩ·m |
| Specific Heat Capacity | 500 J/kg·K |
| Magnetic Permeability | Essentially Non-Magnetic (Annealed Condition) |
Types of 310 Stainless Steel Products
Corrosion Resistance
Stainless Steel 310 offers excellent resistance to:
- Atmospheric corrosion
- High-temperature oxidation
- Oxidizing gases
- Organic acids
- Industrial atmospheres
- Moderate carburizing and sulfidizing environments
Its high chromium and nickel content provides exceptional oxidation resistance at elevated temperatures. However, for marine or chloride-rich environments, Stainless Steel 316L or Duplex Stainless Steel is generally a more suitable choice.
Heat Resistance
Stainless Steel 310 is engineered for continuous operation in extremely high-temperature environments.
Service Temperature
- Continuous Service: Up to approximately 1100°C
- Intermittent Service: Up to approximately 1035°C
Benefits
- Outstanding oxidation resistance
- Excellent scaling resistance
- Superior thermal stability
- Good creep resistance
- Excellent resistance to thermal cycling
Heat Treatment
Solution Annealing
- Temperature: 1040°C – 1150°C
- Cooling: Rapid air cooling or water quenching
Benefits
- Restores corrosion resistance
- Improves ductility
- Relieves internal stresses
- Optimizes mechanical properties
Stainless Steel 310 cannot be hardened by heat treatment but can be strengthened through cold working.
Welding of Stainless Steel 310
Grade 310 offers excellent weldability using standard welding techniques.
Recommended Welding Methods
- GTAW (TIG)
- GMAW (MIG)
- SMAW (Shielded Metal Arc Welding)
- SAW (Submerged Arc Welding)
- Resistance Welding
Welding Advantages
- Excellent weld integrity
- No preheating normally required
- Good resistance to hot cracking
- Excellent high-temperature performance
Post-weld pickling and passivation are recommended to restore the protective oxide layer and maximize corrosion resistance.
Fabrication of Stainless Steel 310
Machining
- Turning
- Milling
- Drilling
- Threading
Forming
- Cold bending
- Roll forming
- Press forming
- Deep drawing
Cutting
- Laser cutting
- Plasma cutting
- Waterjet cutting
- Mechanical sawing
Surface Finishing
- Pickling
- Passivation
- Mechanical polishing
- Electropolishing
Applications of Stainless Steel 310
Furnace Industry
- Furnace linings
- Burner components
- Furnace conveyors
- Heat treatment baskets
Petrochemical Industry
- Reactors
- Process piping
- Heat exchangers
- Refinery equipment
Power Generation
- Boilers
- Superheaters
- Steam piping
- Waste heat recovery systems
Chemical Processing
- High-temperature vessels
- Storage tanks
- Processing equipment
Thermal Processing Industry
- Annealing furnaces
- Kilns
- Combustion chambers
- Incinerator components
Industrial Manufacturing
- High-temperature machinery
- Exhaust systems
- Heat-resistant structural components
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