Patent ID: 9506131
Filing Date: 2016-11-29
CPC Classification: B65D,C21D,C22C

Claim Text:
1. A steel sheet for the bottom of aerosol cans with high resistance to pressure and high formability, the steel sheet having a chemical composition containing, by mass %, C: 0.02% or more and 0.10% or less, Si: 0.01% or more and 0.5% or less, P: 0.001% or more and 0.100% or less, S: 0.001% or more and 0.020% or less, N: 0.007% or more and 0.025% or less, Al: 0.01% or more and {−4.2×N (%)+0.11}% or less and {3.0×N (%)}% or less, and Nf is 0.65 or more where Nf is defined by equation Nf={N−N as AlN}/N, where N in the equation denotes the N content (mass %) in the steel and N as AlN denotes the content (mass %) of N which is present in the steel in the form of AlN, Mnf: 0.10% or more and less than 0.30% where Mnf is defined by equation Mnf=Mn−1.71×S, where Mn and S in the equation respectively denote the contents (mass %) of Mn and S in the steel, and the balance being Fe and inevitable impurities, wherein the steel sheet has a thickness of 0.35 mm or less, has a product of a lower yield point (N/mm