JIS G4305 SUS405 Steel Sheet | 405 BA/2B Stainless Steel
What is JIS G4305 SUS405 Steel Sheet?
As a professional stainless steel supplier and China Mill-Direct Exporter, SHH STEEL is pleased to present JIS G4305 SUS405 Steel Sheet (also known as 405 stainless steel).
SUS405 is a ferritic stainless steel under the Japanese standard JIS G4305 for cold-rolled stainless steel plates, sheets and strips. It contains approximately 12% chromium and a small addition of aluminum, which helps prevent hardening during welding and cooling. This makes SUS405 particularly suitable for applications requiring good weldability in the ferritic family. It offers moderate corrosion resistance, excellent oxidation resistance at elevated temperatures, and is fully magnetic. The most common surface finishes are 2B and BA.
SHH STEEL supplies SUS405 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 3.0 mm, widths up to 1500 mm, in coil or cut-to-length sheet 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 | SUS405 | Confirmed |
| Product Form | Cold-rolled Sheet / Coil | Available |
| Surface Finish | 2B, BA (main) | Available |
| Thickness Range | 0.3 mm – 3.0 mm | Custom sizes available |
| Width | Up to 1500 mm | Slit edge available |
| Certification | EN 10204 3.1 / Mill Certificate | Available |
Chemical Composition
Chemical composition according to JIS G4305 (Heat Analysis):
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 11.50 – 14.50 |
| Aluminum (Al) | 0.10 – 0.30 |
| Nickel (Ni) | ≤ 0.60 |
Note: The aluminum addition is the key feature that improves resistance to hardening and enhances weldability compared with standard 12% Cr ferritic grades.
Mechanical Properties
Mechanical properties of JIS G4305 SUS405 (annealed condition):
| Property | Value |
|---|---|
| Yield Strength (0.2%) | ≥ 175 MPa |
| Tensile Strength | ≥ 410 MPa |
| Elongation | ≥ 20% |
| Hardness | ≤ 183 HB |
Density: Approximately 7.75 g/cm³ Magnetic: Yes (ferritic)
Surface Finishes
| Finish | Description | Typical Applications |
|---|---|---|
| 2B | Cold-rolled, annealed, pickled, skin-passed – smooth matte finish | General fabrication, industrial parts |
| BA | Bright Annealed – high reflectivity | Decorative and clean applications |
SHH STEEL mainly supplies 2B and BA finishes for SUS405.
Delivery Conditions
SHH STEEL supplies JIS G4305 SUS405 as Mill Direct Supply in cold-rolled annealed condition with 2B or BA finish.
Additional options available:
- Coil or cut-to-length sheets
- Protective film
- Third-party inspection (SGS, BV, TUV, etc.)
Key Characteristics
- Good weldability among ferritic stainless steels (thanks to Al addition)
- Excellent resistance to oxidation at high temperatures
- Moderate corrosion resistance in mild atmospheres
- Fully magnetic
- Lower cost than austenitic grades
- Not recommended for highly corrosive chloride environments
Equivalent Material Grades
| Grade | Standard | Notes |
|---|---|---|
| SUS405 | JIS G4305 | — |
| 405 | ASTM A240 | American equivalent |
| 1.4002 / X6CrAl13 | EN 10088-2 | European equivalent |
| 0Cr13Al / 06Cr13Al | GB/T 3280 | Chinese equivalent |
| UNS S40500 | — | Unified Numbering System |
Applications
JIS G4305 SUS405 (405 BA/2B) is commonly used where good weldability and oxidation resistance are required. Typical applications include:
| Application Area | Typical Components / Uses (Keywords) |
|---|---|
| Heat-Resistant Applications | Furnace parts, heat exchangers – 405 Heat Resistant |
| Automotive | Exhaust components, heat shields – 405 Automotive |
| Industrial Equipment | Quenching racks, annealing boxes – 405 Industrial |
| Kitchen & Appliance | Certain formed parts – 405 Fabrication |
| General Fabrication | Welded structures needing ferritic stainless – 405 Welding |
Why Choose SHH STEEL
SHH STEEL provides SUS405 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 surface quality (especially for BA and 2B finishes), and full Mill Test Certificates for JIS G4305 SUS405 Steel Sheet.
Customers benefit from reliable supply, short lead times and cost-effective solutions for ferritic stainless steel projects. Our professional export team provides technical support on material selection, surface finishes and processing.
FAQ
- What is the main advantage of SUS405 over SUS430?SUS405 has added aluminum, which significantly improves weldability and reduces the tendency to harden during cooling after welding.
- s SUS405 magnetic?Yes, it is a ferritic stainless steel and is fully magnetic.
- What is the difference between 2B and BA finish?2B is a smooth matte finish for general use. BA is bright annealed with higher reflectivity for more decorative or clean applications.
- Can you supply SUS405 in coil form?Yes, both coil and cut-to-length sheets are available.
Conclusion
JIS G4305 SUS405 Steel Sheet (405 BA/2B Stainless Steel) from SHH STEEL is a weldable ferritic stainless steel offering good oxidation resistance and cost efficiency. As Mill Direct Supply, we provide competitive pricing, consistent quality and full technical support. Trust SHH STEEL for your SUS405 stainless steel requirements.
Contact SHH STEEL today for stock availability, pricing and technical support. JIS G4305 SUS405 Steel Sheet, SUS405, 405 BA, 405 2B, 405 stainless steel sheet, SUS405 supplier
Quality Steel Needed? Inquire for Offers
Related Products
