Advanced High Strength Steel

The SearchLite is conducting a Market Discovery Challenge to understand the future of High Strength Low Alloy High Strength Steel Castings.

High strength low-alloy steel (HSLA) is a type of alloy steel that provides better mechanical properties or greater resistance to corrosion than carbon steel. HSLA steels vary from other steels in that they are not made to meet a specific chemical composition but rather to specific mechanical properties. They have a carbon content between 0.05–0.25% to retain formability and weldability. Other alloying elements include up to 2.0% manganese and small quantities of copper, nickel, niobium,nitrogen, vanadium, chromium, molybdenum, titanium, calcium, rare earth elements, or zirconium.  Copper, titanium, vanadium, and niobium are added for strengthening purposes.  These elements are intended to alter the microstructure of carbon steels, which is usually a ferrite-pearlite aggregate, to produce a very fine dispersion of alloy carbides in an almost pure ferrite matrix. This eliminates the toughness-reducing effect of a pearlitic volume fraction yet maintains and increases the material’s strength by refining the grain size, which in the case of ferrite increases yield strength by 50% for every halving of the mean grain diameter. Precipitation strengthening plays a minor role, too. Their yield strengths can be anywhere between 250–590 megapascals (36,000–86,000 psi). Because of their higher strength and toughness HSLA steels usually require 25 to 30% more power to form, as compared to carbon steels.

Detroit Materials is an advanced materials firm focused on the commercialization of ultrahigh performance structural materials. They have a portfolio of customizable high-strength low-alloy structural ferrous materials for demanding applications in the defense, off-highway, tooling, and transportation industries. These new materials provide cost and performance advantages over current high alloy materials. The combination of material chemistry and manufacturing process creates steel with an average 40% lower material cost and similar properties to exotic alloys such as boron, nickel and cobalt steels.

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