... 3.27%Cr content white iron 4.perfact surface We supply all kinds of warman slurry pumps ... lost form casting is a perfact solution for the surface problem of the impeller , and a range of ... gas hole , heat crack,sand burning,etc), the smooth surface is the key to the wear-resistant/corrosion-resistant of ... the wet side parts of the pumps ,good surface quality in the runner of the impeller can slow ...