Product Overview

Key Features of 409L Stainless Steel

• Low Carbon Content: Minimizes sensitization during welding.
• Titanium Stabilization: Enhances resistance to intergranular corrosion.
• Ferritic Structure: Offers magnetic properties and good thermal conductivity.
• Cost-Effective Alternative: Lower nickel content compared to austenitic grades like 304.
• Good High-Temperature Performance: Suitable for continuous service up to 600–650°C.

Surface Finishes: 2D vs. NO.1

Note: While "2D" is typically associated with cold-rolled material, some suppliers may use the term loosely. True 2D finish originates from cold rolling followed by annealing and pickling. NO.1 is exclusively a hot-rolled finish.

Technical Specifications

Chemical Composition (ASTM A240 / JIS G4303)

Mechanical Properties

Available Forms & Dimensions

Hot Rolled 409L Plate/Sheet (NO.1 Finish)

• Thickness: 3.0 mm – 50.0 mm
• Width: 1000 mm – 2000 mm (standard); up to 3000 mm (custom)
• Length: 2000 mm – 6000 mm (cut-to-length available)
• Coil Option: Limited; typically supplied as plate/sheet

Cold Rolled 409L Sheet (2D Finish)

• Thickness: 0.3 mm – 4.0 mm
• Width: 1000 mm – 1500 mm (standard); up to 2000 mm (special order)
• Length: In coil (up to 10,000 m) or cut-to-length sheets
• Tolerance: Tight thickness tolerance (±0.05 mm for thin gauges)

Customization: Width, length, edge type (mill edge or slit edge), and hardness (HV 145–680 via temper rolling) can be tailored per customer requirements.

Applications

• Automotive Industry: Exhaust pipes, mufflers, catalytic converter shells
• Industrial Equipment: Heat exchangers, burner parts, flue gas ducts
• Agricultural Machinery: Plows, harrows, and other wear-resistant components
• Construction: Non-decorative cladding, support structures in mildly corrosive environments
• Energy Sector: Components in biomass and waste-to-energy plants

Advantages Over Competing Grades

Tip: Choose 409L when budget constraints exist, welding is required, and exposure to aggressive chlorides or acids is minimal.

Processing & Fabrication Guidelines

• Cutting: Plasma, laser, or mechanical shearing (use sharp tools to avoid work hardening).
• Forming: Good cold formability; avoid sharp bends in thick sections.
• Welding: Excellent with TIG, MIG, or resistance welding. No preheating required. Post-weld annealing not usually necessary due to Ti stabilization.
• Machining: Moderate machinability; use lubricants and slow speeds.
• Surface Treatment: Pickling recommended after welding to restore corrosion resistance. Painting or powder coating enhances longevity in outdoor use.

Quality Assurance & Standards Compliance

• ASTM A240/A240M (Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip)
• JIS G4304 / G4305 (Japanese Industrial Standards)
• EN 10088-2 (European Standard for flat products)
• GB/T 4237 / GB/T 3280 (Chinese National Standards)

• Mill Test Certificate (MTC) per EN 10204 3.1
• Spectrometric analysis report
• Dimensional inspection records
• Optional: Ultrasonic testing (for critical applications)

Packaging & Delivery

• Sheets: Interleaved with paper or PVC film, strapped on wooden pallets
• Coils: Wrapped in waterproof VCI film, secured with steel banding
• Export Packaging: Fumigated wooden crates (ISPM 15 compliant)
• Lead Time: 7–15 days for standard sizes; 20–30 days for custom orders

Why Choose Our 409L Stainless Steel?

• Source Directly from Leading Mills: Including TISCO (Taiyuan Iron & Steel), Baosteel, and Ningbo Baosteel New Materials.
• Consistent Quality: Advanced ESR (Electroslag Remelting) and AOD (Argon Oxygen Decarburization) processes ensure low inclusion content.
• Technical Support: Our metallurgical team provides application-specific advice on grade selection, processing, and surface finish.
• Global Logistics: FOB Shanghai, Tianjin, or Ningbo; CIF/DDP options available.

Frequently Asked Questions (FAQ)

Conclusion