ASTM A240 / JIS G4305 SUS444 Stainless Steel Sheet 0.6 - 3.0mm for Watertank 444 Stainless Steel
444 Stainless steels are high-alloy steels that have excellent corrosion resistance in comparison with other steels as they contain more chromium.
Based on their crystalline structure, stainless steels are divided into three groups, namely, martensitic, austenitic and ferritic steels. A combination of martensitic and ferritic steels forms a fourth group known as precipitation-hardened steels.
SUS444 is a type of ferritic stainless steel. It contains relatively low carbon and nitrogen. Its corrosion resistance is extremely excellent. The content of niobium or titanium is conductive to avoid intergranular corrosion after welding. The greatest advantage of SUS444 is that it has excellent resistance to chloride stress corrosion cracking. Moreover, its resistance to chloride pitting corrosion is superior to that of SUS304 due to high molybdenum content, and is equivalent to that of SUS316L. Accordingly, SUS444 is especially suitable for the application of various water treatment devices.
Chemical compositions of SUS444 (%):
Physical properties of SUS444:
Thermal conductivity 100℃, W/m*K
Thermal expansion 0~100℃, mm/ m*K
Weldability of SUS444:
Welding method: TIG welding, plasma welding, MIG welding and laser welding.
Welding material: SUS444 base metal cutting strips or ER316L. Keep the welding material clean.
Protective gases for welding: argon or mixed gas of argon and helium.
Applications of SUS444:
SUS444 is typically suitable for food processing equipment, heat exchanger, water heater tank, storage tank, solar collector panel and so on.