Stainless Steel 304L Round Bar (UNS S30403)
Stainless Steel 304L Round Bar (UNS S30403) is a low-carbon variant of SS 304, specially designed to provide enhanced resistance to intergranular corrosion after welding. With reduced carbon content (max 0.03%), 304L round bars eliminate the risk of carbide precipitation, making them ideal for welded fabrications and corrosion-critical applications. UNS S30403 round bars offer excellent corrosion resistance, good mechanical strength, and superior formability for a wide range of industrial uses.
Key Features
- Low carbon content for improved weldability
- Excellent resistance to intergranular corrosion
- Good strength and toughness at cryogenic and elevated temperatures
- Superior formability and fabrication characteristics
- Non-magnetic in annealed condition
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | 304L |
| EN | 1.4307 |
| DIN | X2CrNi18-9 |
| JIS | SUS 304L |
| AFNOR | Z2CN18-09 |
Sizes
| Diameter Range | Length |
|---|---|
| 3 mm to 500 mm | 3 m, 6 m, or Custom Cut Lengths |
304L Round Bar Chemical Composition
| Element | Percentage (%) |
|---|---|
| Carbon (C) | ≤ 0.03 |
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 12.0 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
SS 304L Bar Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 485 MPa |
| Yield Strength (0.2% Proof) | ≥ 170 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 201 HB |
SS 304L Physical Properties
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1399 – 1454°C |
| Thermal Conductivity | 16.2 W/m·K |
| Electrical Resistivity | 0.72 µΩ·m |
| Modulus of Elasticity | 193 GPa |
Types of SS 304L Round Bar
- Hot Rolled Round Bar
- Cold Drawn Round Bar
- Bright Bar
- Forged Round Bar
- Polished / Centerless Ground Round Bar
Applications
- Welded structures and fabrications
- Chemical and petrochemical equipment
- Food processing and dairy industries
- Pharmaceutical and biotechnology plants
- Pressure vessels and heat exchangers
- Architectural and structural components
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