JIS G4305 SUS347 Steel Plate | 347 Stainless Steel
What is JIS G4305 SUS347 Steel Plate?
As a professional stainless steel supplier and China Mill-Direct Exporter, SHH STEEL is pleased to present JIS G4305 SUS347 Steel Plate, also known as 347 stainless steel.
JIS G4305 SUS347 is a niobium-stabilized austenitic stainless steel under the Japanese standard for cold-rolled stainless steel plates, sheets and strips. The addition of niobium (columbium) effectively stabilizes carbon and prevents chromium carbide precipitation, giving SUS347 stainless steel outstanding resistance to intergranular corrosion after welding or prolonged exposure to high temperatures. Compared with titanium-stabilized grades, niobium provides more stable high-temperature performance. JIS G4305 SUS347 is widely used in high-temperature chemical, petrochemical and exhaust applications. SHH STEEL supplies high-quality SUS347 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 | SUS347 | Confirmed |
| Product Form | Cold-rolled Plate / Sheet / Coil | Available |
| Surface Finish | 2B, BA, No.4, HL, polished | 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 |
JIS G4305 SUS347 steel plate is available in various thicknesses and finishes to meet the requirements of high-temperature and welded 347 stainless steel applications.
Chemical Composition
Chemical composition of JIS G4305 SUS347 (Heat Analysis):
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 17.00 – 19.00 |
| Nickel (Ni) | 9.00 – 13.00 |
| Niobium (Nb) | ≥ 10 × C% |
The niobium addition in SUS347 stainless steel provides highly effective stabilization against intergranular corrosion, which is the key advantage of JIS G4305 SUS347 in high-temperature welded service.
Mechanical Properties
Mechanical properties of JIS G4305 SUS347 (annealed condition):
| Property | Value |
|---|---|
| Yield Strength (0.2%) | ≥ 205 MPa |
| Tensile Strength | ≥ 520 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 187 HB |
JIS G4305 SUS347 stainless steel maintains good strength and excellent toughness, making 347 stainless steel plate suitable for both fabrication and elevated-temperature service.
Density: Approximately 7.93 g/cm³ Magnetic: Non-magnetic in annealed condition.
Surface Finishes
| Finish | Description | Typical Applications |
|---|---|---|
| 2B | Cold-rolled, annealed, pickled, skin-passed | General industrial use of SUS347 |
| BA | Bright Annealed | Clean and decorative 347 applications |
| No.4 | Brushed finish | Architectural 347 stainless steel |
| HL | Hairline finish | Decorative panels |
| Polished | Mirror or custom polish | High-end 347 stainless steel products |
SHH STEEL provides JIS G4305 SUS347 steel plate in multiple surface finishes to suit both functional and aesthetic requirements of 347 stainless steel projects.
Delivery Conditions
SHH STEEL supplies JIS G4305 SUS347 as Mill Direct Supply in annealed condition with various surface finishes.
Additional options available for SUS347 stainless steel:
- Coil or cut-to-length sheets/plates
- Protective film
- Third-party inspection (SGS, BV, TUV, etc.)
Key Characteristics
- Excellent resistance to intergranular corrosion due to niobium stabilization in SUS347
- Superior high-temperature strength and oxidation resistance of 347 stainless steel
- Reliable weldability of JIS G4305 SUS347 without risk of sensitization
- Better high-temperature stability compared with titanium-stabilized grades
- Suitable for continuous service up to approximately 900°C
- Non-magnetic in annealed condition
- Good formability and toughness of 347 stainless steel plate
Equivalent Material Grades
| Grade | Standard | Notes |
|---|---|---|
| SUS347 | JIS G4305 | — |
| 347 | ASTM A240 | American equivalent |
| 1.4550 / X6CrNiNb18-10 | EN 10088-2 | European equivalent |
| 06Cr18Ni11Nb | GB/T 3280 | Chinese equivalent |
| UNS S34700 | — | Unified Numbering System |
JIS G4305 SUS347 is fully equivalent to international 347 stainless steel grades and is widely accepted in global high-temperature and welded projects.
Applications
JIS G4305 SUS347 (347 Stainless Steel) is widely used in high-temperature and welded applications. Typical uses include:
| Application Area | Typical Components / Uses (Keywords) |
|---|---|
| High-Temperature Equipment | Exhaust systems, furnace parts – SUS347 High Temperature |
| Chemical & Petrochemical | Reactors, heat exchangers, piping – 347 Chemical |
| Aerospace & Automotive | Exhaust components, manifolds – 347 Aerospace |
| Heat Treatment Equipment | Fixtures, trays, radiant tubes – 347 Heat Treatment |
| Power Generation | Boiler components, superheaters – 347 Power |
| General Fabrication | Welded high-temperature structures – 347 Fabrication |
Why Choose SHH STEEL
SHH STEEL provides JIS G4305 SUS347 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 SUS347 Steel Plate.
Customers benefit from reliable supply of high-quality 347 stainless steel, short lead times and professional technical support for SUS347 projects worldwide.
FAQ
- What is the main advantage of SUS347 over SUS321?Both are stabilized grades, but JIS G4305 SUS347 uses niobium stabilization, which generally provides better high-temperature stability and performance than the titanium-stabilized SUS321.
- What is the difference between SUS347 and SUS304?SUS347 is niobium-stabilized, offering excellent resistance to intergranular corrosion after welding and superior high-temperature performance compared with standard 304 stainless steel.
- Is SUS347 magnetic?347 stainless steel is non-magnetic in the annealed condition. It may become slightly magnetic after heavy cold working.
Conclusion
JIS G4305 SUS347 Steel Plate (347 Stainless Steel) from SHH STEEL is a niobium-stabilized austenitic stainless steel offering excellent intergranular corrosion resistance, superior high-temperature performance and reliable weldability. As Mill Direct Supply, we provide competitive pricing, consistent quality and full technical support. Trust SHH STEEL for your SUS347 stainless steel requirements.
Contact SHH STEEL today for stock availability, pricing and technical support. JIS G4305 SUS347 Steel Plate, SUS347, 347 stainless steel, 347 stainless steel plate, SUS347 supplier
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