Yield strength 500 MPa class high elongation aluminum zinc hot-dip / color-plated steel sheet and method for producing the same

摘要

Substrate chemical weight percentage, C: 0.07% to 0.15%, Si: 0.02% to 0.15%, Mn: 1.3% to 1.8%, S ≦ 0.01%, N ≦ 0.004%, Ti ≦ 0.15%, Nb ≦ 0.050% The balance is Fe and inevitable impurities, and simultaneously satisfies the following conditions, yield strength is ≧ 500 MPa, tensile strength is ≧ 550 MPa, elongation is ≧ 15%, and good toughness Yield strength 500 MPa class high elongation aluminum zinc hot dip / color plated steel plate with excellent corrosion resistance and manufacturing method thereof. (C + Mn / 6) ≧ 0.3%; when Ti is not contained, Nb satisfies 0.01% ≦ (Nb-0.22C-1.1N) ≦ 0.05%; when Nb is not contained, Ti is 0.5 ≦ Ti / C ≦ 1.5 is satisfied; when Ti and Nb are added together, 0.04% ≦ (Ti + Nb) ≦ 0.2%.