... them highly resistant to damage, impact, vibration, clamping and cutting force. Files shear knives's life are above 3-5 times ... hard alloy≥40HRC250HVJC-2Shear steel billet of 800-1150,the blade without water or poor water conditionAll kinds of hot rolled ... billet,hot-rolled wood blade≥40HRC238HVJC-3Shear the steel,water-cooled blade with better conditionsAll kinds of hot-rolled ...