Cold Drawn Hydraulic Cylinder Tubes Introduction Skived and roller burnished tubes are presicion tubes with smooth inside , they also could be skived and burnished pipe. Tubes or pipes inside tolerance could be H10, H9 or H8. Outside tolerance, wall thickness tolerance are produced according to seamless cold drawn tubes for precision application standard GB/T3639-2009 , EN10305 or DIN2391 standard. Material SAE1020, 20#, ST45, CK45, ST52, E355 tubes and so on for you to choose. IF you are looking for seamless cold drawn honed tubes or SRB tubes for hydraulic cylinder pipes or pneumatic cylinder tubes, please contact us without any hesitation. Cold Drawn Hydraulic Cylinder Tube technical parameters and Details Application: hydraulic cylinder, pneumatic cylinder, oil cylinder, telescopic cylinder. Original: Jiangsu, China Certification: ISO9001. Material: SAE1020, 20#, ST45, CK45, ST52, E355 Payment term: TT, LC Delivery date: usually 20 to 40 days. Packing: packed in bundle, oiled inside, with caps on both ends. Market: Middle East/ Africa/Asia/South America/Europe/North America MOQ: Depends on exact size and material. Mechanical Properties: Final Supply ConditionCold finished （Hard）（BK）Cold drawn and stress-relieved （BK+S or + SR）Hardness HB ParametersT.S obN/mm2Elongation δ5%T.S obN/mm2Y.S OsN/mm2Elongation δ5% 20# (A106B, ST45, E255)≧550≧8≧520≧375≧12175 45#(CK45)≧650≧5///207 Q345B(ST52, E355)≧640≧5≧600≧520≧15190 25Mn≧640≧5≧600≧510≧15195 27SiMn≧840≧5≧800≧720≧10230 Size list: (if you need other sizes, please let us know) Production process Raw material – annealing for material of 45#, 27SiMn, 25Mn – Acid cleaning – parkerizing & Saponifying – cold drawn – leveling – saw off bad section – stress relieving – leveling –honing or skiving – inspection – oiled plated - packingSkived And Burnished Tube manufacturers website:http://www.ht-tube.com/skived-and-burnished-tube/