Stainless Steel 304 Round Bar (UNS S30400)
Stainless Steel 304 Round Bar (UNS S30400) is the most widely used austenitic stainless steel bar, known for its excellent corrosion resistance, good mechanical strength, and outstanding formability. Containing 18% chromium and 8% nickel, SS 304 round bars offer superior resistance to oxidation and many chemical environments, making them ideal for general-purpose industrial and commercial applications. Due to its versatility and cost-effectiveness, UNS S30400 round bar is extensively used across food processing, construction, automotive, and engineering industries.
Key Features
- Excellent corrosion and oxidation resistance
- Good strength and toughness at both low and high temperatures
- Superior formability and weldability
- Non-magnetic in annealed condition
- Hygienic surface, easy to clean and maintain
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | 304 |
| EN | 1.4301 |
| DIN | X5CrNi18-10 |
| JIS | SUS 304 |
| AFNOR | Z6CN18-09 |
Sizes
| Diameter Range | Length |
|---|---|
| 3 mm to 500 mm | 3 m, 6 m, or Custom Cut Lengths |
304 Round Bar Chemical Composition
| Element | Percentage (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 10.5 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Stainless Steel 304 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2% Proof) | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 201 HB |
SS 304 Bar Physical Properties
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1400 – 1450°C |
| Thermal Conductivity | 16.2 W/m·K |
| Electrical Resistivity | 0.72 µΩ·m |
| Modulus of Elasticity | 193 GPa |
Types of SS 304 Round Bar
- Hot Rolled Round Bar
- Cold Drawn Round Bar
- Bright Bar
- Forged Round Bar
- Polished / Centerless Ground Round Bar
Applications
- Food and beverage processing equipment
- Chemical and petrochemical industries
- Shafts, fasteners, and machined components
- Architectural and structural applications
- Heat exchangers and pressure vessels
- Automotive and marine hardware
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