Hardness: Hardness is in the range of to HRc, (350 to 450 BHN) Barring mini cement plants, (which take the liners in Mn Steel), most of the bigger cement plants are using the HiCr liners because of the inherent supplies the complete package of Design, manufacture, supply and installation of complete set of Liners, Diaphragms, Diaphragm Frames, along with necessary ...