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Technical Specifications
Product Overview
304 Stainless Steel Rectangular Tube is manufactured from premium grade 304 stainless steel using advanced forming and welding technology. This austenitic stainless steel rectangular tube offers excellent corrosion resistance, superior formability, and aesthetic appeal, making it ideal for structural, architectural, and decorative applications.
Key Features:
- Excellent corrosion resistance in various environments
- Superior formability and weldability
- Non-magnetic in annealed condition
- High strength-to-weight ratio
- Smooth interior and exterior finish
- FDA approved for food contact applications
Manufacturing Process: Cold formed from stainless steel strip and TIG/Laser welded using precision automatic welding technology, ensuring consistent dimensional accuracy and superior surface quality.
Applications: Architectural frameworks, handrails and balustrades, furniture manufacturing, food processing equipment, pharmaceutical equipment, decorative applications, structural supports, and general fabrication projects requiring rectangular hollow sections.
🧪 Chemical Composition
| Element | Min % | Max % | Typical % | ASTM A554 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 | 580 MPa | ASTM A370 | Room Temp |
| Yield Strength (0.2%) | 205 MPa min | 240 MPa | ASTM A370 | Room Temp |
| Elongation | 35% min | 45% | ASTM A370 | Room Temp |
| Hardness (Brinell) | 201 HB max | 170 HB | ASTM E10 | Room Temp |
| Hardness (Rockwell B) | 92 HRB max | 85 HRB | ASTM E18 | Room Temp |
| Modulus of Elasticity | - | 200 GPa | ASTM E111 | Room Temp |
| Impact Energy (Charpy V) | - | 300+ 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 |
|---|---|---|---|---|
| Width | 10mm - 200mm | Various | Yes | ±0.5mm |
| Height | 10mm - 150mm | Various | Yes | ±0.5mm |
| Wall Thickness | 0.8mm - 8mm | Various | Yes | ±10% |
| Length | 1m - 12m | 6m | Yes | +50mm/-0mm |
| Surface Finish | 2B, BA, No.4, HL, Mirror | 2B | Yes | Ra ≤ 0.4μm |
| Corner Radius | 1.5t - 3t | 2t | Yes | ±0.2mm |
| Weld Type | TIG, Laser | TIG | Both | ASME standard |
| Standards Compliance | ASTM A554, A269, JIS G3446 | A554 | Multiple | Full compliance |
| 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 Tubo Retangular de Aço Inoxidável 304
Superior Corrosion Resistance
The 304 grade stainless steel manufacturing process incorporates precise chromium and nickel content ratios, creating an inherent protective oxide layer that delivers exceptional resistance to rust and corrosion in various environmental conditions.
Precision Rectangular Forming
Advanced cold-forming and welding techniques ensure precise dimensional accuracy and consistent wall thickness in rectangular tube production, maintaining strict tolerances and structural integrity throughout the manufacturing process.
Versatile Welding Properties
The controlled manufacturing process of 304 stainless steel results in excellent weldability, allowing for clean, strong joints with minimal heat affected zones and reduced risk of carbide precipitation during fabrication.
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