Patent ID: 7501031
Filing Date: 2009-03-10
Classification: C22C

Abstract:
1. A steel sheet for tinplate and/or a TFS steel sheet each having an excellent formability, the steel of said steel sheet consisting essentially of in terms of percent by mass: C: 0.0030 to 0.0060%, Si: 0.04% or below, Mn: 0.60% or below, P: 0.005 to 0.03%, S: 0.02% or below, Al: more than 0.005% to 0.1%, N: 0.005% or below, satisfying the following formula <1>, and the balance of Fe and unavoidable impurities, wherein the steel of said steel sheet contains substantially no Nb, and the steel sheet having a sheet thickness of 0.2 mm or below and a hardness level (HR30T) of 61±3 to 76±3, and a Δr value representing in-plane anisotropy of said steel sheet in a range of −0.1 to +0.1;