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How to distinguish the quality of hydraulic seamless steel pipes?

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 The quality of hydraulic  seamless steel pipes can be distinguished from the following aspects: First, distinguish by checking the appearance. The surface of inferior seamless steel pipes is prone to scarring, which is mainly due to more impurities and uneven materials. Second, dimensional accuracy. The inner and outer diameters of inferior small-diameter seamless steel pipes fluctuate too much. Some may also have a wall deviation phenomenon, and the wall deviation phenomenon is serious. Third, folding. Fake steel pipes are prone to folding. Folding is a variety of fold lines formed on the surface of seamless steel pipes due to the manufacturer's pursuit of high efficiency. This defect usually runs through the entire product. The surface is pockmarked, the surface is prone to scarring and cracks, and even scratches, there is no metallic luster, and the cross-section is oval. These defects have made us deeply uneasy. Especially when they aere used for cylinder barrels . Fourt...
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YUTONG INDUSTRY/ precision honed tubing/hydraulic tubes/cylinder barrels

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YUTONG MACHINERY CO. LTD was established in 2001, we are the professional leading manufacturer & supplier of hydraulic cylinder honed tube and cylinder piston rod in Wuxi City, Jiangsu Province. Specializing in the production of various types of hydraulic cylinders as well as cylinder barrel and tube, cylinder rods,honed tubes,skiving roller &burnished tube, cold drawn precision tube ,chrome plated bar,hollow chrome rod ,induction hardened chrome rod and other cylinder accessories. OUR TEAM Our factory has more than 250 skilled staff, among those 40% are engineers and high educated staff, and 30% of our workers have more than 20 years’ experience in manufacturing. OUT PRODUCTS Cylinder Honed Tube,Cylinder Piston Rod, Hydraulic Cylinder Barrel, Skived and Roller Burnished Tube, Cold Drawn Precision Tube,Chrome Plated Bar, Hard Chrome Rod, Hollow Chrome Rod,Induction Hardened Piston Rod, Induction Hardened Chrome Plated Bar and other steel tube and rods. EQUIPMENT & FACILITIE...
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Superior Strength & Performance Of SAE4140 Honing Tube

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  In industries where reliability and precision are paramount,   SAE 4140 honing tubes   have emerged as a game-changer. Combining the robustness of SAE 4140 alloy steel with the precision of advanced honing processes, these tubes deliver unmatched performance in critical applications. Whether you’re building hydraulic systems, aerospace components, or high-pressure machinery, here’s why SAE 4140 honing tubes should be your material of choice. What Makes SAE 4140 Honing Tubes Stand Out? Material : 4140,AISI4140, SCM440, 42CrMo4  Delivery Condition : BK, BK+S, GBK, NBK ID Size  : 20mm – 1500mm，Length: max 16m Type : Seamless, Hot Rolled, Cold Rolled, Cold Drawn Straightness : ≤ 0.5/1000； Roughness: 0.2-0.4 u Tolerance EXT : DIN2391, EN10305, GB/T 1619 Tolerance INT : H7,H8,H9 SAE 4140 steel is a low-alloy chromium-molybdenum steel known for its exceptional strength, toughness, and fatigue resistance. When paired with p...
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Product Details Of ST52 Hydraulic precision tube

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 The ST52 Hydraulic Precision Tube is engineered for demanding hydraulic systems requiring exceptional strength, dimensional accuracy, and durability. Designed to meet international standards, this tube is ideal for high-pressure applications in industries such as construction, agriculture, automotive, and industrial machinery. Its advanced manufacturing process ensures optimal performance, reliability, and longevity under extreme conditions. Parameter Value/Specification Material Grade : ST52 (Equivalent to S52C / 1050 steel) – High-carbon steel with enhanced tensile strength. Outer Diameter (OD):  Customizable (Typical range: 6 mm – 50 mm) Wall Thickness Precision tolerance: ±0.1 mm (ISO 4200 / EN 10305-4 compliant) Inner Diameter (ID) : Matched to OD and wall thickness (tolerance: ±0.08 mm) Tensile Strength : ≥ 600 MPa Yield Strength:  ≥ 450 MPa Hardness HB : 220 – 250 (Rockwell B scale: 95 – 100) Surface Finish:  Cold-drawn or polished (Ra ≤ 0.8 μm) Hydraulic Pr...
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E355 Seamless Cold Drawn Tubes | High-Precision Steel Pipes

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 In the hydraulic field, E355 seamless cold drawn tubes are usually used for material of cylinder barrel , and also used for the production of Honed Tubes and Skived & Roller Burnished Tubes.,It’s also widely used in hydraulic system with precision steel tube, hydraulic press with precision steel tube, shipbuilding with steel tube, hydraulic machinery,hydraulic cutting machine, hydraulic equipment, hydraulic tubing, engineering machinery.Cold Drawn Seamless Tube/CDS Tube/Pre-Honed Tube/Ready to Honed Tube/ Description Of E355 Seamless Cold Drawn Tubes Material : E215，E235 ,E355 ，ST52 Delivery Condition : BK, BK+S, GBK, NBK ID Size : 10mm – 1000mm，Length: max 16m Type : Seamless, Hot Rolled, Cold Rolled, Cold Drawn Straightness : ≤ 0.5/1000 Roughness : 0.2-0.4 u Tolerance EXT : DIN2391, EN10305, GB/T 1619 Chemical Composition Steel Grade Chemical Components (%) Steel Name Steel Number C   max. Si   max. Mn   max. P   m...
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SAE4140 Q+T Induction Hardened Chrome Rod

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  SAE4140   Q+T Induction Hardened Chrome Rod  usually manufactured from cold rolled or hot rolled carbon steel 4140 round bars, The surface of the electroplated coating of the chrome-plated rod after treatment has no blackening, peeling, no wrinkling, no pinholes, and the surface of the coating is smooth.Induction Hardened produced by using advanced processing techniques usually on steel rods, for surface removal, polishing, induction hardening, followed by hard chrome plating. 4140 hard chrome plated bar is used extensively by the hydraulic and pneumatic industries, and is employed by other industry sectors for a wide range of applications requiring higher strength. Description Of 4140 Q+T Induction Hardened Chrome Rod Material : SAE4140 AISI4140 SCM440,42Crmo4 4140 Type:  Induction Hardened Chrome Rod/Chrome Plated Bar/Chrome Plated Rod/Nickel-Chrome Plated Rod/ Hollow Chrome Bar /Hollow Chrome Rod Heat Treatment Type:  1) Induction Hardened  2)Q+T(...
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ISO H8 Cylinder Tube,Honing Tubing For Hydraulic Cylinders

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  ISO H8 Cylinder tube is a cold-drawn steel tube, steel grade ST52 , in accordance with DIN 2391 HONED with ISO-tolerance range H8 on the internal diameter. Basic material for manufacturing welded hydraulic cylinders particularly suitable for the industrial, mobile and special applications sector. Honing process Of  H8 Cylinder Tube * machining the internal surface of the tube to a precise diameter and surface finish *  using a honing stone to remove material and achieve the desired surface finish  * Resulting in a smooth , cylindrical internal surface with a surface finish of Ra 0.2 – 0.4um ( micro – inches) Description Of H8 Cylinder Honed Tube Material : E355 ST52,STKM 13C Delivery Condition : BK, BK+S, GBK, NBK ID Size  : 20mm – 1500mm Length : max 16m Type : Seamless, Hot Rolled, Cold Rolled,  Cold Drawn Straightness : ≤ 0.5/1000 Roughness : 0.2-0.4 u Tolerance EXT : DIN2391, EN10305, GB/T 1619,GOST 8731,GOST 10...
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