Q10Basic Mechanical Engineering

In industrial metallurgy, 18-4-1 steel represents the absolute gold standard for extreme-performance High-Speed Steel (HSS), heavily utilized for manufacturing aggressive machine cutting tools like large drill bits, tough milling cutters, and complex gear hobs.

The strict chemical composition includes precisely 18% Tungsten ($W$), which rigorously imparts extreme "red hardness" (the crucial physical ability to actively maintain a sharp cutting edge even at glowing red-hot temperatures). The 4% Chromium ($Cr$) systematically provides extreme depth of hardenability, and the 1% Vanadium ($V$) explicitly increases abrasive wear resistance.