Datong Hydraulic

 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...

 Both  Cold Drawn Seamless Tube  and Hot Finished Seamless steel tubes provide strength and durability, but the process used to create each type of tubing provides slightly different advantages. Deciding whether Cold Drawn Seamless or Hot Finish Seamless is best will depend on how you plan to use the tubing for your application. Cold Drawn Seamless mechanical tubing is created by hot rolling SAE 1018 carbon steel, then drawing it at room temperature. During the drawing process, the pointed end of the tube is passed through a die. Force is used to stretch the steel into the desired thickness and shape and smooth the surface. This type of steel tubing meets ASTM A519 standards. It provides high yield strength, close tolerances and a smooth finish that is preferable for many mechanical applications. Hot Finished Seamless mechanical tubing is produced using SEA 1026 carbon steel and is manufactured using the same extrusion process, only without the final step of drawing the t...