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Technical Specifications
Product Overview
304 Stainless Steel Welded Pipe is manufactured from premium grade 304 stainless steel, offering excellent corrosion resistance and formability. This austenitic stainless steel pipe is ideal for general purpose applications including food processing, chemical processing, and architectural projects.
Key Features:
- Excellent corrosion resistance in mild environments
- Good formability and weldability
- Non-magnetic in annealed condition
- FDA approved for food contact applications
- Cost-effective solution for general applications
Manufacturing Process: TIG/MIG welded using advanced automatic welding technology, ensuring consistent quality and smooth interior finish.
Applications: Food & beverage processing, pharmaceutical equipment, chemical processing, architectural applications, decorative applications, and general industrial piping systems.
🧪 Chemical Composition
| Element | Min % | Max % | Typical % | ASTM A312 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 - 630mm | Various | Yes | ±0.5mm |
| Wall Thickness | 0.5mm - 25mm | Various | Yes | ±10% |
| Length | 1m - 12m | 6m | Yes | +50mm/-0mm |
| Surface Finish | 2B, BA, No.4, HL | 2B | Yes | Ra ≤ 0.4μm |
| Weld Type | TIG, MIG | TIG | Both | ASME standard |
| End Connection | Plain, Beveled, Threaded | Plain | Yes | ASME B36.19 |
| Standards Compliance | ASTM A312, A269, A270 | A312 | Multiple | Full compliance |
| Pressure Rating | Schedule 5S - 80S | Schedule 10S | Yes | ASME B31.3 |
| Test Certificate | Mill TC, EN 10204 3.1 | Mill TC | Yes | Standard |
| Packaging | Bundles, Crates, Containers | Bundles | Custom | Export standard |
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Our Advantages in Processing ท่อเหล็กกล้าไร้สนิม 304 เชื่อม
Precision Welding Technology
Advanced automated welding processes ensure consistent seam quality and structural integrity throughout the pipe length. Computer-controlled welding parameters maintain precise temperature and speed control, resulting in superior joint strength and reliability.
304 Grade Quality Control
Rigorous material testing and certification processes guarantee the authentic 304 grade composition, ensuring optimal chromium-nickel content for maximum corrosion resistance and mechanical properties throughout the manufacturing process.
Uniform Wall Thickness
State-of-the-art rolling and forming equipment maintains exact dimensional tolerances during the welding process, ensuring consistent wall thickness and roundness for optimal flow characteristics and structural performance.
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