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Technical Specifications
Product Overview
304 Stainless Steel Square Bar is manufactured from premium grade 304 austenitic stainless steel, providing excellent corrosion resistance, formability, and machinability. These square bars are precision manufactured to meet strict dimensional tolerances and surface finish requirements for various industrial applications.
Key Features:
- Excellent corrosion resistance in mild to moderate environments
- Superior machinability and formability
- Non-magnetic in annealed condition
- FDA approved for food contact applications
- Precise dimensional accuracy and surface finish
Manufacturing Process: Cold drawn or hot rolled process with precision grinding and polishing to achieve required dimensional tolerances and surface finish. Available in annealed or cold worked conditions.
Applications: Machining components, fasteners, shafts, structural applications, food processing equipment, pharmaceutical equipment, marine hardware, architectural trim, and general fabrication projects requiring precise square cross-sections.
🧪 Chemical Composition
| Element | Min % | Max % | Typical % | ASTM A276 Requirement |
|---|---|---|---|---|
| Carbon (C) | - | 0.080 | 0.045 | ≤ 0.08 |
| Chromium (Cr) | 18.0 | 20.0 | 18.5 | 18.0-20.0 |
| Nickel (Ni) | 8.0 | 12.0 | 9.2 | 8.0-12.0 |
| Manganese (Mn) | - | 2.00 | 1.45 | ≤ 2.00 |
| Silicon (Si) | - | 0.75 | 0.42 | ≤ 0.75 |
| Phosphorus (P) | - | 0.045 | 0.028 | ≤ 0.045 |
| Sulfur (S) | - | 0.030 | 0.015 | ≤ 0.030 |
| Nitrogen (N) | - | 0.10 | 0.06 | ≤ 0.10 |
| Iron (Fe) | Balance | Balance | 70.1 | Balance |
⚙️ Mechanical Properties
| Property | ASTM Requirement | Typical Value | Test Method | Temperature |
|---|---|---|---|---|
| Tensile Strength | 515 MPa min | 620 MPa | ASTM A370 | Room Temp |
| Yield Strength (0.2%) | 205 MPa min | 290 MPa | ASTM A370 | Room Temp |
| Elongation | 40% min | 50% | ASTM A370 | Room Temp |
| Hardness (Brinell) | 201 HB max | 180 HB | ASTM E10 | Room Temp |
| Hardness (Rockwell B) | 92 HRB max | 88 HRB | ASTM E18 | Room Temp |
| Modulus of Elasticity | - | 200 GPa | ASTM E111 | Room Temp |
| Impact Energy (Charpy V) | - | 325+ J | ASTM E23 | Room Temp |
🔬 Physical Properties
| Property | Value | Unit | Temperature | Test Standard |
|---|---|---|---|---|
| Density | 8.00 | g/cm3 | 20°C | ASTM B311 |
| Melting Point | 1400-1450 | °C | - | DSC Analysis |
| Thermal Conductivity | 16.2 | W/m·K | 100°C | ASTM E1461 |
| Specific Heat | 500 | J/kg·K | 0-100°C | ASTM C351 |
| Linear Expansion | 17.2 | μm/m·K | 0-100°C | ASTM E228 |
| Electrical Resistivity | 720 | n|°¤m | 20°C | ASTM B193 |
| Magnetic Permeability | 1.02 | μ/μ₀ | Room Temp | ASTM A342 |
| Curie Temperature | None | - | - | Non-magnetic |
📏 Product Specifications
| Specification | Available Range | Standard Length | Custom Available | Tolerance |
|---|---|---|---|---|
| Square Size | 3mm - 200mm | Various | Yes | ±0.5mm |
| Length | 1m - 12m | 6m | Yes | +50mm/-0mm |
| Surface Finish | Hot Rolled, Cold Drawn, Bright | Cold Drawn | Yes | Ra ≤ 0.8μm |
| Corner Radius | Sharp, R1-R5 | Sharp | Yes | ±0.2mm |
| Straightness | ≤ 2mm/m | Standard | Precision | ASTM A276 |
| Cross Section | Square | Square | No | 90° ±1° |
| Standards Compliance | ASTM A276, A479, A582 | A276 | Multiple | Full compliance |
| Condition | Annealed, Cold Worked | Annealed | Both | ASTM standard |
| Test Certificate | Mill TC, EN 10204 3.1 | Mill TC | Yes | Standard |
| Packaging | Bundles, Wooden Crates | Bundles | Custom | Export standard |
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Our Advantages in Processing Barra Quadrada de Aço Inoxidável 304
Superior Corrosion Resistance
The 304 grade stainless steel composition ensures exceptional resistance to rust and corrosion through precise metallurgical control during manufacturing, making it ideal for long-term exposure to harsh environments and chemical applications.
Precise Square Profile Formation
Advanced hot rolling and cold drawing processes create perfectly square corners and consistent dimensions throughout the bar length, ensuring optimal structural integrity and clean aesthetic appearance for architectural applications.
Enhanced Surface Finishing
Specialized surface treatment during the manufacturing process delivers a smooth, uniform finish with excellent polish retention capabilities, minimizing maintenance requirements while maintaining professional appearance over time.
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