Cutting edges / Grader blades Used for excavator, bulldozer, loader etc. Material usually used are GB80 and boron steel 30mnb Hardness for 30mnb material is 400-520hb Hardness for GB80 material is 260-300hb We could offer standard ones like 5d9553, 5d9554 etc., we could also make according to your drawings or samples.
