High-strength and high-plasticity hot-rolled strip steel with high weather resistance and manufacturing method therefor

Abstract

The present invention discloses a hot-rolled strip steel and manufacturing method therefor. The hot-rolled strip steel comprises the following components in mass percentage: C: 0.04-0.09%, Si≤0.50%, Mn: 0.10-1.50%, P≤0.03%, S≤0.01%, Al≤0.60%, Cr: 1.5-4.5%, Cu: 0.10-0.60%, Ti: 0.05-0.18%, Ni≤0.30%, Nb≤0.06%, N≤0.008%, and the balance being Fe and inevitable impurities, and the hot-rolled strip steel further satisfies: 2Mn+Cr≤6%, with element symbols being substituted with mass percentages of corresponding chemical elements in the hot-rolled strip steel for calculation. The present invention shows excellent resistance to atmospheric corrosion and mechanical properties.

Dependencies are inferred from the claim text.