Top-Tier 316L Stainless Steel Coil | Mirror Finish & Polished Edge

Product Overview

Key Technical Specifications

Tensile & Bend Strength

The 316L stainless steel coil delivers exceptional tensile strength (≥480 MPa) and yield strength (≥175–210 MPa), making it ideal for high-stress industrial environments such as chemical processing and stainless steel coiled tube systems. Its austenitic structure, enhanced with 2–3% molybdenum, provides superior resistance to chloride-induced pitting and crevice corrosion, outperforming standard 304 grades. The elongation rate of ≥40% ensures excellent ductility for complex forming processes like deep drawing and bending without cracking, crucial for 2 inch stainless steel coil tubing fabrication.

Weight Calculation

Calculate coil weight using:

$$\text{Weight (kg)}=\text{Thickness (mm)}\times \text{Width (m)}\times \text{Length (m)}\times 7.98\times 0.001$$

Example: A 316L coil (2mm thick, 1.5m wide, 50m long) weighs:

$$2\times 1.5\times 50\times 7.98\times 0.001=11.97\text{kg}$$

This formula is critical for logistics planning and cost estimation, particularly for large-scale applications of stainless steel coils such as heat exchangers and marine pipelines.

Identification Methods

• Chemical Analysis: Confirm Cr (16–18%), Mo (2–3%), and Ni (10–14%) via XRF testing.
• Magnetic Testing: Non-magnetic in annealed states but slightly magnetic after cold working.
• Spark Testing: Produces reddish sparks with minimal branching, contrasting with high-carbon steels.

Causes of Stainless Steel Corrosion

1. Chloride-Induced Pitting: Coastal environments or de-icing salts penetrate the passive Cr₂O₃ layer, forming micro-pits. 316L’s molybdenum content reduces this risk by 30–50% compared to 304.
2. Galvanic Corrosion: Contact with carbon steel or copper in humid conditions accelerates oxidation. Use insulating spacers in stainless steel coiled tube installations.
3. Mechanical Abrasion: Scratches from handling tools expose raw metal to oxygen. Mirror finishes (Ra ≤0.2μm) reduce this risk.
4. High-Temperature Oxidation: Prolonged exposure above 870°C degrades chromium’s oxide film. 316L outperforms 304 in thermal stability up to 925°C intermittently.
5. Organic Acid Accumulation: Food residues or industrial chemicals form corrosive films, particularly on unpolished surfaces.

Applications & Advantages

Versatile Industrial Use

• Chemical & Petrochemical: Resists sulfuric acid and chloride-rich environments in 2 inch stainless steel coil tubing for reactors and pipelines.
• Marine Engineering: Ideal for ship components and offshore platforms due to saltwater corrosion resistance.
• Medical & Food Processing: Hygienic 2B/BA finishes (Ra ≤0.2μm) prevent bacterial growth in surgical tools and dairy tanks.
• Energy Systems: Used in applications of stainless steel coils for heat exchangers and boiler plates.

Functional Benefits

1. Self-Healing Oxide Layer: Chromium (≥16%) forms a regenerative Cr₂O₃ film to repair minor scratches.
2. Thermal Stability: Withstands temperatures up to 870°C (continuous) and 925°C (intermittent).
3. Cost Efficiency: Longer lifespan reduces replacement frequency, offering 20–30% lower lifecycle costs than carbon steel.

Why Choose Our 316L Stainless Steel Coils?

1. Certified Quality: Sourced from TISCO/BAOSTEEL mills with ISO 9001, SGS, and RoHS compliance.
2. Custom Fabrication: Tailored slitting (3–2438mm), mirror polishing, and precision edging for 2 inch stainless steel coil tubing 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.