Very good resistance to sulphurous gases and salts. Good resistance to oxidation in air. Good resistance to oil ash corrosion, molten copper, lead, tin. In sulphurous reducing atmosphere 446 performs better than austenitic steels, although Nitrogen concentrations can result in early failure. Hot gases containing hydrocarbons and carbon monoxide can cause carburisation, if oxygen is present for an oxide layer to form 446 performs well, otherwise failure occurs quickly.
Basic Composition: Cr 26.5%, Mn 0.8%, Si 0.5%, N 0.2%, C 0.2% Max, P 0.03 Max, S 0.15 Max, Bal Fe
Temperature Limits: 1100 ° C in air and oxidising conditions
International Standards: 1.4749, 446-1
Density: 7.6 g/cm³
Specific Heat: 460 rising to 670 J/Kg ° C
Coefficient of Expansion: 13.5 x10-6 / ° C
Thermal Conductivity: 17 rising to 28 W/m ° C
Peak Sensors Colour Code: Blue