All Products
-
Raian IonescuMaterial quality very good. we have cooperate more than 10 Years. They trade lots kinds of steel material. All material quality good. They duty for all material quality. We are planing continue cooperate with them in the future
UNS S30403 304L Stainless Steel Plate Non-Magnetic, Formable, and Highly Durable in Mild Environments
Contact me for free samples and coupons.
Whatsapp:0086 18588475571
Wechat: 0086 18588475571
Skype: sales10@aixton.com
If you have any concern, we provide 24-hour online help.
xProduct Details
| Products | Stainless Steel Plate | Grade | 304L |
|---|---|---|---|
| Thickness | 1.5-50.0mm | Tech | Cold Rolled,hot Rolled , Forged |
| Width | 1000mm 1219mm 1500mm Or Customs As Request | Surface | 2B NO.1 |
| Standard | ASTM GB JIS EN DIN | MOQ | 1 Ton |
Product Description
UNS S30403 304L Stainless Steel Plate Non-Magnetic, Formable, and Highly Durable in Mild Environments
Stainless Steel Plate Specifications
| Name | 304L stainless steel Plate |
| Our Grade |
200 Series: 201 202 300 Series: 301 304,304L,304H,309S,310S,314,316L,316Ti,316H,316LN,317L,321,329,347 400 Series: 409L,410,410S,416,420,430,431,436L.439,441,443,444,445,446 Super Stainless Steel: 904L,926,254SMO,654SMO,15-5PH,17-4PH,17-7PH.etc Nickel Alloy: C276, C22,G35,Alloy X,Monel 400,K500,Inconel 600,601,617,625,718,Incoloy 800,800H,800HT,825.etc |
| Technique | Hot Rolled, Cold Rolled,Forged |
| Standard | JIS, AISI, ASTM, DIN, TUV, BV, SUS, etc |
| Thickness | 0.1 – 80.0mm |
| Width range | 10mm – 2000mm |
| Length | Customized |
| Finish | 2B, BA, No.4, 8k, Brushed,Hairline,PVD Coating,Sandblasted |
| Service | Laser Cutting, Bending |
| Sample | Available |
UNS S30403 304L Stainless Steel Plate – Non-Magnetic, Highly Formable, and Durable in Mild Environments
Product Overview
UNS S30403 (AISI 304L) stainless steel plate is the low-carbon variant of the world’s most widely used austenitic stainless steel, engineered for applications demanding excellent formability, non-magnetic properties, and reliable corrosion resistance in mild to moderately aggressive environments.
With a maximum carbon content of 0.03%, 304L eliminates the risk of chromium carbide precipitation during welding—ensuring intergranular corrosion resistance in as-welded conditions without requiring post-weld heat treatment. This makes it ideal for fabricated structures, cryogenic vessels, architectural panels, food processing equipment, and electronic enclosures where magnetic interference must be avoided.
Manufactured to ASTM A240/A240M, ASME SA-240, and EN 10088-2 (1.4307) standards, our 304L plates offer consistent metallurgical quality, full traceability, and global compliance.
Key Characteristics
| Property | Performance |
|---|---|
| Non-Magnetic | Austenitic structure remains non-magnetic in annealed condition (ideal for MRI rooms, sensors, electronics) |
| Highly Formable | Elongation ≥40%; excellent for bending, deep drawing, spinning, and roll forming |
| Weldability | Superior—no sensitization in HAZ; suitable for thick-section welding |
| Corrosion Resistance | Excellent in atmospheric, freshwater, organic acids, and alkaline environments |
| Durability | Long service life with minimal maintenance in indoor or low-chloride outdoor settings |
| Cryogenic Toughness | Retains ductility down to –196°C (–320°F) |
⚠️ Note: Cold working may induce slight magnetism, but this is typically negligible for most non-critical applications.
Technical Specifications
Chemical Composition (Typical – wt%, per ASTM A240)
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 18.0–20.0 |
| Nickel (Ni) | 8.0–12.0 |
| Carbon (C) | ≤0.030 |
| Manganese (Mn) | ≤2.00 |
| Silicon (Si) | ≤0.75 |
| Phosphorus (P) | ≤0.045 |
| Sulfur (S) | ≤0.030 |
| Iron (Fe) | Balance |
- UNS: S30403
- EN: 1.4307
- AISI: 304L
Mechanical Properties (Annealed Condition)
| Property | Typical Value |
|---|---|
| Tensile Strength | 485–620 MPa |
| Yield Strength (0.2% offset) | ≥170 MPa |
| Elongation | ≥40% |
| Hardness | ≤201 HB |
| Density | 8.0 g/cm³ |
| Thermal Conductivity | ~16.2 W/m·K |
| Magnetic Permeability | <1.005 μr (effectively non-magnetic) |
Why Choose 304L for Non-Magnetic & Formable Applications?
