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Rustproof 316/430 Stainless Steel Coil | Mirror Surface Precision
Rustproof 316/430 Stainless Steel Coil | Mirror Surface Precision
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Rustproof 316/430 Stainless Steel Coil | Mirror Surface Precision
Product Overview
Our rustproof 316/430 Stainless Steel Coil combines superior corrosion resistance with precision engineering, ideal for high-performance industrial and architectural applications. Designed for stainless steel coil heat exchanger for wood fired hot tub systems, marine equipment, and chemical processing, this product offers unmatched durability and aesthetic versatility. With a mirror surface finish, it ensures both functional excellence and visual appeal, meeting the rigorous demands of global stainless steel coil manufacturers and suppliers.
Technical Specifications
| Property | 316 Stainless Steel Coil | 430 Stainless Steel Coil |
|---|---|---|
| Thickness | 0.25–12mm (Cold Rolled: 0.25–3mm; Hot Rolled: 3–12mm) | 0.02–10mm (Cold Rolled: 0.02–3mm; Hot Rolled: 3–10mm) |
| Width | 1000–2000mm (Customizable Slit Edges) | 3.5–1550mm (Customizable) |
| Surface Finish | 2B, BA, No.4 (Matte), Mirror, HL (Hairline) | 2B, BA, Mirror, HL, No.4, 8K |
| Hardness (Rockwell B) | ≤95 HRB | ≤88 HRB |
| Tensile Strength | ≥485 MPa | ≥450 MPa |
| Yield Strength | ≥170 MPa | ≥205 MPa |
| Elongation (δ5) | ≥40% | ≥22% |
| Density | 7.98 g/cm³ | 7.7 g/cm³ |
| Melting Point | 1375–1400°C | 1427°C |
| Certifications | ASTM A240, ASME SA240, ISO 9444 | ASTM A240, JIS G4304, DIN 17441 |
Key Performance Attributes
Tensile & Bending Strength
The 316 stainless steel coil achieves a tensile strength of ≥485 MPa, making it ideal for structural components in marine and chemical environments. Its high ductility (≥40% elongation) allows seamless forming for stainless steel coil heat exchanger for wood fired hot tub systems, where resistance to thermal stress is critical.
The 430 stainless steel coil, with a tensile strength of ≥450 MPa, offers cost-effective durability for automotive trims and architectural cladding. Its lower elongation (≥22%) balances formability with rigidity.
Weight Calculation
Calculate coil weight using:
Weight (kg) = Thickness (mm) × Width (m) × Length (m) × Density (g/cm³)
- Example for 316 Coil: 2mm × 1.5m × 50m × 7.98 = 1,197 kg
- Example for 430 Coil: 1.5mm × 1.219m × 50m × 7.7 = 703.3 kg
Why Does Stainless Steel Rust?
While 316 and 430 grades are corrosion-resistant, rust can occur under specific conditions:
- Chloride Exposure: Coastal environments or de-icing salts degrade the chromium oxide layer, particularly in 430-grade coils.
- Mechanical Damage: Scratches during fabrication or stainless steel coil supplier handling expose raw metal to oxidation.
- Galvanic Corrosion: Contact with carbon steel or copper in electrolyte-rich environments accelerates corrosion.
- High-Temperature Oxidation: Prolonged exposure above 870°C (430-grade) or 400°C (316-grade) weakens the passive layer.
Identification & Traceability
All coils are laser-marked with:
- Grade: 316/316L or 430
- Batch Code: Linked to MTC (Mill Test Certificate) for full traceability.
- Surface Finish Symbol: e.g., 2B (Cold Rolled Matte), Mirror.
Applications
- Heat Exchangers: Stainless steel coil heat exchanger for wood fired hot tub systems, leveraging 316’s chloride resistance.
- Marine Equipment: Boat fittings, offshore platforms, and desalination plants.
- Architectural Cladding: Mirror-finished 430 coils for façades and interior design.
- Food Processing: 316-grade hygienic surfaces for conveyor belts and storage tanks.
Manufacturing Excellence
Surface Finishing Process
Our mirror surface precision is achieved through:
- Cold Rolling: Precision reduction for uniform thickness and smoothness.
- Bright Annealing (BA): Heat treatment in hydrogen-nitrogen atmospheres to eliminate oxidation.
- Electropolishing: Micro-imperfection removal for a reflective, corrosion-resistant surface.
Quality Assurance
- Material Sourcing: Sourced from TISCO/BAOSTEEL with ISO 9001 certification.
- Testing: Salt spray tests (1,000+ hours) and spectrometer analysis for alloy integrity.
Why Choose Our Stainless Steel Coils?
- Global Compliance: Dual ASTM/EN certifications for seamless cross-border projects.
- Customization: Slit-to-width (±0.1mm tolerance) and rewinding services for niche applications.
- Rapid Delivery: 7–15 days lead time with PVC-coated packaging to prevent scratches.
- Sustainability: 100% recyclable material with SGS-certified eco-friendly processes.
- Technical Support: 24/7 engineering guidance on fabrication, corrosion prevention, and load calculations.
