JIS G4305 SUS304L Steel Plate | 304L Stainless Steel
What is JIS G4305 SUS304L Steel Plate?
As a professional stainless steel supplier and China Mill-Direct Exporter, SHH STEEL is pleased to present JIS G4305 SUS304L Steel Plate (also known as 304L stainless steel).
SUS304L is the low-carbon version of SUS304 under the Japanese standard JIS G4305 for cold-rolled stainless steel plates, sheets and strips. With a maximum carbon content of 0.030%, it offers significantly improved resistance to intergranular corrosion after welding while retaining the excellent corrosion resistance, formability and toughness of the standard 304 grade. SUS304L is the preferred choice for heavy welded structures, chemical equipment, pressure vessels and applications where post-weld heat treatment is not practical.
SHH STEEL supplies SUS304L as Mill Direct Supply, sourcing directly from major Chinese stainless steel mills. This ensures competitive mill pricing, consistent quality, shorter lead times and full traceability. We offer thicknesses from 0.3 mm to 6.0 mm (thicker plates available on request), widths up to 1500 mm or more, in coil or cut-to-length form. All materials are delivered with full Mill Test Certificates.
Material Specification
| Specification Element | Requirement | SHH STEEL Compliance |
|---|---|---|
| Primary Standard | JIS G4305 | Full compliance |
| Steel Grade | SUS304L | Confirmed |
| Product Form | Cold-rolled Plate / Sheet / Coil | Available |
| Surface Finish | 2B, BA, No.4, HL, polished (common) | Available |
| Thickness Range | 0.3 mm – 6.0 mm (standard) | Custom sizes available |
| Width | Up to 1500 mm or wider | Available |
| Certification | EN 10204 3.1 / Mill Certificate | Available |
Chemical Composition
Chemical composition according to JIS G4305 (Heat Analysis):
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.030 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 18.00 – 20.00 |
| Nickel (Ni) | 9.00 – 13.00 |
| Nitrogen (N) | ≤ 0.10 |
Note: The very low carbon content (≤ 0.030%) is the defining feature of SUS304L, providing excellent resistance to intergranular corrosion after welding.
Mechanical Properties
Mechanical properties of JIS G4305 SUS304L (annealed condition):
| Property | Value |
|---|---|
| Yield Strength (0.2%) | ≥ 175 MPa |
| Tensile Strength | ≥ 480 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 187 HB / ≤ 90 HRB |
Density: Approximately 7.93 g/cm³ Magnetic: Non-magnetic in annealed condition; may become slightly magnetic after heavy cold working.
Surface Finishes
| Finish | Description | Typical Applications |
|---|---|---|
| 2B | Cold-rolled, annealed, pickled, skin-passed | General fabrication, industrial |
| BA | Bright Annealed – high reflectivity | Kitchen, decorative, clean rooms |
| No.4 | Brushed finish | Architectural, elevators, kitchen |
| HL | Hairline finish | Decorative panels |
| Polished | Mirror or custom polish | High-end decorative and food equipment |
Delivery Conditions
SHH STEEL supplies JIS G4305 SUS304L as Mill Direct Supply in annealed condition with various surface finishes.
Additional options available:
- Coil or cut-to-length sheets/plates
- Protective film
- Third-party inspection (SGS, BV, TUV, etc.)
Key Characteristics
- Excellent resistance to intergranular corrosion after welding
- Outstanding general corrosion resistance
- Superior weldability compared with standard SUS304
- Excellent formability and deep-drawing capability
- Good toughness at low temperatures
- Non-magnetic in annealed condition
- Ideal for heavy welded structures and chemical equipment
Equivalent Material Grades
| Grade | Standard | Notes |
|---|---|---|
| SUS304L | JIS G4305 | — |
| 304L | ASTM A240 | American equivalent |
| 1.4306 / 1.4307 | EN 10088-2 | European equivalents |
| 022Cr19Ni10 | GB/T 3280 | Chinese equivalent |
| UNS S30403 | — | Unified Numbering System |
Applications
JIS G4305 SUS304L is widely used in applications requiring excellent weldability and corrosion resistance. Typical applications include:
| Application Area | Typical Components / Uses (Keywords) |
|---|---|
| Chemical & Petrochemical | Tanks, vessels, pipes, reactors – 304L Chemical |
| Food & Pharmaceutical | Processing equipment, storage tanks – 304L Food |
| Pressure Vessels | Welded pressure equipment – 304L Pressure Vessel |
| Architectural & Construction | Welded structural components – 304L Construction |
| Heat Exchangers | Shells, tubesheets, components – 304L Heat Exchanger |
| General Fabrication | Heavy welded structures – 304L Fabrication |
Why Choose SHH STEEL
SHH STEEL provides SUS304L as Mill Direct Supply. We maintain long-term strategic cooperation with major Chinese stainless steel mills and act as a first-level agent. This direct mill supply model allows us to offer competitive mill-direct pricing, faster delivery times, consistent quality, and full Mill Test Certificates for JIS G4305 SUS304L Steel Plate.
Customers benefit from reliable supply, short lead times and cost-effective solutions for low-carbon austenitic stainless steel projects requiring superior weldability. Our professional export team provides technical support on material selection, welding and processing.
FAQ
- What is the main advantage of SUS304L over SUS304?SUS304L has much lower carbon content, which provides excellent resistance to intergranular corrosion after welding. It is the preferred grade for heavy welded structures.
- Is SUS304L magnetic?In the annealed condition it is non-magnetic. After heavy cold working it may become slightly magnetic
- Can SUS304L replace 304 in all applications?In most cases yes, especially where welding is involved. Mechanical properties are slightly lower than standard 304, but still fully adequate for the vast majority of applications.
Conclusion
JIS G4305 SUS304L Steel Plate (304L Stainless Steel) from SHH STEEL is a low-carbon austenitic stainless steel offering excellent corrosion resistance, superior weldability and outstanding formability. As Mill Direct Supply, we provide competitive pricing, consistent quality and full technical support. Trust SHH STEEL for your SUS304L stainless steel requirements.
Contact SHH STEEL today for stock availability, pricing and technical support. JIS G4305 SUS304L Steel Plate, SUS304L, 304L stainless steel, 304L stainless steel plate, SUS304L supplier
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