Abstract: Bumper beam of a closed sectional shape includes: a vehicle-body-side inner wall portion to be mounted on a vehicle body; upper and lower outwardly-extending wall portions that extend from the upper and lower ends of the inner wall portion toward the outside of the vehicle body; an outer wall portion connecting the outwardly-extending wall portions; and at least one horizontal inner rib connecting the outer wall portion and the inner wall portion, the outer wall portion having a vertical wall portion extending vertically downward from the outer end of the upper outwardly-extending wall portion and a slanted wall portion slanted from the lower end of the vertical wall portion toward the vehicle body. Gusset of a closed sectional shape includes a horizontal rib for dispersing an impact force at least to the slanted wall portion.

Abstract: Bumper beam of a closed sectional shape includes: a vehicle-body-side inner wall portion to be mounted on a vehicle body; upper and lower outwardly-extending wall portions that extend from the upper and lower ends of the inner wall portion toward the outside of the vehicle body; an outer wall portion connecting the outwardly-extending wall portions; and at least one horizontal inner rib connecting the outer wall portion and the inner wall portion, the outer wall portion having a vertical wall portion extending vertically downward from the outer end of the upper outwardly-extending wall portion and a slanted wall portion slanted from the lower end of the vertical wall portion toward the vehicle body. Gusset of a closed sectional shape includes a horizontal rib for dispersing an impact force at least to the slanted wall portion.

Abstract: A high-strength extruded article of an age-hardening aluminum alloy capable of educing an achromatic dark gray color after the anodizing treatment thereof and a method for the production thereof are disclosed. The method comprises subjecting an alloy billet comprising 0.9 to 3.0% by weight of Si, 0.3 to 0.6% by weight of Mg, less than 0.3% by weight of Fe, and the balance of Al and unavoidable impurities or an alloy billet comprising 0.005 to 0.1% by weight of Ti either alone or in combination with 0.001 to 0.02% by weight of B besides the components mentioned above to a soaking treatment at a temperature in the range of from 350 to 480.degree. C. for 2 to 12 hours, extruding the soaked alloy billet at a billet temperature in the range of from 380 to 450 .degree. C., and subjecting the extruded alloy to an aging treatment at a temperature in the range of from 170 to 200.degree. C. for 2 to 8 hours.

Abstract: A high-strength extruded article of an age-hardening aluminum alloy capable of educing an achromatic dark gray color after the anodizing treatment thereof and a method for the production thereof are disclosed. The method comprises subjecting an alloy billet comprising 0.9 to 3.0% by weight of Si, 0.3 to 0.6% by weight of Mg, less than 0.3% by weight of Fe, and the balance of Al and unavoidable impurities or an alloy billet comprising 0.005 to 0.1% by weight of Ti either alone or in combination with 0.001 to 0.02% by weight of B besides the components mentioned above to a soaking treatment at a temperature in the range of from 350.degree. to 480.degree. C. for 2 to 12 hours, extruding the soaked alloy billet at a billet temperature in the range of from 380.degree. to 450.degree. C., and subjecting the extruded alloy to an aging treatment at a temperature in the range of from 170.degree. to 200.degree. C. for 2 to 8 hours.