304L Stainless Steel Coil | Low-Carbon Excellence for Demanding Fabrication
✓ Weld-Without-Worry: Carbon-restricted chemistry prevents carbide precipitation, achieving AWS D1.6 Class W immunity to weld decay.
✓ Corrosion Defense: 18% Cr + 10% Ni alloy matrix withstands 1,000+ hours in ASTM B117 salt spray testing.
✓ Forming Versatility: 50% elongation enables deep drawing, spinning, and stretch-forming (LDR ≥2.2).
✓ Hygienic Compliance: 2B/BA finishes meet NSF/ANSI 51 for direct food contact surfaces.
304L Stainless Steel Coil (UNS S30403)
Optimized for welded structures and high-temperature service, 304L stainless steel coil delivers superior intergranular corrosion resistance with ultra-low carbon content (≤0.03%). This stabilized austenitic grade maintains the versatility of standard 304 while eliminating sensitization risks in welding and stress-relieving operations. Certified to ASTM A240/A480 and FDA CFR 21, it is the trusted choice for food processing, chemical equipment, and architectural applications requiring long-term durability.
– Thickness: 0.2mm–8.0mm (±0.015mm precision for cold-rolled coils)
– Width: 300mm–2000mm (slitting tolerance ±0.3mm)
– Coil Parameters:
ID: 508mm/610mm | OD: ≤2500mm | Weight: 3-20 tons
– Mechanical Properties: Yield Strength ≥170 MPa | Tensile Strength ≥485 MPa | Hardness ≤90 HRB
| Parameter Category | Value/Description |
|---|---|
| Material Grade | UNS S30403 (per ASTM A240) |
| Composition (%) | C≤0.03, Cr 18.0-20.0, Ni 8.0-12.0, Mn≤2.0, Si≤1.0, P≤0.045, S≤0.03, N≤0.10 |
| Tensile Strength (MPa) | ≥485 (Annealed) |
| Yield Strength (MPa) | ≥170 (Annealed) |
| Elongation (%) | ≥40 (50mm gauge length) |
| Hardness | Brinell (HB): ≤201; Rockwell (HRB): ≤92 (Annealed) |
| Density (g/cm³) | 8.03 |
| Melting Range | 1400-1450℃ |
| Thermal Conductivity (W/m·K) | 16.2 (20℃) |
| Thermal Expansion (10⁻⁶/℃) | 17.2 (20-100℃) |
| Electrical Resistivity (Ω·m) | 0.72×10⁻⁶ (20℃) |
| Elastic Modulus (GPa) | 193 |
| Magnetic Properties | Non-magnetic (Annealed) |
| Corrosion Resistance | Excellent resistance to general corrosion, oxidizing acids, and organic acids; resists intergranular corrosion (due to ultra-low carbon content, no post-weld heat treatment required) |
| Heat Treatment | Annealing: 1010-1120℃ followed by rapid cooling (water or air quenching) |
| Surface Finishes | 2B (Cold-rolled bright annealed), BA (Bright annealed), No.4 (Brushed), No.8 (Mirror polish) |
| Coil Dimensions | Thickness: 0.3mm-6.0mm; Width: 600mm-2000mm; Inner Diameter: 508mm/610mm (standard) |
| Standards | ASTM A240/A240M, JIS G4304, EN 10088-2, GB/T 4237 |
| Applications | Food processing equipment, pharmaceutical tanks, welded pipes, automotive stamping parts, architectural cladding, deep-drawn containers |
304L Stainless Steel Coil Applications
| Industry | Critical Uses | 304L Coil Advantage |
|---|---|---|
| Food Processing | CIP wash systems, meat smoking chambers | Resists nitric acid sanitizers (up to 20% concentration). |
| Chemical Storage | Acid neutralization tanks, vent hoods | Zero intergranular corrosion after stress relief at 450°C. |
| Pharmaceutical | Tablet press parts, cleanroom ducting | Electropolished coils achieve Ra ≤0.4μm (ISO 13485 compliant). |
| Architecture | Welded façade systems, coastal railings | Survives 50-year coastal exposure per ASTM G52. |
304L Stainless Steel Coil Product Packaging
304L stainless steel coils are packaged in triple-sealed anti-static polyethylene packaging to prevent scratches, dust and oxidation during transportation. Each package is lined with VCI (vapor rust inhibitor) paper, which releases protective molecules to prevent rust in humid or salty environments, ideal for coastal construction or chemical industries. Bulk orders are secured on ISO-certified heavy-duty pallets with reinforced steel edges and weather-resistant shrink wrap to ensure stability for large-volume shipments. Environmentally conscious customers can choose FSC-certified recycled cardboard boxes or reusable aluminum packaging boxes, which can reduce landfill waste by 90%.
