... ) Longer life with ALTIN and TiALN Coated 3) Grain Materi Tungsten Carbide Ball Nose Milling Cutters1 Suitable for Copper,Cast Iron,Carbon ... Heat-treated steel processing. 2 Main features: Grain size carbon tungsten .high toughness,Tialn coating,high wear-risistance,special use for ... the smoothness,reduce the rubbing coefficient, and improve the lathe Tungsten Carbide Ball Nose Milling Cutters