Datong Hydraulic

As a professional manufacturer of hydraulic cylinder ,we usually will receive the requirements that customers ask chrome layer thickness of the cylinder rod , 20/25/30/50 Micron or customized can available for us. Hydraulic cylinder piston rod chromium plating layer is not thicker, the better, the reasons: 1, chromium coating in the process is reciprocating multiple coating, that is, the single coating amount is about 0.03-0.06, and the coating effect on the substrate surface is better, the secondary coating effect on the already coated surface is not good, easy to produce delamination, off the skin small defects, and the hydraulic system is the most taboo there are such defects; 2, when the coating thickness reaches more than 0.10, the domestic is not good, not can not be done, but is not necessary in the use of special occasions. 3, supplement: plating process can achieve 0.15-0.20 coating thickness; Coating thickness should vary according to the use of different occasions. When the...

  Hot rolled round bar , usually named “round bars”, are produced by hot rolling continuously cast steel billets. it's used in hot die pressing and forging but they may also undergo cold finishing. Hot rolled round bar is a strong, tough, ductile, formable and weldable steel material that can be used for numerous types of applications. It also provides a rougher surface and can be easily shaped and formed. Hot rolled steel bar stock is generally easy to drill and form while maintaining excellent mechanical properties. It is also characterized by its unique radius corners, compared to the sharp corners of cold rolled steel. It also maintains very good mechanical properties and is easy to fabricate.  Hot rolled round bars are used in hot die pressing and forging but they may also undergo  cold finishing . A variety of mechanical components such as gears, hubs, shafts, drives and many more can be obtained by die pressing and forging. They all have to resist, sustain and tran...

   ST37.4 NBK Hydraulic tubes are made in accordance to DIN 2391 or DIN 2445. It also called as cold drawn precision tube . ST37.4 NBK hydraulic tubes have a NBK finishing, where tubes are normalized, phospated, and oiled inside and outside. ST37.4 Hydraulic tubes  are measured by Outer Diameter (OD) and varies tube thickness (THK). Difference of OD and tube thickness will lead to different working pressure.  There are two type of material grade for hydraulic steel tubes , ST52.4 and ST37.4. ST52.4 is high tensile strength tube means it has higher permissible working pressures by reduced tube wall thickness, and leading to reduced system overall weight. Please refer to chemical composition for ST52.4 and ST37.4 tube material: CHEMICAL COMPOSITIONS OF HYDRAULIC STEEL TUBE MATERIALS Chemical Composition (%) Carbon (C) Silicon (Si) Manganese (Mn) Phosphorus (P) Sulfur (S) E355 (ST52.4) ⩽0.22 ⩽0.55 ⩽1.6 ⩽0.045 ⩽0.045  E235 (ST37.4) ⩽0.17 ⩽0.35 ⩽1.2  ⩽0.045...