Farm tractor sugarcane blade 1.material:60Si2Mn/28MnSiB 2.process:forged/tempered 3.HRC:44-48 HRC 4.working hrs: ... , Australia, etc.1)Material: spring steel, 65Mn, 60Si2Mn (Sup6), 28SiMnB2)Process: forged3)Heat treatment: normalized-hardened and tempered4)Hardness: 40 - 50HRC5 ...