304 Stainless Steel Square Bar
Stellanox Steel offers premium-grade 304 Stainless Steel Square Bars, widely used across structural, fabrication, and machining applications due to their excellent corrosion resistance, strength, and versatility. These square bars are ideal for frames, supports, braces, and architectural applications where durability and a clean finish are required.
Available in various dimensions and finishes, 304 square bars deliver reliable performance in both indoor and outdoor environments.
What is 304 Stainless Steel Square Bar?
304 Stainless Steel Square Bar is a solid square-shaped bar made from austenitic stainless steel alloy with 18–20% chromium and 8–10.5% nickel. It offers excellent resistance to corrosion, high ductility, and good machinability. As one of the most widely used stainless steel grades, 304 is suitable for general-purpose use in structural, architectural, and marine industries.
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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 Stainless Steel Square Bar
- Corrosion Resistant: Performs well in oxidizing and atmospheric environments.
- Good Weldability and Machinability: Suitable for fabrication and CNC processing.
- Non-Magnetic (Annealed): Slightly magnetic when cold worked.
- Smooth Surface Finish: Ideal for exposed or decorative applications.
- Excellent Strength and Ductility: Retains structural integrity under load.
- Versatile for Multiple Uses: Preferred in structural and sanitary projects.
Specification Chart – 304 Stainless Steel Square Bar
| Property | Details |
|---|---|
| Grade | 304 (UNS S30400) |
| Standards | ASTM A276, ASTM A479, EN 10088-3 |
| Size Range | 6 mm – 100 mm |
| Length | Up to 6 meters or cut to length |
| Finish | Bright, Polished, Hot Rolled, Cold Drawn |
| Tolerances | h11, h12 (as required) |
Chemical Composition – 304 Stainless Steel Square Bar
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 18.0 – 20.0 |
| Nickel (Ni) | 8.0 – 10.5 |
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Mechanical Properties – 304 Stainless Steel Square Bar
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 515 |
| Yield Strength (MPa) | ≥ 205 |
| Elongation (%) | ≥ 40 |
| Hardness (HRB) | ≤ 95 (Annealed) |
| Density | 8.00 g/cm³ |
Equivalent Grades – 304 Stainless Steel Square Bar
| Standard | Grade |
|---|---|
| ASTM | 304 |
| EN | 1.4301 |
| JIS | SUS 304 |
| UNS | S30400 |
| DIN | X5CrNi18-10 |
Applications of 304 Stainless Steel Square Bar
- Structural Frameworks and Supports
- Marine and Coastal Architecture
- Food and Beverage Equipment
- Furniture and Decorative Hardware
- Brackets, Shafts, and Hinges
- CNC Machined Components
Benefits of 304 Stainless Steel Square Bar
- Corrosion resistant and weatherproof
- High machinability and weldability
- Cost-effective for general-purpose use
- Long service life with low maintenance
- Smooth surface for exposed applications
- Available in a wide range of sizes and finishes
Frequently Asked Questions
Explore our FAQs for insights on materials, customization, and delivery.
Is 304 stainless steel square bar magnetic?
It is non-magnetic in the annealed state, but cold working may introduce slight magnetism.
Can this be used outdoors?
Yes, 304 performs well in outdoor and moderately corrosive environments.
Is 304 suitable for food and sanitary environments?
Absolutely. 304 is widely used in food-grade and cleanroom applications.
What is the difference between 304 and 304L?
304L has lower carbon content and is better for welded applications, reducing the risk of corrosion at the welds.
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