| abstract |
C: 0.07 to 0.20% by mass, Si: over 0.6% and 1.5% or less, Mn: 1-3%, Cr: 0.1 to 1.0%, sol.Al: 0.005 to 0.080%, Ti: 0.005 to 0.060%, Nb : 0.005 to 0.060%, Ti + Nb ≦ 0.070%, N: 150 ppm or less, P: 0.035% or less, S: 0.035% or less, Cu: 0.01 to 1.00%, Ni: 0.01 to 1.00%, and the balance is Fe And an unavoidable impurity, wherein the structure before forming the stabilizer is made of any one of bainite or martensite or a mixed structure of bainite / martensite, and the guostenite crystal grain size after heat treatment of the stabilizer has a particle size number of 9 or more. High strength stabilizer steel for vehicles excellent in corrosion resistance and low temperature toughness. |