Technical information Drilling WALTER TITEX Cutting tool materials HSS cutting tool materials 4 groups of high-speed steel are used for Walter Ti

Technical information Drilling WALTER TITEX Cutting tool materials HSS cutting tool materials 4 groups of high-speed steel are used for Walter Titex tools HSS High-speed steel for general applications (twist drills, core drills, countersinks, reamers in some cases, center drills, step drills) HSS-E High-speed steel with 5 % Co to withstand higher stress, especially thermal stress (high-performance twist drills, reamers in some cases) HSS-E Co8 High-speed steel with 8 % Co for maximum thermal loading capability, in accordance with American standard designation M 42 (Special tools) HSS-E-PM High-speed steel manufactured using powder metallurgy with extremely high alloy content Advantages high purity and consistency of microstructure, outstanding wear resistance and thermal loading capability (Special tools) Material no. Short name Old standard designation AISI ASTM Alloy table AFNOR B.S. UNI C Cr W Mo V Co HSS 1.3343 S 6-5-2 DMo5 M2 BM2 HS 6-5-2 0.82 4.0 6.5 5.0 2.0 HSS-E 1.3243 S 6-5-2-5 EMo5 Co5 M35 65.2.5 HS 6-5-2-5 0.82 4.5 6.0 5.0 2.0 5.0 HSS-E Co8 1.3247 S 2-10-1-8 M42 BM42 HS 2-9-1-8 1.08 4.0 1.5 9.5 1.2 8.25 HSS-E-PM Trade designation ASP Carbide cutting tool materials Carbides mainly consist of tungsten carbide (WC) as the hard material and cobalt (Co) as the binding material. In the majority of cases, the cobalt content is between 6 and 12 %. The following rule generally applies The higher the cobalt content, the tougher the material, but the less wear resistance and vice-versa. Another determining factor in carbides is the grain size. The hardness increases as the grain size decreases. Co in % Grain size Hardness HV K10 extremely wear-resistant substrate use in brazed drilling and boring tools 6 normal 1650 K20F extremely wear-resistant substrate with fine grain size use in short-chipping materials such as cast iron workpieces 6-7 fine 1650-1800 K30F extremely fine substrate, extremely tough and wear-resistant universal application for a variety of materials 10 finest 1550 B 392