... 2,Over 10years experience. 3,ISO certificate tungsten carbide mechanical seal ringGrade Recommend GradeDensity g/cm3Hardness HRA(hv)T.R.S ... wood,processing original wood,aluminum section bar,brass rod and cast iron.YG814.6892320Suitable for the roughening of cast ... comparatively higher,suitable for processing cast iron, non-ferrous metal and non-metalloid materials.YNi814.688.51710This grade with 8% ...