Cost-Effective 201/430 Stainless Steel Coil | Cold Rolled Quality

Product Overview

Key Technical Specifications

Tensile & Bend Strength

The 201 stainless steel coil offers tensile strength of ≥450 MPa and yield strength of ≥205 MPa, making it ideal for cost-sensitive applications like architectural trim, kitchenware, and stainless steel siding nails coil manufacturing. Its austenitic-ferritic hybrid structure balances formability and magnetic properties, suitable for decorative and light industrial uses.

The 430 stainless steel coil matches the tensile strength of 201 (≥450 MPa) but excels in high-temperature environments (up to 815°C) due to its ferritic structure. This makes it a preferred choice for automotive exhaust systems and stainless steel tubing coil applications requiring heat resistance and moderate corrosion protection.

Weight Calculation

Calculate coil weight using:

$$\text{Weight (kg)}=\text{Thickness (mm)}\times \text{Width (m)}\times \text{Length (m)}\times \text{Density (g/cm³)}\times 0.001$$

Example: A 430 coil (0.5mm thick, 1.2m wide, 50m long) weighs:

$$0.5\times 1.2\times 50\times 7.75\times 0.001=2.33\text{kg}$$

This formula is critical for logistics planning, especially when sourcing from stainless steel coil suppliers for large-scale projects.

Identification Methods

• Chemical Analysis: Confirm Cr (16–18%) and Mn (5.5–7.5%) for 201; Cr (16–18%) and Mn (≤1.0%) for 430 via XRF testing.
• Spark Testing: 201 produces bright, short sparks due to high manganese; 430 generates shorter sparks with minimal branching.
• Magnetic Testing: 201 is weakly magnetic; 430 is fully magnetic, distinguishing it from austenitic grades.

Causes of Stainless Steel Corrosion

1. Chloride-Induced Pitting: Coastal environments or de-icing salts penetrate the passive Cr₂O₃ layer, forming micro-pits. 430 is more vulnerable due to lower nickel content.
2. Galvanic Corrosion: Contact with carbon steel or copper in humid conditions accelerates oxidation. Use insulating spacers in stainless steel tubing coil installations to mitigate this.
3. Mechanical Abrasion: Scratches from handling tools expose raw metal to oxygen. Mirror finishes (Ra ≤0.2μm) reduce this risk.
4. Intergranular Corrosion: Improper annealing in 430 coils leads to chromium carbide precipitation at grain boundaries, reducing corrosion resistance.
5. Organic Acid Accumulation: Food residues or industrial chemicals form corrosive films on unpolished surfaces.

Applications & Advantages

Versatile Industrial Use

• Automotive: 430’s heat resistance suits exhaust systems, while 201’s formability enhances trim and stainless steel siding nails coil production.
• Construction: Mirror and hairline finishes (Ra ≤0.5μm) resist urban pollution in façades and roofing.
• HVAC & Energy: 430’s thermal conductivity (25 W/m·K) ensures efficient heat distribution in stainless steel tubing coil systems.

Functional Benefits

1. Cost Efficiency: 201 reduces material costs by 30–40% compared to 304/316 grades.
2. Recyclability: 100% recyclable with minimal quality loss, supporting circular manufacturing goals.
3. Self-Healing Oxide Layer: Chromium (≥16%) regenerates Cr₂O₃ to repair minor scratches.

Why Choose Our Stainless Steel Coils?

1. Certified Quality: Sourced from TISCO/BAOSTEEL mills with ISO 9001, SGS, and RoHS compliance.
2. Custom Fabrication: Tailored slitting (3–2000mm), embossing, and polishing for stainless steel coil suppliers projects.
3. Global Logistics: 7–15-day delivery via FOB/CIF with VCI anti-rust packaging.
4. Cost Efficiency: Direct mill partnerships reduce prices by 15–20% vs. competitors.
5. Technical Expertise: 20+ years in alloy selection, welding, and corrosion prevention consulting.