A vehicle-use bearing apparatus including a hub wheel formed of steel
material to which a wheel is mounted and a rolling bearing mounted to an
outer periphery of the hub wheel. An end portion of the hub wheel is
expanded radially outward toward an inner ring provided to the rolling
bearing to be formed into a caulked portion and a percentage of sulfur
content is adjusted to be 0.020% by weight or less in steel material of
which the 10 caulked portion is formed.