Datong Hydraulic

  GB 40CR alloy Steel is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality low carbon,Low alloy chromium, molybdenum, nickel case hardening steel. Oil Quenched & Tempered Hardness is 28-34 HRc. GB 40CR steel Annealing delivery hardenss less than 250HB. 40CR With a lower carbon content range, So GB 40CR alloy steel have good weldability. GB 40CR Alloy steel, we can supply the round bar,  seamless steel tube ,  hard chrome bar . GB 40CR steel Round bar can be sawn to your required lengths as one offs or multiple cut pieces. Chemical composition C(％) 0.37～0.44 Si(％) 0.17～0.37 Mn(％) 0.50～0.80 P(％) ≤0.030 S(％) ≤0.030  Cr(％) 0.80～1.10           Equivalent Of 40Cr alloy Structure Steel USA Germany China Japan France England Italy Poland ISO Austria Sweden Spain ASTM/AISI/UNS/SAE DIN,WNr GB JIS AFNOR BS UNI PN ISO ONORM SS UNE 5140 / G51400 41Cr4 / 1.7035 40Cr SCr440 42C4  530A40 /...

  Induction hardening   is a form of heat treatment in which a metal part is heated by induction heating and then quenched. The quenched metal undergoes a martensitic transformation, increasing the hardness and brittleness of the part. Induction hardening is used to selectively harden areas of a part or assembly without affecting the properties of the part as a whole. The hardening depth is 1.5-5mm; medium/low-frequency quenching may lead to excessive depth and negative effect on strength; high-frequency quenching generally result in a shallow depth, and may ensure the balance of hardness and strength. AISI SAE 4140 alloy steel  is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components, like  cylinder rod , shafts, bolts, gears and other applications.  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 414...

  Hydraulic cylinders work by using hydraulic fluid (usually oil) to create pressure.  There is a  cylinder rod  which is connected to a piston.  This moves back and forth inside a  cylinder barrel .  One end of the barrel is capped (closed).  The other end of the barrel has the cylinder head or gland.  The piston rod will come out of the cylinder through here.   The piston rod material  42CrMo4 cylinder rod  with the material number 1.7225 is suitable for high-dynamic applications. Due to the material's high stability very high forces can be transmitted, e.g. for small connecting threads with large piston rods. Hard chrome plating means that an especially thick chrome layer is applied after the pre-honing and before finishing the honing process. The layer thickness depends on the rod diameter and has a hardness of more than 800 HV. Hard chrome plated piston rods can be used between -15°C and 200°C.

  A  telescopic hydraulic cylinder  can be used in several types of applications that require a linear force to be applied over a long distance. While a rod cylinder could potentially perform the job it may be too long when fully collapsed, where as a telescopic cylinder will typically be significantly shorter when in the same position. The collapsed package size plus long stroke capability of a telescopic cylinder is one of the advantages the design offers over a rod cylinder. Rod cylinders will apply the same force throughout their stroke, assuming that system pressure remains constant. While it is possible to design a telescopic cylinder that applies a constant force, the cost is significantly increased. Generally a  telescopic cylinder  will be used in applications where a constant force is not required. Both single acting and double acting telescopic cylinders are used in non-constant force applications. The most common of these in mobile applications are d...

  Multistage hydraulic cylinders   or telescopic hydraulic cylinders are a recent innovation that have enabled us to customize and enhance the application of various types of machinery. They are used for a wide range of applications including cultivation, construction, and civil engineering. The primary advantage of the multi-stage hydraulic cylinder lies in the extension capabilities of its shaft, allowing it a far longer stroke when compared with other cylinders. It consists of various tubular rods known as sleeves. These sleeves (usually five or six) are of decreasing diameters and are placed within each other. Once pressure is pumped into the cylinder, the largest sleeve (also known as barrel or main) is the first to extend. It is followed by subsequent sleeves up to the last one (known as a plunger) until it reaches its maximum extension. The compact design of the multi-stage hydraulic cylinder allows it to enhance the function of process operations by proving particularl...

  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.We are professional   40Cr Steel Bar   manufacturer. 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. 40CR STEEL CHEMICAL COMPOSITION   Chemical Composition (%) Grade C % Si Mn Cr 40Cr 0.37 – 0.44 0.17 – 0.37 0.5 – 0.8 0.80 – 1.10 MECHANICAL PROPERTIES OF 40CR ALLOY STEEL Tensile strength:...

 Both  Cold Drawn Seamless Tube  and Hot Finished Seamless steel tubes provide strength and durability, but the process used to create each type of tubing provides slightly different advantages. Deciding whether Cold Drawn Seamless or Hot Finish Seamless is best will depend on how you plan to use the tubing for your application. Cold Drawn Seamless mechanical tubing is created by hot rolling SAE 1018 carbon steel, then drawing it at room temperature. During the drawing process, the pointed end of the tube is passed through a die. Force is used to stretch the steel into the desired thickness and shape and smooth the surface. This type of steel tubing meets ASTM A519 standards. It provides high yield strength, close tolerances and a smooth finish that is preferable for many mechanical applications. Hot Finished Seamless mechanical tubing is produced using SEA 1026 carbon steel and is manufactured using the same extrusion process, only without the final step of drawing the t...