This paper which deals partly with interesting or novel applications of high-strength, low-alloy steels in the automotive field and partly with the superior mechanical properties and corrosion resistance of such steels has been presented in part before but it has not been published.Some of it was given before the Annual Convention of the Truck Body and Equipment Association.A great deal of the material which was available to me on the subject of high-strength steels dealt with operating costs of motor vehicles under a wide variety of uses.It is of course easy to understand why reduced license fees, reduced tire wear and reduced gasoline consumption are of prime importance especially to fleet operators but it seemed to me that many of the fundamental aspects of materials engineering had been either overlooked or ignored in favor of this type of cost study.Therefore, I decided not to talk about costs, at least in that fashion, but to concentrate on the engineering characteristics of the steel as I see them.