1.Material: 60Si2Mn/65Mn/28SiMnB 2.Process: forged 3.Hardness:HRC40-50 ... , Japan, Europe, USA,India, Middle East Asian countries,etc.. Features: Material: spring steel, 65Mn, 60Si2Mn (Sup7) or 28SiMnB2) Process: forged3) Heat ... .You may send your drawings or samples for accurate offers. Surely we can product as per your requirements. ROTARY TILLER BLADE FOR USA