HSS DMo5 (DIN 1.3343) = high speed steel with components of wolfram, vanadium and molybdenum. Circular saw blades and knives made of this material have very good mechanical characteristics as well as an excellent strength. Due to the molybdenum content a fine martensitic structure is achieved which results in high resistance to breakage and metal fatigue of the blade. Wolfram increases resilience to friction especially at high cutting temperatures. Vanadium as well increases the resilience to friction.
HSS EMo5 (DIN 1.3243) = high speed steel with components of wolfram, molybdenum and cobalt. In comparison to HSS DMo5 HSS EMo5 contains 5 % cobalt resulting in an increase tool life. It is preferably used to cut stainless steels or steels with high tensile strength.
Carbide = Solid carbide. Solid carbides are metal matrix composites in which carbide, existing as small particles, is kept together through a metal matrix. It is then less hard than pure carbide but noticeably more tenacious. At the same time it’s harder than pure metals, alloys or hardened steel.
Compared to conventional cutting materials like high speed steel solid carbide saw blades show a reduced fracture toughness and thermal shock resistance but on the other hand they have significant advantages like a higher hardness and an increased temperature resistance. The main component of the generally used carbide grades is wolfram carbide. Mostly cobalt, but as well nickel or both is used as binder. The lower the proportion of cobalt is, the harder but as well the more brittle the carbide will be.