304L Stainless Steel Plate Ultra-low carbon precision, worry-free corrosion resistance
Extreme corrosion resistance: 18% chromium + 10% nickel + 2% molybdenum reinforced formula, passed ASTM G48 standard 1000 hours salt spray test
Welding zero sensitization: Ultra-low carbon design eliminates carbide precipitation in the heat-affected zone, and no secondary solution treatment is required after welding
Green traceability: Each batch is equipped with an original material certificate (including full element spectrum analysis report)
Precision cutting force: Rockwell hardness HRB≤90, supports high-precision stamping/deep drawing
304L Stainless Steel Plate (UNS S30403)
High-performance austenitic stainless steel plate designed for harsh environments, through low-carbon treatment with a carbon content of ≤0.03%, significantly improves the resistance to intergranular corrosion in welding and high-temperature scenarios. It complies with ASTM A240/A480 standards, dual certification ISO 17752 (heavy metal release safety) and FDA food contact material specifications, and is suitable for pharmaceutical, chemical, marine engineering and other fields that require extremely high material stability.
– Thickness range: 0.3mm-50mm (±0.01mm precision cold-rolled plate optional)
– Surface treatment: 2B/No.4/BA/8K mirror, supports PVD coating anti-fingerprint process
– Mechanical properties: yield strength ≥170MPa, tensile strength ≥485MPa, elongation ≥40%
| 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; resistant to intergranular corrosion (due to ultra-low carbon) |
| 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) |
| Dimension Range | Thickness: 0.3mm-200mm; Width: 1000mm-2000mm; Length: Custom |
| Standards | ASTM A240/A240M, JIS G4304, EN 10088-2 |
| Applications | Food processing equipment, pharmaceutical tanks, chemical storage, welded structures, cryogenic vessels, nuclear components |
304L Stainless Steel Plate Applications
304 stainless steel plates excel in corrosion-resistant, high-temperature environments, making them ideal for
Shipbuilding: hull structural parts, deck accessories (preferred materials for salt spray environments)
Chemical equipment: reactor liner, piping system (resistant to sulfuric acid/phosphoric acid corrosion)
Medical equipment: surgical instrument holders, sterilization containers (passed ISO 13485 biocompatibility test)
Architectural decoration: coastal building curtain walls, handrails (providing No.4/HL mirror polishing process)
304L Stainless Steel Plate Product Packaging
304L Stainless Steel Plates are encased in triple-sealed, anti-static polyethylene wraps to safeguard against scratches, dust, and oxidation during transit. Each plate is interleaved with VCI (Vapor Corrosion Inhibitor) paper, which releases protective molecules to prevent rust formation in humid or saline environments—ideal for coastal construction or chemical industries. Bulk orders are secured on heavy-duty, ISO-certified pallets with reinforced steel edges and weather-resistant shrink wrapping, ensuring stability for high-volume shipments. Eco-conscious customers can choose FSC-certified recycled cardboard sleeves or reusable aluminum crates, reducing landfill waste by 90%. Customizable packaging includes QR-code labels for instant access to ASTM A240 compliance certificates and handling tutorials.
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 Plate 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: What is the core difference between 304L and ordinary 304 stainless steel?
A: The carbon content is reduced by more than 50% (0.03% vs 0.08%), and the resistance to intergranular corrosion in the heat-affected zone of welding is increased by 3 times, which is more suitable for thick plate welding and high temperature environments above 500℃.
Q2: Do you provide environmental certification documents?
A:The RoHS 2.0+REACH SVHC 239 test report issued by SGS is provided with the goods, and customized NSF/3.1 food grade certificates are supported.
Q3: How to choose the surface treatment process of the plate?
A1: – 2B surface: general mechanical structural parts (default process)
A2:– BA mirror: high-end home appliances/decorative panels (reflectivity＞92%)
A3:– No.4 brushed: medical equipment/laboratory countertops (fingerprint-resistant and easy to clean)
Q4: What is the minimum order quantity (MOQ)?
A: The minimum order quantity for conventional specifications is 1 ton, and special thickness/surface treatment supports sample purchase (minimum size 200mm×300mm).
Q5: How to deal with minor surface scratches caused by transportation?
A: Free edge polishing service is provided, or special stainless steel repair paste (compliant with ASTM D3926 standard) is included in the box.
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