ABSTRACT
This chapter defines high strength steels and explains their need. This chapter describes the types of high strength steels and the associated problems in developing them and explains their properties, advantages and limitations. The definition for ultra-high steels is described in brief. The properties and applications of important high strength steels such as Modified standard low alloy steels, rephosphorized steel, micro-alloyed or high-strength low alloy (HSLA) steels, bake hardening (BH) steels, dual phase (DP) and TRIP steels are described in detail. High strength steels by thermomechanical treatments, patenting of steel wires, severe plastic deformation of steels, nanostructured steels, bainitic steels, and nanostructured bainitic steels are described. The metallurgy of high strength steels are discussed briefly. Mechanical properties of the most common high strength and advanced high strength steels are tabulated. The use of high strength steels particularly for automotive and aerospace applications is described briefly.
