Do You Know about the Characteristics of High Speed Steel?

Let’s talk about hss.

What is hss?

High-speed steel (HSS) is a tool steel with high hardness, high wear resistance and high heat resistance, also known as wind steel or front steel. Even cooling in air during 

hardening means hardening, and very Sharp. Also known as white steel.


High speed steel is a composite alloy steel containing carbide forming elements such as tungsten, molybdenum, chromium, vanadium and cobalt. The total amount of 

alloying elements is about 10-25%. It maintains high hardness at high heat cutting (about 500 ° C) and HRC can be higher than 60. This is the most important characteristic 

of high speed steel - red hardness. However, after quenching and low temperature tempering, the carbon tool steel has a high hardness at room temperature, but when the 

temperature is higher than 200 ° C, the hardness sharply drops, and the hardness at 500 ° C drops to an annealing state. The ability to cut metal is completely lost, which 

limits the use of carbon tool steel in cutting tools. High-speed steel makes up for the fatal shortcomings of carbon tool steel due to its good red hardness.

High-speed steel is mainly used to manufacture complex thin-edged and impact-resistant metal cutting tools, as well as high-temperature bearings and cold extrusion dies 

such as turning tools, drill bits, hobs, machine saw blades and high-speed demanding dies.

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Susan F.//SMC Editor