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Technical Specifications
Product Overview
304 Stainless Steel Welded Round Tube is manufactured from high-quality 304 stainless steel using precision welding technology. This austenitic stainless steel tube offers excellent corrosion resistance, superior formability, and outstanding surface finish, making it ideal for structural, decorative, and industrial applications.
Key Features:
- Excellent corrosion resistance in various environments
- Superior formability and weldability
- Non-magnetic in annealed condition
- Smooth interior and exterior finish
- FDA approved for food contact applications
- Cost-effective solution for structural applications
Manufacturing Process: Precision TIG/Laser welded using advanced automatic welding technology with post-weld heat treatment, ensuring consistent quality, smooth weld seam, and excellent dimensional accuracy.
Applications: Architectural and structural applications, handrails and balustrades, food processing equipment, pharmaceutical equipment, decorative applications, furniture manufacturing, automotive exhaust systems, and general fabrication projects.
🧪 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 |
|---|---|---|---|---|
| Outside Diameter (OD) | 6mm - 219mm | Various | Yes | ±0.5mm |
| Wall Thickness | 0.5mm - 8mm | Various | Yes | ±10% |
| Length | 1m - 12m | 6m | Yes | +50mm/-0mm |
| Surface Finish | 2B, BA, No.4, HL, Mirror | 2B | Yes | Ra ≤ 0.4μm |
| Weld Type | TIG, Laser | TIG | Both | ASME standard |
| End Condition | Plain, Beveled, Deburred | Plain | Yes | ASTM A554 |
| Standards Compliance | ASTM A554, A269, JIS G3463 | A554 | Multiple | Full compliance |
| Shape Tolerance | Round, Square, Rectangular | Round | Yes | ±1% OD |
| Test Certificate | Mill TC, EN 10204 3.1 | Mill TC | Yes | Standard |
| Packaging | Bundles, Wooden Cases | Bundles | Custom | Export standard |
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Our Advantages in Processing ท่อกลมสแตนเลส 304 ชนิดเชื่อม
Precision Welding Technology
Advanced automated welding processes ensure consistent seam quality throughout the tube length, resulting in superior structural integrity and leak-proof performance. Each weld undergoes rigorous quality control testing to maintain optimal joint strength.
Superior Grade Steel Formation
304 stainless steel material undergoes specialized forming and rolling processes to achieve precise roundness and dimensional accuracy. The controlled manufacturing environment ensures uniform wall thickness and surface finish.
Enhanced Surface Treatment
Post-weld heat treatment and surface finishing processes eliminate stress points and ensure maximum corrosion resistance. The standardized treatment protocol guarantees consistent material properties and extended service life.
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