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3/8″ Stainless Steel Seamless Pipe 304
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Size: 3/8
Product Type: Stainless Steel Seamless Pipe
Grade: 304 Stainless Steel
UOM: FT
Product Overview
304 seamless stainless steel pipe is a chromium-nickel alloy celebrated for its 18% chromium and 8% nickel composition, providing outstanding resistance to oxidation, acids, and chlorides. Ideal for oil & gas, marine, food processing, and construction, our pipes combine affordability with premium quality, making them a top choice for global engineers and contractors.
Key Specifications & Technical Attributes
| Parameter | Details |
|---|---|
| Grade | 304 (AISI/SAE) / 304L (Low Carbon Version) |
| Outer Diameter (OD) | 1/2″ – 24″ (1.27mm – 609.6mm) |
| Wall Thickness (WT) | SCH 40S – SCH 160 (0.8mm – 12.7mm) |
| Length Options | Random Length (RL), Double-End Butt Welded (DEBW), or Customized Lengths |
| Surface Finish | Bright Annealed (BA), Polished, Hot Rolled (HR), or Sandblasted |
| Hardness | Brinell (HB 80–120) / Rockwell (HRC 18–20) |
| Standard Compliance | ASTM A53/A106, ASME B36.19, ISO 3183, GB/T 12771 |
| Corrosion Resistance | Passes 24-hour salt spray test (ASTM B117) |
Mechanical Properties & Performance
Tensile Strength
304 seamless stainless steel pipe demonstrates exceptional tensile strength, ensuring stability under extreme pressure. The minimum guaranteed tensile strength is 520 MPa (75 ksi) for standard 304 and 515 MPa (74 ksi) for low-carbon 304L variants. This makes it ideal for pipelines carrying high-pressure fluids in oil & gas and hydraulic systems.
Bending Strength
With a minimum bending strength of 345 MPa (50 ksi) for 304 and 310 MPa (45 ksi) for 304L, our pipes retain structural integrity during installation and long-term use. Perfect for architectural structures and mechanical components exposed to dynamic loads.
Impact Resistance
The alloy’s face-centered cubic (FCC) structure ensures superior toughness, even at cryogenic temperatures. Ideal for marine applications and cold-chain infrastructure operating below -50°C.
Weight Calculation Guide
Calculating the weight of stainless steel seamless pipe is essential for cost estimation and logistics planning. Use our simplified formula:
Weight (kg/m) = (OD – WT) × WT × 0.02466 / 1000
Example: For a pipe with OD = 6″ (152.4mm) and WT = 4mm:
(152.4 – 4) × 4 × 0.02466 / 1000 = 1.87 kg/m
Corrosion Prevention & Causes
While stainless steel seamless pipe 304 is inherently resistant to corrosion, specific conditions may compromise its durability:
Common Corrosion Triggers
- Chloride Exposure: Saltwater, deicing salts, and industrial chemicals accelerate pitting corrosion.
- Acidic Environments: pH levels < 4 degrade the passive chromium oxide layer.
- High Temperatures: Above 800°C, chromium carbide formation reduces corrosion resistance.
- Mechanical Damage: Scratches or weld defects expose bare metal to oxidation.
Proven Prevention Strategies
- Opt for 304L (low carbon) in corrosive environments to minimize carbide precipitation.
- Apply epoxy coatings or nitric acid passivation for additional protection.
- Regularly inspect pipes for signs of wear and clean using non-abrasive tools.
Identification & Certification
Verify the authenticity of stainless steel seamless pipe 304 through:
- Stamping: Look for “304” or “SUS304” on the pipe surface.
- Magnetic Test: Non-magnetic for standard 304; slightly magnetic for 304L.
- Spectroscopy: Lab analysis confirms chromium (18–20%) and nickel (8–10.5%) content.
Our pipes come with third-party certifications (SGS, TÜV, ISO 9001) for traceability and compliance.
Applications Across Industries
| Industry | Use Cases |
|---|---|
| Oil & Gas | Corrosion-resistant pipelines for crude oil transport and offshore drilling. |
| Marine | Seawater cooling systems, ship hull components, and tidal energy structures. |
| Food Processing | Hygienic tubing for dairy, beverage, and pharmaceutical production. |
| Construction | Structural supports, handrails, and roofing sheets. |
| Automotive | Exhaust systems, fuel lines, and chassis components. |
Why Choose Our Stainless Steel Seamless Pipe**?**
At [Your Company Name], we deliver unmatched value with:
✅ Premium Quality: ISO 9001-certified manufacturing and 100% material testing.
✅ Custom Solutions: Tailored dimensions, finishes, and certifications (e.g., 304 304L seamless stainless steel pipe).
✅ Competitive Pricing: Bulk order discounts up to 20% off the listed price.
✅ Global Delivery: Expedited shipping via DHL, FedEx, or sea freight.
✅ After-Sales Support: 24/7 technical assistance and warranty coverage.
Technical FAQs
Q: What’s the difference between 304 and 304L?
A: 304L contains lower carbon content (<0.03%), reducing carbide formation and enhancing weldability for critical applications.
Q: Can 304 stainless steel pipe rust?
A: While resistant, prolonged exposure to chlorides or acids may cause localized corrosion. Proper maintenance prevents rusting.
Q: What surface finish suits food-grade applications?
A: Bright Annealed (BA) or Polished finishes meet FDA standards for hygienic environments.
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