Corrosion-Resistant 304/316 Stainless Steel Coil | Polished Perfection

Technical Specifications

Engineered for industrial durability and aesthetic precision

Key Properties & Performance

1. Tensile & Bend Strength

Our stainless steel tubing coils exhibit exceptional tensile strength (515–720 MPa for 304 and 485–620 MPa for 316), ensuring structural integrity under high-pressure conditions. The cold-rolled process enhances ductility, allowing bends up to 180° without cracking. This makes 304 ideal for 2 inch stainless steel coil tubing in hydraulic systems, while 316’s molybdenum content (2–3%) ensures superior resistance to chloride-induced stress corrosion cracking.

2. Corrosion Resistance

• 304 Stainless Steel: Contains 18% chromium and 8% nickel, forming a passive oxide layer for resistance to organic acids and atmospheric corrosion. Suitable for indoor applications like kitchen equipment and architectural trim.
• 316 Stainless Steel: Enhanced with molybdenum, it resists pitting in chloride-rich environments (e.g., coastal areas, chemical plants). Ideal for stainless steel coil roofing nails and marine hardware.

3. Weight Calculation

Use the formula for precise logistics planning:
$\text{Weight (kg/m)}=\text{Thickness (mm)}\times \text{Width (m)}\times \text{Length (m)}\times 7.93(\text{Density for 304})\text{or}7.98(\text{Density for 316})$
Example: A 2mm x 1219mm x 1000mm 304 coil ≈ 19.4 kg.

4. Identification & Traceability

• Laser Marking: ASTM/EN grade, heat number, and mill code for full traceability.
• Certification: ISO 9001, RoHS, and third-party chemical analysis reports (XRF) included with shipments.

Why Stainless Steel Rusts?

Understanding material limitations ensures longevity
Even premium grades can corrode under specific conditions:

1. Chloride Exposure: Coastal or de-icing salt environments degrade the passive oxide layer, causing pitting in 304.
2. Galvanic Corrosion: Contact with carbon steel or copper in humid settings accelerates electrochemical degradation.
3. Mechanical Damage: Scratches from improper tools (e.g., carbon steel brushes) expose raw metal to oxidation.
4. High-Temperature Oxidation: Prolonged use above 870°C depletes chromium content in 316, reducing corrosion resistance.

Prevention Strategies:

• Use 316 for coastal or chemical-heavy applications.
• Apply passivation treatments (nitric acid baths) post-fabrication.
• Avoid abrasive cleaners; opt for pH-neutral solutions.

Applications

Our coils excel in critical industries:

• Construction: Stainless steel coil roofing nails for coastal buildings and corrosion-resistant cladding.
• Oil & Gas: 2 inch stainless steel coil tubing for hydraulic systems and offshore platforms.
• Food Processing: Hygienic stainless steel tubing coils for CIP/SIP-compliant pipelines.
• Architecture: Mirror-finished elevator panels and decorative façades.

Why Choose Us?

1. Certified Quality Assurance

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

2. Custom Solutions

   • Tailored widths (10–2000mm), thicknesses (0.03–6mm), and surface finishes (No.4 to Mirror).
   • Precision slitting for stainless steel tubing coils with ±0.1mm tolerance.

3. Global Logistics Network

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

4. Lifetime Technical Support

   • Free metallurgical consulting on weldability (TIG/MIG for 304; laser welding for 316).
   • On-site corrosion audits for critical installations.