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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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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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Skiving &Roller Burnishing Tube And Honing Tube

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Skiving and roller burnishing tube  process provide high quality hydraulic cylinders with final sizing and creates the desired finish pattern on the interior of tubing or cylinder bores. They are used in the manufacturing of  hydraulic cylinders . Compared to honing process, they are 80-90% saving of machine time which reduces tool costs per meter of tube length and produces super finish surface, with a bore tolerance of IT8, thereby reduces the sealing wear making it ideal for pistons. The skiving tool is a multifunctional tool used in the manufacturing of hydraulic cylinders. Skiving is operated like this: Two thin chips are cut at a high feed rate (1-4 mm/rev) while the tool passes through the work piece. This cutting operation determines the finished diameter and tolerance of the hydraulic tube. Surface finish Ra= 4-10 μm (skiving) Skiving has obvious advantages compared with honing: • 80-90% saving of machine time which reduces tool costs per meter of tube length. • Produ
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