16mn/Q345D Srb Cold Seamless Tube for Hydro-Cylinder

Basic Info.Model NO.Q345BAfter-sales ServiceAccepted Standards as The BasisRolling ShapePipeProductPrecision TubeRoller PositionVerticalRoller NumberTwo-HighLayoutTandemTypeCold Rolling MillCertificationISO 9001TechniqueCold Rolled, SrbApplicationHydraulic CylinderSpecial PipeHydraulic TubeExternal Diameter50-203Internal Diameter40-200mmThickness3-30mmElongation≥16%Straightness0.3-1.0/1000Inner Diameter DeviationH7-H10Length1-10mClientsChina, Eastern Europe, Southeast AsiaDelievery Time9-45daysTrademarkone weekTransport PackageContaine, Bulk, Door to Door, RailSpecificationPrecision seamless pipeOriginShanghai, ChinaHS Code7304Product DescriptionWuxi Youli Precision Special Steel Co., Ltd.Was established in 2010, specialized in theproduction of excavators and other specialprecision cylinder tube construction machinery, vehicles, vessels, maritime machinery, hydraulic machinery and other industries port machinery, petroleum machinery, mining supporting the use of precision steel pipe Manufacturers.  Standard:seamless steel tubes as per standard ASTM/ASME/DIN/JIS/GOSTElongation: ≥16%Shape:round&customizedTest temperature:/OD: 75mmI.D Tolerance:  H8 ID:63mmLength:4.5mWT: 6mmID roughness: Ra≤0.1mmType:cold-rolled; inside hole honing(SRB)Technology: SRB&HonedYield strength:≥580Scope:Honed tube for hydraulic cylinder, swivel crane, injection machine for construction machine applicationTensile Strength:≥ 620Process-cycle:Billet-------Inspection/Shearing-------Pickling--------Surface trastment--------Cold Rolling-------Heat treatment-------Cutting-------Straightening-------Inspection-------Length measuring, Weithting, Coating, Marking Bundling  Chemical composition(%) of precision pipe's commin gradeStandardGradeCSiMnspCrGB/T 699GB/T 3639GB3077GB/T1591GB/T 8163-201810#0.07~0.130.17~0.370.35~0.65≤0.035≤0.035#0.17~0.230.17~0.370.35~0.65≤0.035≤0.035#0.32~0.390.17~0.370.35~0.65≤0.035≤0.035%#0.42~0.500.17~0.370.50~0.80≤0.035≤0.035 Cr0.37~0.440.17~0.370.50~0.80≤0.035≤0.0350.08~1.1025Mn0.22~0.290.17~0.370.70~1.00≤0.035≤0.035≤0.25Q345B≤0.20≤o.50≤1.7≤0.035≤0.035≤0.337Mn50.30~0.390.15~0.301.20~1.50≤0.015≤0.020Conventional mechanical properties of precision pipeStandardGradeDelivery ConditionsBK(hard)BKW(soft)Tensil Stength(Mpa)Make percentage elongation(%)Tensile stength(Mpa)Make percentage elongation(%)GB/T 3639GB 307720#≥550≥10≥490≥1525Mn≥600≥12≥540≥15Q345B≥620≥12≥550≥1545#≥645≥8≥625≥1540Cr≥784≥14\37Mn5≥784≥14\Dimensional tolerances of inner diameter StandardInner Diameter(mm)Inner Diameter Deviation(mm)GB1801-79H7H8H9H10300~+210~+330~+520~+8430-500~+250~+390~+620~+10050-800~+300~+460~+740~+12080-1200~+350~+540~+870~+140120-1800~+400~+630~+1000~+160180-2500~+460~+720~+1150~+185250-3150~+520~+810~+1700~+210315-4000~+570~+890~+1400~+230The last but not the least, our mission is achieving our customers'demand, making sure that the delivery of the product and service without any disadvantage must be on time. For the community to provide excellent service for employees to create success. We continue to innovate to help customers solve problems, while also improving their competitiveness.We believe that  cornerstone of defect prevention system control and process control.F A Q1. Q: Are you a trading company or Manufacturer?    A: Of course! We are the real manufacturer which in the field of a cold rolling seamless tube for more than 20 years.2. Q: What is your main market?    A: Local country, Southeast Asia, Korea, Netherlands and so on.3. Q: What is your delivery time?    A: As normally, it is 15~45 days after you confirm the order. If your order is urgent, we would like to try our best to            meet your requests.4. Q: What is your main payment item?   A: T/T and L/C5. Q: what is the scale of your enterprise?   A: There is some elder saying goes: "The sparrow may be small but it has all the vital organs". 6. Q: Why we choose you as our supplier?   A: Give us one order, you can feel the different price, quality, and service. Then, you will know us.You Li  Great honor to cooperate with you.And provide you with satisfactory products!!!