321 Stainless Steel Strip Cold Rolled 0.4-3.0mm 2B Surface

Overview

Key Parameters

• Material Grade: 321 (a titanium-stabilized austenitic stainless steel, designed to prevent carbide precipitation during high-temperature exposure or welding).
• Chemical Composition (Typical, %):
  • Chromium (Cr): 17.0 - 19.0 (enhances oxidation and corrosion resistance).
  • Nickel (Ni): 9.0 - 12.0 (stabilizes the austenitic structure, improving ductility and toughness).
  • Titanium (Ti): 5×(C + N) - 0.70 (stabilizes carbides, preventing intergranular corrosion).
  • Carbon (C): ≤ 0.08 (low carbon content reduces carbide formation).
  • Manganese (Mn): ≤ 2.0.
  • Silicon (Si): ≤ 1.0.
  • Phosphorus (P): ≤ 0.045.
  • Sulfur (S): ≤ 0.030.
• Mechanical Properties:
  • Tensile Strength: ≥ 520 MPa.
  • Yield Strength: ≥ 205 MPa.
  • Elongation: ≥ 40% (in 50mm gauge length).
• High-Temperature Resistance: Maintains structural integrity and oxidation resistance at continuous service temperatures up to 870°C, making it suitable for high-heat environments.

Standards

• ASTM A240/A240M (Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and General Applications).
• JIS G4305 (Stainless Steel Sheets and Strips).
• EN 10088-2 (Stainless Steels - Part 2: Technical Delivery Conditions for Sheets, Plates, and Strips).
• GB/T 3280 (Chinese National Standard for Stainless Steel Cold-Rolled Sheets and Strips, applicable to TISCO products).

Specifications

• Processing: Cold-rolled (ensures precise thickness control, smooth surface finish, and improved dimensional accuracy).
• Thickness: Typically available in a range of 0.1mm - 3.0mm (customizable to meet specific industrial requirements).
• Width: Common ranges from 100mm to 1250mm (adjustable based on customer needs for seamless integration into manufacturing processes).
• Surface Finish: 2B (cold-rolled, annealed, and pickled, resulting in a smooth, matte finish with excellent flatness—ideal for applications requiring paintability or further processing).
• Form: Supplied in coils for efficient handling and automated production lines.

Similar Grades

• 347: Stabilized with niobium (Nb) instead of titanium, providing similar high-temperature performance and weldability, often used as an alternative in applications with strict welding requirements.
• 316Ti: A molybdenum-containing variant (16-18% Cr, 10-14% Ni, 2-3% Mo) with titanium stabilization, offering enhanced corrosion resistance in chloride environments alongside high-temperature strength.
• 1.4541 (EN designation): European equivalent to 321, with matching chemical composition and mechanical properties.
• 321H: A higher-carbon version (C: 0.04-0.10%) designed for improved high-temperature strength in extreme heat applications.

Applications

• Aerospace and Aviation: Components like exhaust systems, jet engine parts, and heat shields, where exposure to extreme temperatures and corrosive gases is common.
• Petrochemical Industry: Heat exchangers, furnace parts, and piping systems handling high-temperature fluids or corrosive media.
• Automotive: Turbocharger components, exhaust manifolds, and emission control systems requiring heat and corrosion resistance.
• Power Generation: Boiler tubes, turbine parts, and incinerator components exposed to high heat and aggressive environments.
• Food Processing: High-temperature equipment (e.g., sterilizers) due to its non-toxic properties and resistance to oxidation.