Natural Color Stainless Steel Plate No4 Surface Finish ASTM SA240m 321 304 304L 201 202 316L 316ti Thickness 03mm 30mm

304L stainless steel sheet is a versatile, low-carbon variant of the 304 grade, prized for its exceptional weldability and resistance to corrosion, particularly in environments prone to sensitization.

304L is defined by its low carbon content (≤0.03%), which minimizes carbide precipitation during welding. Its chemical makeup includes 18-20% chromium (Cr), 8-12% nickel (Ni), and trace elements like manganese (≤2%) and silicon (≤0.75%). This alloy ensures a stable austenitic structure, providing excellent corrosion resistance and formability.

• Tensile Strength: 515-564 MPa (75,000-81,800 psi)
• Yield Strength (0.2% offset): ≥170 MPa (24,660 psi)
• Elongation: ≥40%, enabling deep drawing and complex forming without cracking
• Hardness: HB ≤ 187, HRB ≤ 90
• Density: 8.03 g/cm³ (0.289 lbs/in³)
• Thermal Conductivity: 16.2-16.3 W/m·K at 100°C
• Magnetic Permeability: Nearly non-magnetic in the annealed state

304L's combination of corrosion resistance, weldability, and cost-effectiveness makes it suitable for diverse industries:

• Food & Beverage: Milk tanks, brewery equipment, and kitchen utensils
• Medical Devices: Surgical instruments and implants due to biocompatibility
• Construction: Architectural trim, roofing, and coastal structures
• Chemical Processing: Storage tanks and pipelines for non-aggressive acids
• Automotive: Exhaust systems and decorative trim
• Marine: Coastal infrastructure and boat fittings where chloride exposure is moderate

Welding Techniques: TIG (Tungsten Inert Gas) welding is preferred due to precise heat control. Pulsed current TIG further reduces residual stress and improves bead quality.

Filler Materials: Use 308L or 309L electrodes to match the low-carbon content and prevent corrosion at weld joints.

Post-Weld Treatment: Generally unnecessary, but annealing (1050-1100°C followed by rapid cooling) can restore ductility after heavy cold working.

• 2B: Smooth, reflective finish for general purposes
• BA (Bright Annealed): Mirror-like surface for decorative applications
• No. 4: Matte finish with light polishing, ideal for architectural trim
• HL (Hairline): Brushed finish for scratch resistance and easy cleaning
• Embossed: Textured surfaces for grip or aesthetics

Cost: In 2025, prices range from $15,300 to $24,000 per metric ton, depending on thickness, finish, and regional demand.

Availability: Widely stocked by global suppliers with standard sizes (1000-2000mm width, 2000-6000mm length) and custom cuts available.

While 304L offers excellent general corrosion resistance, 316L (with 2-3% molybdenum) is superior in chloride-rich environments. However, 304L is 15-30% cheaper and better suited for cost-sensitive applications where extreme durability isn't required.