SUS329J3L stainless steel chemical composition,applications
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What material is SUS329J3L?
SUS329J3L is a Japanese (JIS) designation for a high-strength, corrosion-resistant duplex stainless steel, similar to AISI 2205 (UNS S32205/S31803), combining ferrite and austenite phases for superior resistance to pitting, crevice corrosion, stress corrosion cracking (SCC), and erosion, making it ideal for chemical plants, desalination, and marine applications.
SUS329J3L stainless steel equivalent material
SUS329J3L is a Japanese duplex stainless steel similar to AISI 2205, with key international equivalents being UNS S31803/S32205, European 1.4462, and ASTM A240/A789 grades (like F51) for duplex applications, offering high strength and excellent corrosion resistance, particularly against chlorides, making it great for chemical/marine uses.
SUS329J3L stainless steel Chemical Composition
| Grade | C≤ | Si≤ | Mn≤ | P≤ | S≤ | Ni | Cr | Mo | N |
| SUS329J3L | 0.030 | 1.00 | 2.00 | 0.040 | 0.030 | 1.50 ～6.50 | 21.00 ~ 24.00 | 2.50 ~ 3.50 | 0.08~0.20 |
SUS329J3L stainless steel Mechanical Property
| Grade | Yield Strength, N/mm² ≥ | Tensile Strength, N/mm² ≥ | Elongation, % ≥ | Hardness (²) | ||
| HB ≤ | HRB ≤ | HV ≤ | ||||
| SUS329J3L | 450 | 620 | 18 | 302 | 32 | 320 |
SUS329J3L stainless steel Physical performance
|
Density (g/cm3) |
Magnetic |
Specific heat (J/g.0C) |
Thermal conductivity 1000C(W/m. 0C) |
Thermal expansion rate 20~1000C (10-6/0C) |
| 7.8 | with | 0.45 | 19.0 |
13.7 |
Is SUS329J3L magnetic?
Due to its duplex microstructure (containing both ferrite and austenite phases), SUS329J3L is partially magnetic. The material may exhibit slight magnetism, but it is generally weaker than that of fully ferritic stainless steels.
What is the corrosion resistance of SUS329J3L stainless steel?
SUS329J3L exhibits excellent corrosion resistance, especially in environments exposed to chlorides and other aggressive agents. The alloy's high content of chromium (24-26%) and molybdenum (3-4%) makes it particularly resistant to pitting, crevice corrosion, and stress corrosion cracking.It is commonly used in seawater applications, chemical processing, and oil and gas production, where traditional stainless steels like 304 or 316 may not provide adequate protection.
How does SUS329J3L perform in high-temperature environments?
SUS329J3L can be used in moderately high-temperature environments, but it is better suited for ambient to moderate temperature applications. The alloy can typically withstand temperatures up to 300°C without losing its structural integrity or corrosion resistance. For higher temperature applications, such as furnaces or gas turbines, other alloys (such as Inconel 625) may be more suitable, as SUS329J3L begins to lose strength and corrosion resistance above 300°C.
What are the welding considerations for SUS329J3L?
SUS329J3L can be welded using conventional welding methods such as MIG, TIG, or manual arc welding. However, special attention is required during the welding process to avoid problems such as stress corrosion cracking (SCC) and hydrogen embrittlement. Low-hydrogen electrodes are recommended, and proper post-weld heat treatment should be performed to relieve stress and maintain the material's integrity.
Which industries use SUS329J3L stainless steel?
Oil and Gas: Subsea pipelines, pressure vessels, and offshore platforms.
Marine: Seawater desalination systems, heat exchangers, and ship components.
Chemical: Piping systems, storage tanks, and reactors exposed to corrosive chemicals.
Power Generation: Turbine components, heat exchangers, and boiler systems.
SUS329J3Lvs. stainless steels 316L or 2205
| Property | SUS329J3L | 316L Stainless Steel | 2205 Duplex Stainless Steel |
|---|---|---|---|
| Tensile Strength | 750 – 950 MPa | 520 – 700 MPa | 620 – 880 MPa |
| Corrosion Resistance | Excellent in chlorides | Good in chlorides | Excellent in chlorides |
| Resistance to Stress Corrosion Cracking (SCC) | Excellent | Moderate | Good |
| Resistance to Pitting | Excellent | Good | Excellent |
If you have project requirements for SUS329J3L stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition and free samples, please contact our factory immediately. We offer competitive prices and excellent service.
