The yield strength of SUS444 is 1.5 times as high as that of carbon steel and 6 times as high as that of glass fiber reinforced plastics. SUS444 has outstanding advantages in earthquake resistance, snow resistance, wind pressure resistance and impact resistance. SUS 444 ferritic stainless steel has high thermal conductivity, which is about 130%-150% of Cr-Ni austenitic stainless steel. It is very suitable for heat exchange. The coefficient of thermal expansion is small, the small unit is only 60%-70% of chromium-nickel austenitic stainless steel, which is very suitable for use under the conditions of hot swelling, cold shrinkage and thermal cycle. The steel has good plasticity and toughness. It is suitable for drawing, rolling and punching. Especially the application corrosion resistance is the most excellent, in the high chloride medium corrosion resistance is superior to ordinary ferritic stainless steel and austenitic stainless steel, generally does not produce chloride stress corrosion cracking. After adding Ni, Ti, Mo and other elements, the performance of pitting corrosion and crevice corrosion is improved. The steel can be welded by means of welding ordinary stainless steel. This kind of steel is especially suitable for food processing equipment, heat exchanger, water heater tank, water storage tank, solar collector panel, anti-theft window screen, etc.
SSUS444 (00Cr18Mo2) is a super low carbon nitrogen, 18% chromium and 2% molybdenum, high corrosion resistant ferrite stainless steel. The steel is usually stabilized with niobium or titanium to avoid intergranular corrosion after welding. The steel is especially suitable for various water treatment devices.
SUS444 steel belongs to high alloy ferrite stainless steel, compared with the commonly used steel SUS430:
1. The content of chromium is about 1.0% higher and the alloy element Mo is added. Therefore, the steel has good resistance to pitting corrosion, crevice corrosion and stress corrosion, and its corrosion resistance is even better than SUS304 and SUS316 in some fields.
2. Stabilizing elements such as Ti, Nb and Zr are added, so the steel has good intergranular corrosion resistance and high temperature oxidation resistance.
Carbon C: less than 0.025
Silicon Si: less than 1
Mn Mn: less than 1
Sulfur S: less than 0.030
Phosphorus P: less than 0.040
Nickel Ni: (less than 0.60)
Nitrogen N: less than 0.025
Titanium + Nb + Zr Ti+Nb+Zr:=8*C = 0.8
SUS444 has ultra-low carbon and nitrogen impurity elements.
SUS444 added molybdenum element to increase the resistance to spot corrosion.
SUS444 added NB or Ti with stabilizing effect.