Effects of aluminum on the physical, chemical and process properties of steel

① When aluminum is added to Fe-Cr alloy, its resistance temperature coefficient can be reduced and it can be used as electric heating alloy material.

Electrothermal alloy wire

(2) Aluminum and silicon have similar effects on reducing the core loss of transformer steel.

③ When the content of aluminum reaches a certain value, the surface of steel is passivated, which makes the steel have corrosion resistance in oxidizing acid and improve the corrosion resistance to hydrogen sulfide. Aluminum is bad for corrosion resistance of steel in chlorine and chloride atmospheres.

④ Aluminum nitride layer is formed on the surface of aluminized steel after nitriding, which can improve the hardness and fatigue strength and wear resistance.

⑤ Aluminum, as an alloying element, can significantly improve the oxidation resistance of steel. Aluminum plating or aluminizing on the surface of steel can improve its oxidation resistance and corrosion resistance, and can be used in the manufacture of solar water heaters, etc.

Aluminum has an adverse effect on thermal working performance, weldability and machinability.