Super fine machining samples Group of Steel Materials SCM, SKD .Super fine machining samples Group of Steel Materials SCM, SKD, STAVAX, Tungsten. . HPM-31, M, End mill machining by φ0.2, t=0.4, *1268. SK-31(HRC55).superfine steel mill group,superfine steel mill group,Super fine machining samples｜Group of Stainless Steel Materials .Material, Tool address, Machining detail, ReportNo. SUS301, D, Drilling by φ0.3 drill, t=1.0, *1293. SUS303, M, Machining by φ0.4 end mill etc.(designated.