... HRC 4.working hrs:200-250 hrs Thailland popular products 2013 farm sugarcane knifecompany nature:tiller blade manufacturercompany history:since ... Japan, Europe, USA, India, Middle East, Australia, etc.1)Material: spring steel, 65Mn, 60Si2Mn (Sup6), 28SiMnB2)Process: forged3)Heat treatment: normalized ... can product as per your requirements. Thailland popular products 2013 farm sugarcane knife