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Stainless Steel Pipe/Tube | Durable & Corrosion-Resistant
Stainless Steel Pipe/Tube | Durable & Corrosion-Resistant
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Stainless Steel Pipe/Tube Product Details
Specifications & Properties
| Parameter | Details |
|---|---|
| Material Grades | 304, 316L, 310S, 321, 201, 2205 (Duplex), 410, 430, 630 (17-4PH) |
| Size Range | stainless steel tube pipe sizes: Round (Ф6–630mm), Square (10×10–150×150mm), Rectangular (10×20–200×300mm) |
| Wall Thickness | 0.3–40mm (Cold Drawn: 0.3–8mm; Hot Rolled: 1.5–40mm) |
| Hardness (HV) | Austenitic: 150–200 HV |
| Surface Finish | 2B, BA, No.4, HL, Mirror, Annealed, Pickled, Satin (180G–800G) |
| Tolerance | ±0.01mm (Thickness) / ±0.2mm (Width/OD) |
| Processing Techniques | Cold/Hot Rolling, Precision Slitting, Seamless/Welded, Annealing |
Mechanical & Functional Properties
Tensile Strength
Stainless steel pipes exhibit tensile strengths ranging from 515–1035 MPa, depending on the grade and processing method. For example:
- Grade 304: 515–620 MPa (Annealed) / 860 MPa (Cold Worked) .
- Grade 316L: 485–620 MPa, ideal for chemical and marine environments .
- Duplex 2205: 620–750 MPa, combining high strength with chloride resistance .
Cold-drawn stainless steel tube pipe sizes achieve enhanced strength for high-pressure applications like oil/gas pipelines and boiler systems.
Bending Strength
Bending strength correlates with ductility and yield strength. Austenitic grades (e.g., 304) offer 205–310 MPa yield strength, enabling complex forming without cracking. This makes them suitable for humanized design stainless steel pipes and tubes in architectural structures and HVAC systems.
Identification & Marking
Stainless steel pipes are marked per international standards:
- ASTM/ASME: Laser-engraved grade (e.g., "316L"), heat number, and manufacturer’s logo.
- ISO/DIN: Material numbers (e.g., 1.4404 for 316L) and dimensional tolerances.
- Certifications: Mill Test Reports (MTRs) with chemical composition and mechanical data.
Weight Calculation
Weight (kg/m) = (OD – Wall Thickness) × Wall Thickness × 0.0248 (for austenitic grades).
Example: A stainless steel tube pipe size of Ф114.3mm × 6mm (Grade 304) weighs:
(114.3 – 6) × 6 × 0.0248 = 15.8 kg/m.
Why Does Stainless Steel Rust?
While stainless steel is corrosion-resistant, rust can occur under specific conditions:
- Chloride Exposure: Coastal or industrial environments degrade the chromium oxide layer, causing pitting.
- Mechanical Damage: Scratches from abrasive tools expose raw steel to oxidation.
- Low Chromium Content: Grades like 430 (<10.5% Cr) lack sufficient corrosion resistance.
- Galvanic Corrosion: Contact with carbon steel in electrolytes accelerates rusting.
- High-Temperature Oxidation: Prolonged exposure above 400°C destabilizes non-stabilized grades (e.g., 304 vs. 321) .
Easy to maintain stainless steel pipes and tubes require regular cleaning with pH-neutral solutions and avoiding chloride-based cleaners.
Why Choose Our Stainless Steel Pipes?
- Material Diversity: 20+ grades, including super duplex (2507), high-temperature (310S), and PH alloys (17-4PH).
- Precision Manufacturing: CNC-controlled cold drawing ensures ±0.01mm tolerance for aerospace and medical use.
- Global Certifications: ASTM A213, A312, EN 10216-5, and PED 2014/68/EU compliance.
- Custom Solutions: Tailored stainless steel tube pipe sizes, surface finishes (e.g., mirror for architectural use), and heat treatments.
- Quality Assurance: Third-party testing for hardness (Rockwell/Vickers), intergranular corrosion (ASTM A262), and hydrostatic pressure.
