310 Stainless Steel Round Bar (UNS S31000)
310 Stainless Steel Round Bar (UNS S31000) is a high-alloy austenitic stainless steel known for its exceptional oxidation resistance and strength at elevated temperatures. With very high chromium and nickel content, 310 round bars are specifically designed for continuous service in high-temperature and corrosive environments, making them ideal for furnace, heat-treatment, and thermal processing applications.
Key Features
- Outstanding oxidation and scaling resistance up to very high temperatures
- High chromium (24–26%) and nickel (19–22%) content
- Excellent strength retention under continuous high-temperature exposure
- Superior resistance to carburization and sulfidation
- Good weldability and fabrication characteristics
- Non-magnetic in annealed condition
Specification
| Parameter | Details |
|---|---|
| Product Form | Round Bar |
| Grade | Stainless Steel 310 |
| UNS Number | S31000 |
| Standards | ASTM A276, ASTM A479, ASME SA276, SA479 |
| Condition | Annealed / Hot Rolled / Cold Drawn |
| Surface Finish | Black, Bright, Polished, Turned |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM / ASME | 310 |
| UNS | S31000 |
| EN | 1.4841 |
| DIN | X15CrNiSi25-21 |
| JIS | SUS 310 |
Sizes
| Diameter Range | Length |
|---|---|
| 3 mm – 500 mm | Random / Cut Length / Up to 6 meters |
| Custom Sizes | Available on request |
310 Stainless Steel Chemical Composition
| Element | Percentage (%) |
|---|---|
| Carbon (C) | ≤ 0.25 |
| Chromium (Cr) | 24.00 – 26.00 |
| Nickel (Ni) | 19.00 – 22.00 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.50 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
310 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2% Offset) | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 217 HB |
UNS S31000 Physical Properties
| Property | Value |
|---|---|
| Density | 7.9 g/cm³ |
| Melting Range | 1400 – 1455°C |
| Thermal Conductivity | 14.2 W/m·K |
| Electrical Resistivity | 0.78 µΩ·m |
| Modulus of Elasticity | 193 GPa |
Types of 310 Stainless Steel Round Bar
- Hot Rolled Round Bar
- Cold Drawn Round Bar
- Bright Bar
- Polished Stainless Steel Round Bar
- Forged Round Bar
Applications
- Furnace parts and heat-treatment equipment
- Kilns, burners, and combustion chambers
- Petrochemical and refinery components
- Heat exchangers and boiler parts
- Power generation and thermal processing units
- High-temperature structural and pressure components
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