M/s. Aggarwal & Company Chandni Chowk, Delhi

high speed steel (commonly abbreviated to hss) is a material usually used in the manufacture of machine tool bits and other cutters. It is often used in power saw blades and drill bits. It is superior to the older high carbon steel tools used extensively through the 1940s in that it can withstand higher temperatures without losing its temper (hardness). This property allows hss to cut faster than high carbon steel, hence the name high speed steel. At room temperature hss and high carbon steel have an equivalent hardness; only at elevated temperatures does hss become advantageous.   applications: the main use of high speed steels continues to be in the manufacture of various cutting tools, drills, taps, milling cutters, tool bits, gear cutters, saw blades, etc., although usage for punches and dies is increasing.the characteristic properties of all high speed steels grades include.   aisi m2    aisi m4    aisi m35   aisi m42    aisi t1    aisi t4    aisi t5    aisi t15    aisi t-42

cold-work tool steels include all high-chromium class d, medium-alloy air-hardening class a alloys, water hardening w alloys, and oil hardening o alloys. Typical applications include cold working operations such as stamping dies, draw dies, burnishing tools, coining tools, and shear blades.   aisi d2    aisi d3       

Hot-work tool steels include all chromium, tungsten, and molybdenum class h alloys. They are typically used for forging, die casting, heading, piercing, trim, extrusion, and hot-shear and punching blades.