ASTM SA240M 321 Stainless Steel Plate 304 304L Cold Rolled Customized Size 316ti AISI 0.3mm-3.0MM Thickness 2B BA Mirror Stainless Steel Sheet Factory
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. Here's a detailed breakdown of its key attributes and applications:
Composition
304L is defined by its low carbon content (≤0.03%) , which minimizes carbide precipitation during welding, a critical advantage over standard 304 stainless steel. 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.
Mechanical Properties
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 .
Applications
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, meeting FDA and LFGB standards .
Medical Devices: Surgical instruments and implants due to biocompatibility .
Construction: Architectural trim, roofing, and coastal structures (resistant to salt-laden air) .
Chemical Processing: Storage tanks and pipelines for non-aggressive acids (e.g., ≤10% sulfuric acid) .
Automotive: Exhaust systems and decorative trim .
Marine (Non-Direct Seawater): Coastal infrastructure and boat fittings where chloride exposure is moderate .
Welding & Fabrication
Welding Techniques: TIG (Tungsten Inert Gas) welding is preferred due to precise heat control, minimizing distortion and carbide precipitation. 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 rAISId cooling) can restore ductility after heavy cold working .
Surface Finishes
Common finishes for 304L sheets include:
2B: Smooth, reflective finish for general purposes (e.g., kitchen appliances) .
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 (e.g., countertops) .
Embossed: Textured surfaces for grip or aesthetics .
Price & Availability
Cost: In 2025, prices range from $15,300 to $24,000 per metric ton , depending on thickness, finish, and regional demand. For example, a 5.0mm-thick sheet may cost ~$15,300/ton, while thinner gauges (e.g., 0.3mm) can exceed $20,000/ton .
Availability: Widely stocked by global suppliers like Bao Pu Steel (China), with standard sizes (e.g., 1000-2000mm width, 2000-6000mm length) and custom cuts available .
Comparison with 316L
While 304L offers excellent general corrosion resistance, 316L (with 2-3% molybdenum) is superior in chloride-rich environments (e.g., seawater, harsh chemicals). However, 304L is 15-30% cheaper and better suited for cost-sensitive applications where extreme durability isn't required.
Key Considerations
Limitations: Avoid direct contact with high-concentration chlorides (e.g., saltwater) or strong acids (e.g., concentrated sulfuric acid) .
Certifications: Look for ISO 9001, SGS, and RoHS compliance for quality assurance .
Storage: Store in dry, ventilated areas to prevent surface contamination and rust .
In summary, 304L stainless steel sheets balance performance, affordability, and versatility, making them a top choice for industries where corrosion resistance and weldability are critical. Always consult material specifications (e.g., ASTM A240, EN 10088) for project-specific requirements.
| Feature |
430 Stainless Steel Strip |
304 Stainless Steel Strip |
Key Difference |
| Material Type |
Ferritic (magnetic) |
Austenitic (non-magnetic/weakly magnetic) |
430 is attractable by magnets |
| Chromium Content |
16-18% |
18-20% |
304 offers better corrosion resistance |
| Nickel Content |
≤0.75% |
8-10% |
430 has significantly lower cost |
| Corrosion Resistance |
Good (dry environments) |
Excellent (chloride-containing environments) |
430 is unsuitable for high-humidity/seawater environments |
| Price |
Benchmark (100%) |
Approximately 1.6x |
430 provides higher cost-performance |
Q1: Why choose us?
A: Our company, as an internationally experienced and professionalsupplier, has been engaged in steel business for more than ten years. Wecan provide a variety of steel products with high quality to our clients.
Q2: Can you provide OEM/ODM service?
A: Yes. Please feel free to contact us for more details
Q3:What is your terms of payment?
A: 100% T/T advance.
30% T/T and balance against copy of documents.
30% T/T advance, balance L/C at sight.
Q4: Can we visit your factory?
A: Warmly welcome. Once we have your schedule, we will arrange theprofessional sales team to follow up your case.
Q5: Can you provide sample?
A: Yes. Sample is free for regular sizes, but the buyer needs to pay freightcost.
Q6: How long is your delivery time?
A: Regular lead time is 15 to 30 days after receiving deposit.
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ASTM SA240M 321 Stainless Steel Plate 304 304L Cold Rolled Customized Size 316ti AISI 0.3mm-3.0MM Thickness 2B BA Mirror Stainless Steel Sheet Factory
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