304 Stainless Steel Coil | The Versatile Corrosion Fighter
✓ All-Purpose Corrosion Resistance: Survives 500+ hours in ASTM B117 salt spray testing – ideal for indoor/outdoor hybrid environments.
✓ Forming Flexibility: 45% min elongation enables complex roll-forming, stamping, and hydroforming.
✓ Hygienic Surface Readiness: 2B/BA/No.4 finishes comply with NSF/ANSI 51 for direct food contact.
✓ Batch Consistency: Controlled annealing (1050°C ±10°C) ensures uniform hardness (HV 150-200).
304 Stainless Steel Coil (UNS S30400)
As the industry’s most versatile austenitic stainless steel, 304 coils deliver balanced corrosion resistance, formability, and cost efficiency for mass production. With 18% chromium and 8% nickel alloy composition, these coils excel in mildly corrosive environments while maintaining exceptional weldability and deep-drawing performance. Certified to ASTM A240/A480 and EN 10088-2, they are the go-to choice for appliances, architectural trim, and food processing equipment.
– Thickness: 0.3mm–6.0mm (±0.02mm for precision coils)
– Width: 600mm–2000mm (slit-to-width tolerance ±0.5mm)
– Coil ID/OD: 508mm/1500mm standard (customizable up to 2500mm OD)
– Mechanical Properties: Yield Strength ≥205 MPa | Tensile Strength ≥515 MPa | Hardness ≤92 HRB
| Parameter Category | Value/Description |
|---|---|
| Material Grade | UNS S30400 (per ASTM A240) |
| Composition (%) | C≤0.08, Cr 18.0-20.0, Ni 8.0-10.5, Mn≤2.0, Si≤1.0, P≤0.045, S≤0.03 |
| Tensile Strength (MPa) | ≥515 (Annealed) |
| Yield Strength (MPa) | ≥205 (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; moderate intergranular corrosion resistance (avoid sensitization) |
| 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, architectural trim, household appliances, automotive exhaust systems, chemical containers, stamping parts |
304 Stainless Steel Coil Applications
| Industry | Typical Uses | 304 Coil Advantage |
|---|---|---|
| Food & Beverage | Conveyor belts, fermentation tanks | Passes 3% acetic acid immersion testing (FDA CFR 175.300). |
| Automotive | Exhaust systems, trim moldings | Withstands 400°C intermittent heat (20% weight savings vs 409). |
| Construction | Elevator panels, roofing sheets | 0.5mm ultra-thin coils reduce material costs by 25%. |
| Electronics | PCB shielding, chassis components | Non-magnetic annealed state (μ ≤1.005). |
304 Stainless Steel Coil Product Packaging
304 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.
304 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: How does 304 differ from 304L coils?
A: 304 has a 0.08% max carbon content (vs 0.03% for 304L), offering better strength at room temperature. Choose 304L only for heavy welding (>6mm) or 450°C+ service.
Q2: What surface finishes prevent fingerprint marks?
A: Opt for BA (Bright Annealed) finish with optional PVDF coating – reduces smudging by 80% vs standard 2B finish.
Q3: What’s the minimum order quantity?
A: Standard specs: 5-ton MOQ. Custom widths/thicknesses: 10-ton MOQ with 25-day lead time.
Q4: How to avoid coil winding defects?
Our proprietary Tension-Controlled Winding (TCW™) system guarantees:
– Camber ≤1mm/m
– Crossbow ≤0.2% of width
– No edge waves (EI ≤0.5)
Q5: What certifications ensure quality?
Every shipment includes:
– Mill Test Certificate (EN 10204 3.1)
– RoHS/REACH compliance statement
– Surface roughness test report (per ISO 4287)
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