1S225 power tiller blade 1.material:65Mn 2.process:forged/tempered 3.working hrs ... :200-250 hrs 4.HRC:44-48 1S225 65Mn farm disc power ... Italy, Japan, Europe, USA, India, Middle East, Australia, etc.1)Material: spring steel, 65Mn, 60Si2Mn (Sup6), 28SiMnB2)Process: forged3)Heat ... as per your requirements. 1S225 65Mn farm disc power tiller blades