WHY CYLINDER BARREL NEED STRESS RELEASED AFTER COLD DRAWING
Stress released is a technique method usually for cold drawn seamless tube and honed cylinder barrel production process. With focus on the Hydraulic Cylinder Industry the following components are made by a Cold Drawing process: Cylinder Tube Cylinder Piston Rods When a 75,000 PSI minimum yield strength is specified for the design of parts in hydraulic and pneumatic cylinder there are several options for the material that will meet this regular specification. a) Cold Drawn Cylinder Tubes – both welded or seamless Grades : E355 , AISI-1020 or AISI-1026 b) Cold Drawn Round Bars used for producing Piston Rods Grades : 1045 to ASTM-A311 or 38MnVS6 For both products is strongly recommend after the Cold Drawing a further annealing process by stress relieving. The temperature and the time of permanence in the furnace depends on the steel grade of the product and also the cooling temperature and the time is extremely important to achieve the expected result. Cold Dra...