Stainless Steel Strip Coil Alloy SUS304 SUS316L SUS321 SUS430 Narrow SS Strips Width 5 - 50mm

Stainless Steel Strip Coil Alloy SUS304 SUS316L SUS321 SUS430 Narrow SS Strips Width 5 - 50mm

Products Specification

What is Stainless Steel Strip?

Manufacturing Process

1. Melting and Casting: Raw materials such as iron ore, chromium, nickel, and other alloying elements are melted in electric arc furnaces. The molten metal is then cast into slabs or billets.
2. Hot Rolling: The slabs are heated and rolled into thinner sheets called "hot-rolled coils," reducing thickness while improving mechanical properties.
3. Cold Rolling: Hot-rolled coils undergo cold rolling to achieve the desired thickness, surface finish, and dimensional accuracy. This process also enhances strength and hardness.
4. Annealing: After cold rolling, the strip is annealed in a controlled atmosphere to relieve internal stresses and restore ductility. Annealing temperatures typically range from 800°C to 1100°C, depending on the stainless steel grade.
5. Surface Treatment: Various surface finishes are applied, including 2B (matte), BA (bright annealed), and polished, to meet specific application requirements.
6. Slitting and Cutting: The final coils are slit into strips of precise widths using advanced slitting machines, ensuring tight tolerances.

Types and Grades

• Austenitic: The most widely used type, containing high levels of chromium and nickel (e.g., 304, 316). These strips offer excellent corrosion resistance, formability, and weldability, making them ideal for food processing, chemical equipment, and decorative applications.
• Ferritic: Contains chromium but little or no nickel (e.g., 430). They are magnetic, cost-effective, and suitable for applications like automotive trim and kitchen appliances.
• Martensitic: Hardenable by heat treatment, with high strength and wear resistance (e.g., 410). Used in cutlery, valves, and mechanical components.
• Duplex: Combines austenitic and ferritic structures (e.g., 2205), offering high strength and corrosion resistance for oil and gas, marine, and structural applications.

Key Properties

• Corrosion Resistance: The chromium oxide layer protects against rust and chemical attack, even in humid, acidic, or salty environments.
• Strength and Durability: Cold rolling enhances tensile strength, allowing the strip to withstand mechanical stress and heavy loads.
• Heat Resistance: High-temperature grades (e.g., 310) retain their properties at temperatures exceeding 800°C, suitable for furnace parts and exhaust systems.
• Formability: Easily bent, stamped, or welded into complex shapes without compromising integrity, enabling versatile design applications.
• Hygiene: Non-porous surface prevents bacterial growth, making it ideal for medical equipment, food processing, and pharmaceutical machinery.

Applications

• Automotive Industry: Used in exhaust systems, fuel lines, and decorative trim due to heat and corrosion resistance.
• Electronics: Precision strips serve as connectors, battery components, and shielding in smartphones, computers, and electrical devices.
• Medical Devices: Biocompatible grades (e.g., 316L) are used in surgical instruments, implants, and diagnostic equipment.
• Construction: Applied in roofing, cladding, and structural components for its durability and aesthetic appeal.
• Household Goods: Found in kitchen utensils, appliances, and hardware for its hygiene and sleek finish.

Advantages Over Other Materials

• Longer service life due to corrosion resistance, reducing replacement costs.
• Higher strength-to-weight ratio, enabling lightweight yet robust designs.
• Recyclability: Over 90% of stainless steel is recyclable, making it an eco-friendly choice.
• Low maintenance: Requires minimal cleaning and upkeep, even in demanding environments.