Patent ID: 7048811

Claim:
An electric resistance welded steel pipe for a hollow stabilizer characterized by: containing, in mass, 0.20 to 0.35% of C, 0.10 to 0.50% of Si, 0.30 to 1.00% of Mn, 0.01 to 0.10% of Al, 0.10 to 1.00% of Cr, 0.005 to 1.00% of Mo, 0.001 to 0.02% of Ti, 0.0005 to 0.0050% of B and 0.0010 to 0.0100% of N; satisfying the expression N/14<Ti/47.9; and having the balance consisting of Fe and unavoidable impurities, and the welded steel pipe further has a ferrite phase, an average ferrite grain size of 3 to 45 μm, and an area percentage of ferrite crystal grains having an aspect ratio of 0.5 to 3.0 is 86% or more in the entire ferrite phase.