Patent ID: 7922838
Filing Date: 2011-04-12
Classification: C21D,C22C

Abstract:
1. A crude oil tank, said crude oil tank being fabricated from a steel plate having a thickness of 40 mm or less and comprising, in mass, 0.001 to 0.2% C, 0.01 to 2.5% Si, 0.1 to 2% Mn, 0.03% or less P, 0.007% or less S, 0.1 to 1.5% Cu, 0.001 to 0.3% Al, 0.001 to 0.01% N, 0.03 to 01% Mo and optionally 0.01 to 0.5% W, satisfying the following expression, in mass %, with the balance consisting of Fe and unavoidable impurities.