At first you choose type of standards.
Choose specific standard.
From the list of materials, which appertaining to selected norm you pick out concrete marking, e.g . "1.2842".
Below you see chemical composition of specific material - on the left and offer of another information.
After activate e.g . "Equivalent" will show list of such material - on the right down.
After activate e.g . "Heat treatment" will show information about heat treatment of this steel.