High-Strength Stainless Steel Coil – Cold Rolled 430

High-Strength Stainless Steel Coil – Cold Rolled 430

Overview

Cold Rolled Grade 430 Stainless Steel Coil is a ferritic, chromium-dominated (16–18%) alloy optimized for high strength-to-weight ratios and exceptional corrosion resistance in mildly corrosive environments. Its magnetic properties, thermal conductivity (26.1 W/m·K), and cost efficiency make it ideal for automotive trims, industrial equipment, and architectural components. Cold rolling enhances surface smoothness (Ra ≤0.5µm) and tensile strength by 15–20% versus hot-rolled variants, ensuring reliability in stainless steel coil roofing nails and structural stainless steel coil kit assemblies.

Technical Specifications

Table 1: Chemical Composition (ASTM A240)

Table 2: Mechanical Properties

Table 3: Physical Properties

Table 4: Size & Tolerance (Cold Rolled)

Table 5: Processing Capabilities

Detailed Properties & Performance

1. Tensile Strength and Bendability

Cold rolling refines the grain structure of Grade 430, elevating its tensile strength to 450–600 MPa—30% higher than annealed variants. This enables load-bearing performance in structural stainless steel coil kit frameworks and pressure vessels. Despite its ferritic nature, the alloy sustains 22% elongation, permitting 180° bending (radius ≥1.5× thickness) without fracture. Post-bend annealing (760–815°C) reverses work hardening, restoring ductility for complex fabrications like exhaust manifolds or stainless steel tubing coils.

2. Corrosion Resistance and Rust Prevention

Grade 430 resists organic acids, nitric acid, and atmospheric corrosion but may rust under prolonged chloride exposure (e.g., coastal or de-icing salt environments). Rust triggers include:

• Passive Layer Damage: Scratches or iron contamination disrupt the chromium oxide layer, enabling oxidation.
• Intergranular Corrosion: Carbide precipitation at 400–600°C reduces chromium diffusion at grain boundaries.
• Galvanic Corrosion: Contact with dissimilar metals (e.g., copper) in electrolyte-rich environments.
  Prevention strategies:
• BA/No.4 Finishes: Smoother surfaces (Ra ≤0.5µm) limit contaminant adhesion.
• Passivation: Nitric acid treatments restore oxide layers post-fabrication.

3. Identification and Certification

Each coil includes:

• Laser-Etched Markings: "SUS430" or "1.4016" near the coil head.
• Mill Test Certificate (EN 10204 3.1): Validates compliance with ASTM A240, EN 10088-2, and JIS G4303, listing heat number, chemical analysis, mechanical properties, and eddy-current test results.

4. Weight Calculation

Calculate coil mass using:
Weight (kg) = Thickness (mm) × Width (mm) × Length (m) × Density (7.75) ÷ 1000
Example: A 1.2mm × 1219mm × 500m coil weighs ≈5,700 kg (±2% tolerance). Custom lengths optimize yield for stainless steel coil roofing nails or tubing production.

Applications

• Construction: Roofing, siding, and stainless steel coil roofing nails (ring-shank design enhances pull-out resistance).
• Automotive: Exhaust systems, trim moldings, and structural stainless steel coil kit brackets.
• Industrial Fabrication: Stainless steel tubing coils for heat exchangers, hydraulic lines, and chemical tanks.
• Consumer Goods: Appliance housings, cookware, and hardware kits.

Why Choose Our Cold Rolled 430 Stainless Steel Coils?

1. Zero Tolerance Defects: Cold rolling precision ensures thickness uniformity (±0.02mm), critical for high-speed stamping of stainless steel coil roofing nails.
2. Corrosion Warranty: 10-year guarantee against pitting in ISO 9223 C1-C2 environments.
3. Global Compliance: Certified to ASTM A240, PED 2014/68/EU, and ASME Sec. VIII.
4. End-to-End Customization: Slitting, edge-milling, and annealing tailored for stainless steel coil kit or tubing applications.
5. Sustainable Manufacturing: 100% recyclable coils with ISO 14001-certified production.