Founded in 2012, JUNTO Special Steel Company is a core subsidiary of ONETOP Group, focusing on R&D, production and global supply of high-quality steel products, including stainless steel, alloy steel, special steel and chromium-nickel alloys. It has gained a solid global reputation through refined operations over the years.
Supported by ONETOP Group’s resources, JUNTO operates two advanced production bases with leading EAF, AOD and LF refining processes. It enforces strict full-process quality control, holding international certifications such as Nadcap-NDT, ISO, PED, TUV and GOST, meeting global high-end manufacturing standards.
JUNTO’s core strength lies in integrated tech, quality and service. Its chromium-nickel alloys excel in high-temperature and corrosion resistance. Its products are exported to Europe, Americas, Asia-Pacific and the Middle East via an efficient global sales network, offering one-stop services. Adhering to "quality for survival, innovation for development", it strives to be a trusted global special steel partner.
Duplex Steel S32205 seamless pipe is the premium version of duplex 2205, manufactured to UNS S32205 specification with tighter chemical composition controls. With guaranteed minimum nitrogen content and optimized chromium, molybdenum, and nickel levels, S32205 offers enhanced and more consistent corrosion resistance compared to S31803. The seamless construction provides reliable performance for critical applications in aggressive environments.
Typical Applications
Offshore oil & gas production tubing and flowlines
Subsea pipelines and manifolds
Chemical reactor and column cladding
Seawater reverse osmosis (SWRO) high-pressure piping
Heat exchangers in chloride-containing media
FAQ – Duplex Steel S32205 Seamless Pipe
Q1: Why choose S32205 over S31803 for critical applications?
A1: S32205's tighter chemistry specifications, particularly minimum nitrogen content, ensure more consistent pitting corrosion resistance, mechanical properties, and weldability, reducing application risk in critical services.
Q2: What is the typical Critical Pitting Temperature (CPT)?
A2: S32205 typically exhibits CPT ≥ 35°C (95°F) per ASTM G150, making it suitable for most seawater and chloride applications. Actual values depend on specific heat chemistry and processing.
Q3: Can it be used for subsea applications?
A3: Yes, S32205 is widely used for subsea pipelines, manifolds, and Christmas trees due to its combination of strength, corrosion resistance, and compatibility with cathodic protection systems.
Q4: What post-weld heat treatment is required?
A4: Generally, full solution annealing is not required for thin to medium sections if proper welding procedures are followed. For thick sections (>20mm), stress relief at 1100-1125°F (595-605°C) may be specified by certain codes or for dimensional stability.