... :forged/tempered 3.HRC:44-48 HRC 4.working hrs:200-250 hrs Tractor rotavator blade sonalika ... tractors, exporting to Spain, Italy, Japan, Europe, USA, India, Middle East, Australia, etc.1)Material: spring steel, 65Mn ... treatment: normalized-hardened and tempered4)Hardness: 40 - 50HRC5)Working hours: 200-250 hrs. You may send your drawings ... your requirements. Tractor rotavator blade sonalika in India