304 / 304L Stainless Steel Bar
Stellanox Steel is a trusted supplier of premium 304 / 304L Stainless Steel Bars, known for their excellent corrosion resistance, outstanding formability, and versatility across multiple industries. These bars are ideal for structural applications, machining, and fabrication in industries like food processing, pharmaceuticals, construction, and marine equipment.
Available in various shapes—round, square, flat, and hex—304 / 304L bars deliver high performance in both standard and demanding environments.
What is 304 / 304L Stainless Steel Bar?
304 / 304L Stainless Steel Bar is an austenitic alloy composed primarily of chromium and nickel. It offers excellent corrosion resistance, high ductility, and weldability. The “L” in 304L indicates a lower carbon content, which helps prevent carbide precipitation during welding, making it ideal for applications involving frequent welding or corrosive atmospheres.
This stainless steel bar is offered in hot-rolled or cold-drawn finishes and a wide variety of sizes for construction, machining, and manufacturing needs.
| Products |
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Stainless Steel |
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Carbon Steel |
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Duplex Stainless Steel |
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Super Duplex Stainless Steel |
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Alloy Steel |
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Titanium |
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Hastelloy |
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Inconel |
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Monel |
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Aluminium |
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Copper |
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Pure Nickel |
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Flanges |
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Forged Fittings |
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Valves |
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Fasteners |
Key Features of 304 / 304L Stainless Steel Bar
- Corrosion Resistant: Performs well in atmospheric, freshwater, and food-grade environments.
- Weldable (304L): Low carbon content ensures resistance to weld decay.
- High Strength and Ductility: Suitable for forming and mechanical use.
- Non-Magnetic (Annealed): May become slightly magnetic when cold worked.
- Versatile Shapes: Available in round, hex, square, and flat bar types.
- Cost-Effective and Readily Available: One of the most widely used stainless steel grades.
Specification Chart – 304 / 304L Stainless Steel Bar
| Property | Details |
|---|---|
| Grade | 304 / 304L (UNS S30400 / S30403) |
| Standards | ASTM A276, ASTM A479, EN 10088-3 |
| Sizes Available | 3 mm to 300 mm (Round/Square/Hex/Flat) |
| Length | Up to 6 meters or cut-to-length |
| Finishes | Black, Bright, Polished, Peeled |
| Shapes | Round, Square, Hex, Flat |
Chemical Composition – 304 vs. 304L Stainless Steel Bar
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 12.0 |
| Carbon (C) | ≤ 0.08 (304), ≤ 0.03 (304L) |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Mechanical Properties – 304 / 304L Stainless Steel Bar
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 515 |
| Yield Strength (MPa) | ≥ 205 |
| Elongation (%) | ≥ 40 |
| Hardness (HRB) | ≤ 95 (Annealed) |
| Density | 8.00 g/cm³ |
Equivalent Grades
| Standard | Grade |
|---|---|
| ASTM | 304 / 304L |
| EN | 1.4301 / 1.4307 |
| JIS | SUS 304 / SUS 304L |
| UNS | S30400 / S30403 |
| DIN | X5CrNi18-10 / X2CrNi18-9 |
Applications of 304 / 304L Stainless Steel Bar
- Food Processing Equipment and Conveyors
- Structural Frames and Support Columns
- Architectural Railings and Brackets
- Machined Parts and Components
- Petrochemical and Pharmaceutical Equipment
- Marine and Coastal Structures
Benefits of 304 / 304L Stainless Steel Bar
- Excellent corrosion resistance in a wide range of environments
- Superior weldability and machinability
- Low maintenance and high durability
- Suitable for sanitary and decorative applications
- Easily fabricated and formed into custom parts
- Widely stocked and economical for large-scale use
Frequently Asked Questions
Explore our FAQs for insights on materials, customization, and delivery.
What's the difference between 304 and 304L bar?
304L contains less carbon, which improves weldability and reduces the risk of intergranular corrosion.
Is 304 / 304L bar magnetic?
It is generally non-magnetic in the annealed condition but may become slightly magnetic after cold working.
Can this bar be polished to a mirror finish?
Yes, it can be polished to various finishes including mirror, satin, and brushed.
Is it safe for food-grade and sanitary applications?
Absolutely. 304 / 304L is one of the most commonly used materials for food processing and medical environments.
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