JIS G4305 SUS329J3L Steel Plate | 329J3L Stainless Steel
What is JIS G4305 SUS329J3L Steel Plate?
As a professional stainless steel supplier and China Mill-Direct Exporter, SHH STEEL is pleased to present JIS G4305 SUS329J3L Steel Plate, also known as 329J3L stainless steel.
JIS G4305 SUS329J3L is a duplex stainless steel (austenitic-ferritic) under the Japanese standard for cold-rolled stainless steel plates, sheets and strips. It features a balanced microstructure of approximately 50% austenite and 50% ferrite, delivering nearly twice the yield strength of standard austenitic grades such as 304 or 316, together with outstanding resistance to stress corrosion cracking, pitting and crevice corrosion. SUS329J3L stainless steel is widely recognized as the Japanese equivalent of the popular 2205 duplex grade and is extensively used in chemical processing, oil & gas, marine and desalination applications. SHH STEEL supplies high-quality JIS G4305 SUS329J3L as Mill Direct Supply from leading Chinese stainless steel mills.
Material Specification
| Specification Element | Requirement | SHH STEEL Compliance |
|---|---|---|
| Primary Standard | JIS G4305 | Full compliance |
| Steel Grade | SUS329J3L | Confirmed |
| Product Form | Cold-rolled / Hot-rolled Plate, Sheet, Coil | Available |
| Surface Finish | 2B, No.1, pickled, polished | Available |
| Thickness Range | 0.5 mm – 50 mm (typical) | Custom sizes available |
| Width | Up to 1500 mm or wider | Available |
| Certification | EN 10204 3.1 / Mill Certificate | Available |
JIS G4305 SUS329J3L steel plate is available in a wide range of thicknesses to meet the requirements of high-strength and highly corrosive 329J3L stainless steel applications.
Chemical Composition
Chemical composition of JIS G4305 SUS329J3L (Heat Analysis – typical):
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.030 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 21.00 – 24.00 |
| Nickel (Ni) | 4.50 – 6.50 |
| Molybdenum (Mo) | 2.50 – 3.50 |
| Nitrogen (N) | 0.08 – 0.20 |
The balanced Cr-Ni-Mo-N composition of SUS329J3L stainless steel produces the characteristic duplex microstructure and high PREN value that give JIS G4305 SUS329J3L its excellent corrosion resistance.
Mechanical Properties
Mechanical properties of JIS G4305 SUS329J3L (typical annealed condition):
| Property | Value |
|---|---|
| Yield Strength (0.2%) | ≥ 450 MPa |
| Tensile Strength | ≥ 620 MPa |
| Elongation | ≥ 25% |
| Hardness | ≤ 290 HB |
JIS G4305 SUS329J3L stainless steel offers significantly higher strength than conventional austenitic grades, allowing lighter designs while maintaining excellent toughness of 329J3L stainless steel plate.
Density: Approximately 7.80 g/cm³ Magnetic: Partially magnetic due to the ferritic phase.
Surface Finishes
| Finish | Description | Typical Applications |
|---|---|---|
| 2B | Cold-rolled, annealed, pickled, skin-passed | General fabrication of SUS329J3L |
| No.1 | Hot-rolled, annealed and pickled | Thicker 329J3L plates |
| Pickled | Acid-cleaned surface | Industrial applications |
| Polished | Custom polish | Higher-end 329J3L stainless steel products |
SHH STEEL provides JIS G4305 SUS329J3L steel plate in practical industrial finishes suitable for most 329J3L stainless steel projects.
Delivery Conditions
SHH STEEL supplies JIS G4305 SUS329J3L as Mill Direct Supply in solution-annealed condition.
Additional options available for SUS329J3L stainless steel:
- Coil or cut-to-length plates
- Protective film or packaging
- Third-party inspection (SGS, BV, TUV, etc.)
Key Characteristics
- High strength — approximately twice the yield strength of 304/316
- Excellent resistance to stress corrosion cracking in chloride environments
- Superior pitting and crevice corrosion resistance of SUS329J3L
- Good weldability of JIS G4305 SUS329J3L with proper procedures
- High PREN value (typically ≥ 33–35)
- Cost-effective alternative to higher-alloy austenitic grades
- Partially magnetic due to duplex microstructure of 329J3L stainless steel
Equivalent Material Grades
| Grade | Standard | Notes |
|---|---|---|
| SUS329J3L | JIS G4305 / G4304 | — |
| 2205 / S32205 | ASTM A240 | Closest American equivalent |
| 1.4462 / X2CrNiMoN22-5-3 | EN 10088-2 | European equivalent |
| 022Cr22Ni5Mo3N | GB/T 3280 | Chinese equivalent |
| UNS S32205 / S31803 | — | Unified Numbering System |
JIS G4305 SUS329J3L is widely accepted as the Japanese counterpart to the global 2205 duplex stainless steel grade.
Applications
JIS G4305 SUS329J3L (329J3L Stainless Steel) is widely used in high-strength and highly corrosive applications. Typical uses include:
| Application Area | Typical Components / Uses (Keywords) |
|---|---|
| Oil & Gas / Offshore | Pipelines, manifolds, separators – SUS329J3L Oil Gas |
| Chemical Processing | Reactors, tanks, heat exchangers – 329J3L Chemical |
| Desalination & Water Treatment | Pressure vessels, piping – 329J3L Desalination |
| Marine & Shipbuilding | Seawater systems, structural parts – 329J3L Marine |
| Pulp & Paper | Digesters, bleaching equipment – 329J3L Pulp Paper |
| General Fabrication | High-strength corrosive-service structures – 329J3L Fabrication |
Why Choose SHH STEEL
SHH STEEL provides JIS G4305 SUS329J3L 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 SUS329J3L Steel Plate.
Customers benefit from reliable supply of high-quality 329J3L duplex stainless steel, short lead times and professional technical support for SUS329J3L projects worldwide.
FAQ
- Is SUS329J3L the same as 2205 duplex?Yes. JIS G4305 SUS329J3L is the Japanese designation for the duplex stainless steel that is essentially equivalent to ASTM 2205 (UNS S32205 / S31803).
- What is the main advantage of SUS329J3L over 316L?SUS329J3L offers approximately twice the yield strength and significantly better resistance to stress corrosion cracking and pitting corrosion compared with 316L stainless steel.
- Can you supply SUS329J3L in coil form?Yes, SHH STEEL supplies JIS G4305 SUS329J3L in both coil and cut-to-length plate form depending on thickness.
Conclusion
JIS G4305 SUS329J3L Steel Plate (329J3L Stainless Steel) from SHH STEEL is a high-performance duplex stainless steel offering high strength, excellent stress corrosion cracking resistance and superior pitting resistance. As Mill Direct Supply, we provide competitive pricing, consistent quality and full technical support. Trust SHH STEEL for your SUS329J3L stainless steel requirements.
Contact SHH STEEL today for stock availability, pricing and technical support. JIS G4305 SUS329J3L Steel Plate, SUS329J3L, 329J3L stainless steel, 329J3L duplex, SUS329J3L supplier
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