✅ Electronics & Medical: Safe for use near sensitive instruments (e.g., MRI machines, lab equipment)
✅ Architectural Interiors: Brushed or mirror finishes with no magnetic attraction—ideal for modern design
✅ Food & Pharma: Smooth, non-porous surfaces support hygiene and CIP/SIP cleaning
✅ Cryogenic Tanks: No embrittlement at ultra-low temperatures
✅ Custom Fabrication: Easily formed into complex shapes—hoods, trays, ducts, enclosures
Unlike ferritic or martensitic steels, 304L’s stable austenitic structure ensures dimensional stability and aesthetic consistency after forming or welding.
Available Product Details
| Parameter | Specification |
|---|---|
| Grade | UNS S30403 / 304L / 1.4307 |
| Standards | ASTM A240, ASME SA-240, EN 10088-2 |
| Form | Hot-rolled plate (≥4.5 mm), Cold-rolled sheet (<4.5 mm) |
| Thickness Range | 0.5 mm to 100 mm (Common stock: 1.0, 2.0, 3.0, 4.0, 6, 8, 10, 12, 16, 20, 25, 30 mm) |
| Standard Sizes | • 1000 × 2000 mm • 1219 × 2438 mm (4' × 8') • 1500 × 3000 mm • 1500 × 6000 mm |
| Surface Finishes | • 2B (standard matte) • No.1 (hot-rolled, descaled) • BA (bright annealed) • No.4 (brushed) • Mirror, Hairline, Embossed (custom) |
| Certifications | EN 10204 3.1/3.2 MTR, PMI, ISO 9001, RoHS, FDA-compliant grades available |
All plates are stored indoors to prevent surface contamination and maintain finish integrity.
Ideal Applications by Sector
| Industry | Use Cases |
|---|---|
| Medical & Electronics | MRI room shielding, sensor housings, non-magnetic tooling, cleanroom furniture |
| Architecture | Interior wall panels, elevator cabs, decorative trim, handrails (non-marine) |
| Food & Beverage | Mixing tanks, conveyor guards, hopper liners, sanitary enclosures |
| HVAC & Ducting | Exhaust systems in non-corrosive environments, custom-formed duct sections |
| Cryogenics | Liquid nitrogen/oxygen storage vessels, transfer lines |
| General Fabrication | Machine guards, control cabinets, brackets, frames requiring complex bends |
Fabrication Best Practices
- Forming: Excellent cold formability; springback is moderate. Anneal if severe deformation causes work hardening.
- Welding: Use ER308L filler. Maintain interpass temp <150°C. No post-weld annealing needed.
- Machining: Moderate machinability—use rigid setups, sharp tools, and high lubrication.
- Finishing: Electropolishing enhances non-magnetic surface purity and corrosion resistance.
- Handling: Avoid contact with carbon steel tools to prevent iron contamination (can cause rust spotting).
Quality Assurance
Every delivery includes:
- Mill Test Report (MTR) with chemical & mechanical data
- Positive Material Identification (PMI) via XRF/OES
- Optional surface roughness (Ra) certification for hygienic applications
- Full compliance with ASTM, ASME, EN, FDA (where applicable)
Material sourced from ISO-certified mills with strict melt chemistry control.
Sustainability & Lifecycle Benefits
- 100% recyclable with high scrap value
- Low environmental impact due to long service life and minimal maintenance
- Energy-efficient over decades of use
- Supports green building and circular economy initiatives
Order Information
- MOQ: 1 piece (cut-to-size); 500 kg (mill order)
- Lead Time:
- Stock: 3–7 working days
- Mill production: 3–5 weeks
- Value-Added Services:
✅ Precision laser/waterjet cutting
✅ Edge deburring & radius forming
✅ Surface polishing (Ra 0.4–3.2 µm available)
✅ VCI packaging for export - Global Shipping: FOB, CIF, or DDP terms
Contact us for a free sample, material data sheet, or application-specific consultation.
Conclusion
When your project demands a non-magnetic, highly formable, and durable stainless steel that performs reliably in mild environments, UNS S30403 304L plate delivers the perfect balance of functionality, safety, and cost-efficiency. Trusted across industries from healthcare to architecture, it remains the benchmark low-carbon austenitic stainless steel for smart, sustainable engineering.
Recommended Products