Pro-Grade 304/316 Stainless Steel Coil | Polished Performance

Product Overview

Key Technical Specifications

Tensile & Bend Strength

The 304 stainless steel coil delivers tensile strength of 520–750 MPa and yield strength of ≥290 MPa, optimized for applications requiring high ductility and corrosion resistance, such as food processing equipment and architectural cladding. Its austenitic structure ensures non-magnetic properties unless cold-worked, making it ideal for medical devices and kitchen appliances.

The 316 stainless steel coil, enhanced with 2–3% molybdenum, offers superior pitting resistance in chloride-rich environments (e.g., marine or chemical plants). With tensile strength of ≥480 MPa, it maintains structural integrity even under prolonged exposure to temperatures up to 870°C, making it suitable for cleito stainless steel coils in high-performance vaporizers.

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 304 stainless steel coil (2mm thick, 1.5m wide, 100m long) weighs:

$$2\times 1.5\times 100\times 7.93\times 0.001=23.79\text{kg}$$

Identification Methods

• Chemical Analysis: Confirm Cr (18–20%), Ni (8–10.5%) for 304; Cr (16–18%), Mo (2–3%) for 316 via XRF testing.
• Spark Testing: 304 produces reddish sparks with minimal branching, while 316 exhibits shorter sparks due to molybdenum content.
• Magnetic Testing: 304 is non-magnetic unless cold-worked; 316 remains non-magnetic in annealed states.

Causes of Stainless Steel Corrosion

1. Chloride Exposure: Coastal environments or de-icing salts penetrate passive oxide layers, triggering pitting in 304 and 316 grades.
2. Galvanic Corrosion: Contact with dissimilar metals (e.g., carbon steel) in humid conditions accelerates oxidation.
3. Mechanical Damage: Scratches from china stainless steel strip coil handling or tools expose raw metal to oxygen.
4. High-Temperature Oxidation: Prolonged exposure above 843°C degrades chromium’s protective film, reducing corrosion resistance.
5. Organic Acid Accumulation: Industrial chemicals or food residues form corrosive films, particularly in unpolished surfaces.

Applications & Advantages

Versatile Industrial Use

• Food & Medical: Hygienic 2B/BA finishes (Ra ≤0.2μm) prevent bacterial growth, ideal for surgical tools and dairy tanks.
• Architecture: Mirror and hairline finishes enhance façades while resisting urban pollution.
• Energy & Marine: 316 stainless steel excels in offshore platforms and desalination plants due to saltwater resistance.

Functional Benefits

1. Self-Healing Oxide Layer: Chromium (≥10.5%) forms Cr₂O₃ film to repair minor scratches.
2. Thermal Stability: Low thermal expansion (9.2×10⁻⁶/°C) minimizes warping under heat stress.
3. Recyclability: 100% recyclable with no quality loss, supporting circular manufacturing goals.

Why Choose Our Stainless Steel Coils?

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