High-Performance 316L Stainless Steel Coil | Cold Rolled Excellence

Technical Specifications

Engineered for demanding industrial and architectural applications

Key Properties & Applications

1. Tensile & Bend Strength

Our stainless steel pipe coil combines high tensile strength (485–620 MPa) with exceptional ductility, enabling deep drawing and tight-radius bending (up to 180°) without cracking. The low carbon content (<0.03%) minimizes carbide precipitation during welding, making it ideal for stainless steel tube coil systems in corrosive environments like chemical processing and offshore platforms.

2. Corrosion Resistance

The molybdenum-enhanced (2–3%) chromium-nickel matrix provides:

• Pitting Resistance Equivalent Number (PREN): 28–32
• Superior resistance to chlorides, sulfuric acid (up to 15% concentration), and marine atmospheres
• Immune to sensitization in welded zones (critical for stainless steel coil tubing heat exchanger components)

3. Weight Calculation

Use the formula for precise logistics planning:
$\text{Weight (kg/m)}=\text{Thickness (mm)}\times \text{Width (m)}\times 7.98(\text{Density})$
Example: A 2mm x 1219mm coil weighs ≈19.47 kg per meter.

4. Identification & Certification

• Laser Marking: ASTM/EN grade, heat number, and mill code for full traceability
• Certificates: ISO 9001, TUV, and third-party chemical analysis reports (XRF)

Why Stainless Steel Rusts?

Proactive maintenance insights for extended service life
Despite its "stainless" designation, 316L can corrode under extreme conditions:

1. Chloride Stress Corrosion Cracking (CSCC): Prolonged exposure to >50 ppm chlorides (e.g., coastal areas, de-icing salts) breaches the passive oxide layer.
2. Galvanic Coupling: Direct contact with carbon steel or copper accelerates electrochemical degradation.
3. High-Temperature Oxidation: Sustained use above 870°C (1600°F) depletes chromium content, reducing oxidation resistance.
4. Mechanical Abrasion: Scratches from improper handling tools (e.g., carbon steel wire brushes) expose raw metal to oxygen.

Prevention Strategies:

• Specify 316L over 316 for welded assemblies.
• Apply passivation treatments post-fabrication (nitric acid or citric acid baths).
• Use non-chlorinated cleaners for routine maintenance.

Applications

Our coils are trusted in mission-critical systems worldwide:

• Energy: Offshore oil rig piping, nuclear reactor coolant stainless steel pipe coil networks.
• Food & Pharma: Hygienic stainless steel tube coil for CIP/SIP-compliant processing lines.
• Architecture: Mirror-finished elevator panels and coastal building cladding.
• HVAC: Corrosion-resistant stainless steel coil tubing heat exchanger cores for seawater cooling.

Why Choose Us?

1. Certified Quality Assurance

   • ISO 9001, PED 2014/68/EU, and NORSOK M650-approved production.
   • Batch-tested for intergranular corrosion (ASTM A262 Practice E).

2. Customization Flexibility

   • Precision slit edges (±0.1mm tolerance) for stainless steel tube coil uniformity.
   • Custom annealing cycles (bright/soft) to optimize hardness (160–250 HV).

3. Global Logistics Network

   • 30,000-ton annual capacity with 15-day lead time.
   • Seaworthy packaging (VCI-coated steel straps + desiccant).

4. Lifetime Technical Support

   • Free weld procedure specifications (TIG/MIG/Laser).
   • On-site corrosion audit services for critical installations.