US 12,264,388 B2
Electric-resistance-welded steel pipe or tube for hollow stabilizer and method of manufacturing same
Ryoji Matsui, Tokyo (JP); Masatoshi Aratani, Tokyo (JP); and Tomonori Kondou, Tokyo (JP)
Assigned to JFE STEEL CORPORATION, Tokyo (JP)
Appl. No. 17/593,146
Filed by JFE STEEL CORPORATION, Tokyo (JP)
PCT Filed Feb. 12, 2020, PCT No. PCT/JP2020/005221
§ 371(c)(1), (2) Date Sep. 10, 2021,
PCT Pub. No. WO2020/189097, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 2019-048652 (JP), filed on Mar. 15, 2019.
Prior Publication US 2022/0186348 A1, Jun. 16, 2022
Int. Cl. C22C 38/16 (2006.01); C21D 8/10 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/10 (2006.01); C22C 38/12 (2006.01)
CPC C22C 38/16 (2013.01) [C21D 8/105 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/105 (2013.01); C22C 38/12 (2013.01)] 4 Claims
 
1. An electric-resistance-welded steel pipe or tube for a hollow stabilizer comprising:
a chemical composition containing, in mass %,
C: 0.15% or more and 0.19% or less,
Si: 0.1% or more and 1.0% or less,
Mn: 0.1% or more and 2.0% or less,
P: 0.1% or less,
S: 0.01% or less,
Al: 0.01% or more and 0.10% or less,
Ti: more than 0.05% and 0.1% or less,
B: 0.0005% or more and 0.005% or less,
Ca: 0.0001% or more and 0.0050% or less, and
N: 0.0050% or less, with the balance being Fe and inevitable impurities; and
a microstructure in which a cleanliness with respect to TiS particles with a particle size of 10 μm or more and a cleanliness with respect to MnS particles with a particle size of 10 μm or more are 0% or more and 0.1% or less, respectively, the cleanliness being measured by a point counting method according to JIS G 0555.