DATONG HYDRAULIC/ Telescopic Hydraulic Cylinder/ OEM hydraulic cylinder ...

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40CR ALLOY STEEL SPECIFICATION

  40Cr steel  is a kind of Chinese GB standard alloy steel for engineering and machinery purpose, and one of the most widely used steel grades. For 40Cr material hardness, specifications and equivalent, please see the table below. After quenching and tempering treatment, 40Cr steel has good comprehensive mechanical properties, low temperature impact toughness, low notch sensitivity, good hardenability, and high fatigue strength in cold oil. When water cooling, the complicated shape of the parts is prone to cracks, the cold bending plasticity is medium, and the cutting workability after normalizing is good, but the weldability is poor, should be preheated before welding, and is generally used in the state of quenching and tempering. DATASHEET & SPECIFICATION The tables below list 40Cr alloy steel datasheet and specification including chemical composition, properties and heat treatment, etc. 40CR STEEL CHEMICAL COMPOSITION   Chemical Composition (%) Grade C % Si Mn Cr 40Cr 0.37 – 0.4
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How to deal with the scratch on the surface of hydraulic cylinder barrel

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As we all know,In the process of using the  hydraulic cylinder , the hydraulic cylinder barrel will be damaged,it is common that there will be scratch on the surface of the  honed tube , some customers will ignore these scratches, this to us is not responsible for the cylinder, when a small scratches in the cylinder,we usually take some tips to deal with them. 1.First,  to clean up the oil on the surface of our hydraulic cylinder barrel, then we will use the grinder machine to the surface treatment of the scratched part of our cylinder, at this time we have to grind the surface of the cylinder wall out of swallowtail groove. Although we have cleaned our cylinder at the beginning, at this time we need to clean the cylinder barrel further. At this time, we use anhydrous ethanol to clean the surface of the scratch repair of honed cylinder barrel. 2. We usually use special  repairing adhesive  to solve the scratches on the surface of  hydraulic cylinder barrel ,  before using it, we need t
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Honed tubes, SRB tubes, Skived and Roller Burnished tubes for Hydraulic Cylinder

Honed tubes and SRB tubes (skived and roller burnished tubes) are mostly application for hydraulic cylinder and pneumatic cylinder manufacturing, it’s the most important materials of hydraulic cylinder manufacturing.  Honed tube and SRB tube has very accuracy dimension tolerance and good surface smoothness, so this product is also used in applications where precision dimension or high smooth surface is need.   As one of the leading hydraulic cylinder honed tubes suppliers, our honed pipes using our factory’s Annealing Cold Drawn Seamless Tubes (CDS tubes). In order to produce extremely precise ID dimensions and smoothly ID surface, the honing process usually more times than others.  Honed tube for hydraulic cylinder is ready to use for producing or repairing hydraulic cylinders without any further inner surface processing.   PRODUCT STANDARD: ASTM A513, DIN 2391, DIN 1630, DIN 1629, EN 10216-2, A 519, etc on customer’s request. SIZE RANGE: I.D 30 mm to I.D 500 mm (1.5″ – 20″), Wall thi
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