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1 1/8″ Stainless Steel Welded Tube 304
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Size: 1 1/8
Product Type: Stainless Steel Welded Tube
Grade: 304 Stainless Steel
UOM: FT
Product Overview
304 stainless steel welded tubes are a cornerstone of modern engineering, offering a balance of corrosion resistance, strength, and affordability. Ideal for structural frameworks, plumbing, and HVAC systems, these reliable stainless steel welded tubes comply with ASTM A312, ASTM A554, and EN 10217-7 standards, ensuring global compatibility and performance.
Technical Specifications
The table below highlights key dimensions, mechanical properties, and manufacturing details:
| Parameter | Standard Sizes | Wall Thickness | Hardness (HV) | Surface Finish | Manufacturing Process |
|---|---|---|---|---|---|
| Outer Diameter (OD) | 10mm – 200mm | 0.5mm – 12mm | 150–200 | Mill Finish (2B) | TIG Welding & Annealed |
| Tolerance | ±0.1mm (OD) | ±0.08mm | – | Polished (Mirror) | Seamless Conversion (Custom) |
| Length | 2m – 6m | – | – | Brushed (No. 4) | Cold Rolled & Solution-Treated |
| Customization Options | Up to 300mm OD | Up to 15mm | – | Bead Blasted | Laser Welded for Precision |
In-Depth Technical Explanations
1. Tensile Strength & Bending Performance
304 stainless steel welded tubes deliver a tensile strength range of 520–620 MPa, making them suitable for load-bearing applications like building frameworks, conveyor systems, and automotive exhausts. This metric defines the maximum stress the material can endure before fracture under tension.
Bending strength, measured at 350–500 MPa, ensures resistance to deformation under lateral forces. This property is critical for components like handrails, support beams, and machinery parts, where shape retention under stress is essential.
2. Material Identification & Certification
Authentic 304 stainless steel welded tubes are verified through:
- Grade Markings: Laser-etched “304” or “AISI 304” near tube ends.
- Chemical Composition: 18–20% chromium, 8–10.5% nickel, and ≤0.08% carbon for optimal corrosion resistance.
- Certification Documents: Mill Test Certificates (MTCs) validating compliance with ASTM/EN standards and third-party lab reports.
XRF (X-ray fluorescence) testing and PMI (Positive Material Identification) ensure material authenticity and traceability.
3. Weight Calculation Guidelines
The weight of a stainless steel welded tube depends on its outer diameter, wall thickness, and length. For example:
- A 25mm OD tube with a 2mm wall thickness weighs approximately 1.5 kg/m, ideal for lightweight architectural designs.
- Thicker walls (e.g., 6mm) increase weight to 4.2 kg/m, suitable for industrial piping and structural columns.
Contact our team for precise weight estimates tailored to your project requirements.
4. Corrosion Resistance & Causes of Rust
While 304 stainless steel welded tubes resist oxidation in most environments, rust may develop under extreme conditions:
- Chloride Exposure: Coastal areas or de-icing salts can cause pitting corrosion over time.
- High Humidity: Prolonged moisture exposure without proper ventilation may lead to surface oxidation.
- Mechanical Damage: Scratches or improper handling can compromise the protective chromium oxide layer.
Preventative Measures:
- Regular cleaning with mild detergents to remove contaminants.
- Application of protective coatings (e.g., zinc-rich paint) in aggressive environments.
- Avoid contact with carbon steel tools to prevent galvanic corrosion.
Industrial Applications
304 stainless steel welded tubes are indispensable across industries:
- Construction: Structural supports, roofing systems, and escalator frameworks.
- Food & Beverage: Sanitary piping, brewing tanks, and refrigeration units.
- Automotive: Exhaust systems, fuel lines, and chassis components.
- Chemical Processing: Ventilation ducts, solvent storage, and mild acid handling.
Quality Assurance & Testing Protocols
Our reliable stainless steel welded tubes undergo rigorous inspections, including:
- Hydrostatic Testing: Tubes are pressurized to 1.5x their rated capacity to ensure leak-proof integrity.
- Ultrasonic Testing: Detects internal flaws or weld inconsistencies.
- Hardness Testing: Verifies material consistency across batches.
- Dimensional Checks: Laser-guided tools ensure precise OD, wall thickness, and roundness.
Customization & Value-Added Services
- Cut-to-Length: Precision cutting for seamless on-site installation.
- Surface Treatments: Electropolishing for hygienic applications or anti-glare finishes for architectural use.
- Certification Packages: Custom documentation for FDA, NSF, or ISO compliance.
- Packaging: PVC-wrapped bundles or wooden crates for international shipping.
Why Choose Our 304 Stainless Steel Welded Tubes?
- Superior Material Integrity: Sourced from ISO-certified mills with full traceability.
- Cost-Effective Solutions: Competitive pricing with bulk order discounts.
- Rapid Production: 80% of standard orders ship within 48 hours.
- Global Logistics: Doorstep delivery via air, sea, or land freight.
- Technical Support: 24/7 engineering assistance for design optimization.
Frequently Asked Questions (FAQs)
Q: Can 304 stainless steel welded tubes handle high-temperature applications?
A: Yes, they perform reliably up to 870°C (1600°F) in intermittent service.
Q: How does 304 compare to 316 stainless steel?
A: 304 is cost-effective for general use, while 316 offers enhanced chloride resistance due to molybdenum content.
Q: Do you provide samples?
A: Yes, free samples are available for material verification.
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