Anti-rust packaging
VCI gas phase anti-rust film + desiccant (12 months moisture-proof for sea transportation)
Reinforcement method
Steel strapping + wooden pallet (load-bearing ≤ 5 tons)
Surface protection
Polyethylene film layered isolation (anti-scratch)
Customization options
IPPC fumigation wooden box (compliant with ISPM15 standard)
Why Choose Us
Where Precision Meets Partnership，25 years of focus on metal material science，Not only a supplier, but also your engineering consultant，Fast and zero compromise，Sustainable trust cycle。
Full specification coverage & flexible customization
Unlimited size: thickness 0.1mm ultra-thin plate to 300mm extra-thick plate, width up to 2000mm, support non-standard cutting. Various surface treatments: 2B, BA mirror, brushed (No.4), sandblasting, etc., to meet food grade, medical grade or decorative needs.
Global Certification & Quality Assurance
Full-process certification: products comply with international standards such as ASTM, EN, JIS, and provide traceable MTC (factory test certificate). Strict quality inspection: from raw materials to finished products, 100% pass spectral analysis, hardness test and salt spray test to ensure zero-defect delivery.
Fast delivery & global supply
Multi-location warehousing: strategic inventory in Asia, Europe, and America, urgent orders will arrive globally within 15 days. One-stop service: provide value-added services such as striping, laser cutting, welding processing, etc. to shorten customer production cycle.
Industry Solution Experts
Cross-domain experience: 20 years of experience in the chemical, energy, construction, medical and other industries, providing targeted material selection guides.
Technical support: Free welding parameter recommendations, corrosion resistance reports and installation guidance to reduce customer risks.
Cost optimization capabilities
Price transparency: Direct-operated factories have no middleman price difference, long-term customers enjoy tiered discounts and quarterly price lock services. Zero waste commitment: Precise cutting according to customer drawings, and surplus material repurchase plan to reduce material waste.
Sustainable production
Environmentally friendly process: Using electric arc furnace (EAF) steelmaking, 90% of the raw materials are recycled steel, and the carbon footprint is reduced by 40%. Circular economy: Provide scrap stainless steel plate recycling and remelting services to help customers achieve ESG goals.
304L Stainless Steel Coil Shipping
Sea transport
40HQ container (loading capacity 28 tons) / bulk carrier (LCL minimum 1 ton)
Air transport
reach major airports around the world within 7 days (DDP/DAP terms)
Land transport
door-to-door within China (qualification for dangerous goods transportation)
Our Services
We guarantee global door-to-door delivery within 7–15 business days via partnerships with DHL, Maersk, and UPS.
FAQ
Q1: When should I choose 304L over 304 coils?
Mandatory for:
– Welded sections >6mm thickness
– Post-weld heat treatment between 450-850°C
– Applications exposed to chlorides >50ppm at 60°C+
Q2: What certifications support hygienic applications?
Standard compliance includes:
– 3.1 Mill Certificate with PMI verification
– EN 10204 3.2 for pressure vessel compliance
– Optional NSF-61 certification for drinking water systems
Q3: How to prevent surface scratches during coil processing?
A: Specify our proprietary Peel-Off Protective Film (POPF™) – reduces surface defects by 95% vs standard VCI paper.
Q4: What’s the minimum production lead time?
– Stock coils: 15 days FOB
– Custom sizes/surface finishes: 20 days (min. 10 tons)
– Medical-grade orders: 30 days with cleanroom documentation
Q5: How is coil flatness guaranteed?
Our TensionMaster™ coiling technology ensures:
– Crossbow ≤0.1% of width
– Camber ≤2mm/2m length
– Edge wave ≤0.3% of coil width
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