STEEL SHEET WITH COATING ON ALUMINIUM BASE, HEAT-SHRINKING BAND AND ITS IMPLEMENTATION Russian patent published in 2010 - IPC C22C38/06 C22C38/12 H04N5/645 C23C2/12 

FIELD: metallurgy.

SUBSTANCE: sheet is made out of steel containing not more, than 0.005 wt % C, not more 0.005 wt % N, not less 0.1 wt % and not more 0.5 wt % Si, not more 0.1 wt % P, not more 0.02 wt % S, not less 1.05 wt % and not more 1.3 wt % Mn, not more 1.0 wt % of dissolved Al, Fe and unavoidable impurities the rest or containing not more 0.2 wt % C, not more 0.007 wt % N, not less 0.1 wt % and not more 0.5 wt % Si, not more 0.1 wt % P, not more 0.02 wt % S, not less 1.05 wt % and not more 2.0 wt % Mn, not less 0.01 and not more 0.08 wt % Nb, not more 1.0 wt % of dissolved Al, Fe and unavoidable impurities - the rest. A layer of coating consisting mainly out of aluminium is settled on surface of the sheet. Change of colour and reduction of strength for more, than 10 % of strength before heating are prevented by heating to temperature not less 500°C and not more 700°C during not more, than 900 sec.

EFFECT: high resistance to change of colour at heating and weldability, resistance to decrease of strength.

12 cl, 2 dwg, 4 tbl, 1 ex