Motor grader Cutting edges and End bits:Material consist of high carbon ... and high quality boron steel, also have two types Motor grader Cutting edges and End bits:Material consist of high carbon ... .040.040.030.030.03 Material C80 Hardness HB280FOR MOTOR GRADER AND END BITSCMnSiCrTiBAlMoNiCuSP30MnB0.31.50.250.50.050.0050.040 ...