JIS G4305 SUS434 Steel Plate | 434 BA/2B Stainless Steel
What is JIS G4305 SUS434 Steel Plate?
As a professional stainless steel supplier and China Mill-Direct Exporter, SHH STEEL is pleased to present JIS G4305 SUS434 Steel Plate (also known as 434 stainless steel).
SUS434 is a ferritic stainless steel under the Japanese standard JIS G4305 for cold-rolled stainless steel plates, sheets and strips. It is based on the 430 composition but contains an addition of molybdenum (approximately 0.75–1.25%), which significantly improves resistance to pitting corrosion and general corrosion in chloride-containing environments compared with standard SUS430. It remains fully magnetic, offers good formability and is more cost-effective than many austenitic grades. The most common surface finishes are 2B and BA.
SHH STEEL supplies SUS434 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 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 | SUS434 | Confirmed |
| Product Form | Cold-rolled Plate / 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 | Available |
| Certification | EN 10204 3.1 / Mill Certificate | Available |
Chemical Composition
Chemical composition according to JIS G4305 (Heat Analysis):
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.12 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 16.00 – 18.00 |
| Molybdenum (Mo) | 0.75 – 1.25 |
| Nickel (Ni) | ≤ 0.60 |
Note: The addition of molybdenum is the key feature that improves pitting corrosion resistance compared with standard SUS430.
Mechanical Properties
Mechanical properties of JIS G4305 SUS434 (annealed condition):
| Property | Value |
|---|---|
| Yield Strength (0.2%) | ≥ 205 MPa |
| Tensile Strength | ≥ 450 MPa |
| Elongation | ≥ 22% |
| Hardness | ≤ 183 HB |
Density: Approximately 7.70 g/cm³ Magnetic: Yes (ferritic)
Surface Finishes
| Finish | Description | Typical Applications |
|---|---|---|
| 2B | Cold-rolled, annealed, pickled, skin-passed – smooth matte finish | General fabrication, industrial use |
| BA | Bright Annealed – high reflectivity | Decorative and clean applications |
SHH STEEL mainly supplies 2B and BA finishes for SUS434.
Delivery Conditions
SHH STEEL supplies JIS G4305 SUS434 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
- Improved pitting and general corrosion resistance due to molybdenum addition
- Better performance than SUS430 in mildly chloride-containing environments
- Fully magnetic
- Good formability
- Cost-effective alternative to 316 in some mild applications
- Excellent oxidation resistance
Equivalent Material Grades
| Grade | Standard | Notes |
|---|---|---|
| SUS434 | JIS G4305 | — |
| 434 | ASTM A240 | American equivalent |
| 1.4113 / X6CrMo17-1 | EN 10088-2 | European equivalent |
| 10Cr17Mo | GB/T 3280 | Chinese equivalent |
| UNS S43400 | — | Unified Numbering System |
Applications
JIS G4305 SUS434 (434 BA/2B) is used in applications requiring better corrosion resistance than standard 430. Typical applications include:
| Application Area | Typical Components / Uses (Keywords) |
|---|---|
| Automotive | Exhaust systems, trim, decorative parts – 434 Automotive |
| Kitchen & Appliance | Higher-end kitchen equipment – 434 BA Kitchen |
| Architectural & Decorative | Exterior and interior panels – 434 BA Decorative |
| Industrial Equipment | Parts exposed to mild chloride environments – 434 Industrial |
| General Fabrication | Formed and stamped components – 434 Fabrication |
| Heat-Resistant Applications | Moderate temperature service – 434 Heat Resistant |
Why Choose SHH STEEL
SHH STEEL provides SUS434 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 SUS434 Steel Plate.
Customers benefit from reliable supply, short lead times and cost-effective solutions for molybdenum-bearing 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 SUS434 over SUS430?SUS434 contains molybdenum, which significantly improves resistance to pitting corrosion and general corrosion in chloride-containing environments.
- What is the difference between 2B and BA finish?2B is a smooth matte finish for general fabrication. BA is bright annealed with higher reflectivity for decorative applications.
Conclusion
JIS G4305 SUS434 Steel Plate (434 BA/2B Stainless Steel) from SHH STEEL is a molybdenum-bearing ferritic stainless steel offering improved corrosion resistance over standard 430, good formability and attractive surface finishes. As Mill Direct Supply, we provide competitive pricing, consistent quality and full technical support. Trust SHH STEEL for your SUS434 stainless steel requirements.
Contact SHH STEEL today for stock availability, pricing and technical support. JIS G4305 SUS434 Steel Plate, SUS434, 434 BA, 434 2B, 434 stainless steel plate, SUS434 supplier
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