Stainless Steel 316L Round Bar (UNS S31603)
Stainless Steel 316L Round Bar (UNS S31603) is a low-carbon, molybdenum-bearing austenitic stainless steel designed for enhanced corrosion resistance and excellent weldability. The reduced carbon content minimizes the risk of intergranular corrosion after welding, while molybdenum improves resistance to pitting and crevice corrosion in chloride and aggressive chemical environments. UNS S31603 round bars are widely used in marine, chemical processing, pharmaceutical, and food-grade applications requiring long-term durability.
Key Features
- Low carbon content for superior weldability
- Excellent resistance to pitting and crevice corrosion
- Enhanced performance in marine and chloride environments
- Good strength and toughness at elevated and cryogenic temperatures
- Non-magnetic in annealed condition
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | 316L |
| EN | 1.4404 |
| DIN | X2CrNiMo17-12-2 |
| JIS | SUS 316L |
| AFNOR | Z2CND17-11-02 |
Sizes
| Diameter Range | Length |
|---|---|
| 3 mm to 500 mm | 3 m, 6 m, or Custom Cut Lengths |
316L Round Bar Chemical Composition
| Element | Percentage (%) |
|---|---|
| Carbon (C) | ≤ 0.03 |
| Chromium (Cr) | 16.0 – 18.0 |
| Nickel (Ni) | 10.0 – 14.0 |
| Molybdenum (Mo) | 2.0 – 3.0 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
316L SS Round Bar Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 485 MPa |
| Yield Strength (0.2% Proof) | ≥ 170 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 217 HB |
SS 316L Physical Properties
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1375 – 1400°C |
| Thermal Conductivity | 16.3 W/m·K |
| Electrical Resistivity | 0.74 µΩ·m |
| Modulus of Elasticity | 193 GPa |
Types of SS 316L Round Bar
- Hot Rolled Round Bar
- Cold Drawn Round Bar
- Bright Bar
- Forged Round Bar
- Centerless Ground / Polished Round Bar
Applications
- Marine and offshore equipment
- Chemical and petrochemical processing plants
- Pharmaceutical and biotechnology industries
- Food processing and dairy equipment
- Heat exchangers and pressure vessels
- Valves, pumps, and fasteners
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