Discover the superior corrosion resistance and weldability of 445J1/445J2 stainless steel welded pipe. Ideal for coastal buildings, water systems, and exhaust lines. Supplied by SUNNING STEEL with full customization options.
The 445J1 / 445J2 stainless steel welded pipe is a high-performance ferritic stainless steel pipe developed to offer enhanced corrosion resistance—especially against chloride-induced corrosion, oxidation, and pitting. As an improved alternative to traditional 304 and 316 grades, 445J1 / 445J2 is especially well-suited for highly corrosive environments, including coastal, industrial, and humid applications.
Manufactured by SUNNING STEEL, these pipes are precision welded and comply with international quality standards. The material composition makes it an excellent choice for structural and fluid transport systems that demand long-term durability with lower maintenance costs.
| Parameter | Details |
| Grade | SUS 445J1 / 445J2 / JIS G3448 / ASTM Equivalent Available |
| Product Type | Welded Pipe |
| Outer Diameter Range | 15 mm – 600 mm |
| Wall Thickness | 0.5 mm – 10 mm |
| Pipe Length | 6 meters standard (customizable) |
| Surface Finish | 2B, BA, No.1, Polished, Pickled |
| Standards | JIS, ASTM, GB, EN |
| Form | Round pipe (square/rectangular on request) |
| Property | Value |
| Density | 7.75 g/cm³ |
| Thermal Conductivity (100°C) | ~25 W/m·K |
| Specific Heat (20°C) | ~460 J/kg·K |
| Coefficient of Expansion | 10.8 × 10⁻⁶ /°C |
| Electrical Resistivity | ~0.65 µΩ·m |
445J1 / 445J2’s thermal and expansion properties are stable across a wide range of temperatures, making it ideal for applications with thermal cycling or heat exposure.
445J1 / 445J2 provides superior resistance to pitting and chloride stress corrosion compared to 304, especially in salt-rich or coastal environments. It also offers a longer lifespan in hot water systems and industrial pipelines.
Yes. With titanium stabilization and low carbon content, 445J1 / 445J2 has good weldability and resists intergranular corrosion post-welding.
While 445J1 / 445J2 shows excellent corrosion resistance, for highly acidic applications, austenitic grades like 316L may be more suitable. Please consult SUNNING STEEL for specific environmental compatibility.
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