Steel for enamel heat transfer element having corrosion resistance and manufacturing method thereof

The invention discloses steel for an enamel heat transfer element having corrosion resistance and a manufacturing method thereof. The steel comprises the following chemical components in percentage by weight: not more than 0.010% of C, 0.40-0.60% of Mn, not more than 0.10% of Si, not more than 0.02% of P, not more than 0.02% of S, 0.02-0.06% of Als, 0.20-0.40% of Cu, 0.70-1.10% of Cr, 0.04-0.10% of Sb, 0.02-0.05% of Ti, 0.01-0.03% of Nb, 0.01-0.03% of Ni, and the balance of Fe and inevitable impurities. As such elements as Cu, Cr, Ni, Sb and Ti are added to the steel, the metal corrosion potential is deviated to a passivation area, a compact protective film is easy to be formed on the surface, the steel is excellent in corrosion resistance in a smoke environment, and the corrosion resistance is obviously better than that of a general low-carbon steel plate; and as the contents of C and Si in the steel are reduced and such proper alloy elements as Nb and Ti are added in the steel, the microstructure is reasonably controlled, the enamel coating quality of the steel plate is effectively improved, the steel plate can be applied to the surface enamel coating production, and such surface defect problems as enamel scale explosion, foaming and pinholes easily generated in traditional acid-resistant steel are solved.