Intellectual Property India Publishes Patent Application for Hot-Rolled Steel Sheet And Hot-Rolled Plated Steel Sheet, Both With High Strength, And Manufacturing Method Thereof

MUMBAI, India, June 30 -- Intellectual Property India has published a patent application (202647074995 A) filed by Posco Co. , Ltd on June 17, 2026, for Hot-Rolled Steel Sheet And Hot-Rolled Plated Steel Sheet, Both With High Strength, And Manufacturing Method Thereof.

Inventors include Lee, Byounggab; and Kim, Hanhwi.

The application for the patent was published on June 26, 2026, under issue no. 26/2026.

Abstract: The present invention relates to a hot-rolled steel sheet and a hot-rolled plated steel sheet, both with high strength, and a manufacturing method thereof, wherein the steel sheet comprises, in weight%, C: 0.03-0.1%, Si: 0.1% or less, Mn: 0.7-1.4%, Ti: 0.03-0.09%, P: 0.02% or less, S: 0.02% or less, N: 0.01% or less, and the balance being Fe and other inevitable impurities, and satisfies relational expression 1 below. Relational expression 1) 3 * ([Mn]-0.9)2 + 1200 * ([Ti] - 0.06)2 + 0.0004 * (coiling temperature - 630)2 = 1 (in relational expression 1, [ ] indicates the weight% of each element, and the coiling temperature is given in degrees Celsius (?)).

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