System charts Grafici applicativi Anwendungsgrafiken Graphiques d’application Gráficos aplicativos Диаграммы SUPER ALLOYS APPLICATION HRC hardness ISO S 50 HF Hard+ 40 HF Uni+ 30 20 MMEFE+F 10 25 50 75 100 Vc [m/min] + 1st choice , suitable HARDENED STEEL APPLICATION HRC hardness ISO H 70 60 50 HF Hard+ UH+ 40 30 MEX+ 50 100 150 200 Vc [m/min] HF UNI : universal purpose (page 387) + 1st choice , suitable HF HARD : special purpose (page 463) MEF : special purpose (page 483) MEX : special purpose (page 523) UH :special purpose (page 583) 316