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Technical Specifications
Product Overview
304 Stainless Steel Square Tube is manufactured from premium grade 304 stainless steel, providing excellent corrosion resistance and structural integrity. This austenitic stainless steel square tube offers superior strength-to-weight ratio and is ideal for architectural, structural, and decorative applications.
Key Features:
- Excellent corrosion resistance in various environments
- Superior structural strength and dimensional stability
- Non-magnetic in annealed condition
- Excellent weldability and formability
- Smooth interior and exterior surfaces
- Cost-effective solution for structural applications
Manufacturing Process: Formed from high-quality 304 stainless steel strip through precision roll forming and welding processes, ensuring consistent dimensional accuracy and superior surface finish.
Applications: Architectural frameworks, structural supports, handrails and balustrades, furniture manufacturing, decorative applications, machine frames, and general construction projects requiring corrosion resistance and aesthetic appeal.
🧪 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 |
|---|---|---|---|---|
| Square Size | 10mm ?á 10mm - 200mm ?á 200mm | Various | Yes | ±0.5mm |
| Wall Thickness | 0.8mm - 8mm | Various | Yes | ±10% |
| Length | 1m - 12m | 6m | Yes | +50mm/-0mm |
| Surface Finish | Mill Finish, Polished, Brushed | Mill Finish | Yes | Ra ≤ 0.6μm |
| Manufacturing Method | Welded, Seamless | Welded | Both | ASTM standard |
| Corner Radius | 1.5t - 3.0t | 2.0t | Yes | ±0.2mm |
| Standards Compliance | ASTM A554, A269, JIS G3446 | A554 | Multiple | Full compliance |
| Straightness | ≤ 2mm/m | 1.5mm/m | Yes | ASTM A554 |
| 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 304 Stainless Steel Square Tube
Superior Corrosion Resistance
The 304 grade stainless steel composition features optimal chromium and nickel content, manufactured through a precise alloying process that creates an invisible protective chromium oxide layer, ensuring exceptional resistance to rust and corrosion in various environments.
Precision Square Formation
Advanced cold-forming and welding techniques ensure perfect square geometry and dimensional accuracy. The manufacturing process maintains consistent wall thickness and sharp corners, resulting in superior structural integrity and aesthetic appearance.
High-Quality Surface Finish
Specialized polishing and surface treatment processes create a smooth, uniform finish that not only enhances aesthetic appeal but also improves resistance to contamination and makes cleaning easier, ideal for both industrial and decorative applications.
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