Anbao Hydraulic

 AISI SAE 4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components, like axles, shafts, bolts, gears and hydraulic applications. Similar to alloy grade AISI 4130 chrome moly alloy steel but with a slightly higher carbon content. The higher carbon content of AISI 4140 steel gives greater strength and heat treatment capabilities in comparison to AISI / ASTM 4130 alloy steels, however it does have inferior weldability characteristics. Common 4140 Steel Specifications Country USA German British Japan China Australia Standard ASTM A29 DIN 17200 BS 970 JIS G4105 GB/T 3077 AS 1444 Grades 4140 1.7225/ 42crmo4 42CrMo4 SCM440 42CrMo 4140 4140 Steel Bar Chemical Composition Standard Grade C Mn P S Si Ni Cr Mo ASTM A29 4140 0.38-0.43 0.75-1.00 0.035 0.040 0.15-0.35 – 0.8-1.10 0.15-0.25 EN 10250 42CrMo4/ 1.7225 0.38-0.45 0.6-0.9 0.035 0.035 0.4 – 0.9-1.2

  42CrMo is a Chinese standard chromium-molybdenum high strength steel with good hardenability and toughness. This steel usually adopts quenching after tempering as the heat treatment solution. After tempering, it has relatively high fatigue and impact resistance and no obvious temper brittleness. 42CrMo/4140  has good mechanical properties and machinability, mainly in the form of plate and round rod. In the processing industry, the 42CrMo plate for the mold processing production, the 42CrMo round rod for mechanical direct processing parts. 42CrMo bar and plate is mainly used for manufacturing important structural parts working under high load such as hydraulic shafts, transmission gear, supercharger gear, engine cylinder; Spring clip, oil drill pipe clamp first class parts. In the mold manufacturing industry, 42CrMo is also suitable for large and medium-sized plastic molds with certain strength and toughness. The corresponding material of 42CrMo steel as per the European Union, Japan,

 Hard chrome plating is a critical part of hydraulic cylinder repair. Cylinder rods that have been in use for a substantial length of time will invariably exhibit some degree of wear on the hard chrome surface, which means replating the chrome is best practice when it comes to returning your cylinders to peak operating effectiveness. However, hard chrome plating is a highly specialised process involving chemistry, metallurgy, mechanical skill, deep knowledge and extensive experience. There are many things that can go wrong - from bad electrical connections to poor bath chemistry, improper pre-plate grinding or improper racking & jigging. here are the 8 common hard chrome plating problems you should avoid when repairing your hydraulic cylinder rod; Dull / milky deposits: There are a number of potential causes for poor chrome appearance, but it is most commonly caused by a mismatch in current density and bath temperature. This condition could also signify the presence of chlori