disc blade,disc blades,disc plough blade 1.65 Mn steel disc blade 2.44-48HRC hardness disc blade,disc blades,disc plough blade1.Dia.:560 mm.Thickness 6 mm3.Hardness:44-48HRC4.Material:65 Mn steel5.types:Notched ,Plain Holes Availability 1. Square2. Round 3. Round with key slot 4. Round and square combined Types of disc 5 . Plain 6.Notched wear-resistant,durable disc blade