Hydraulic cylinder tube is known as honed tube also, it is usually made of cold drawn seamless tubes or DOM tubes, as hydraulic cylinder tubes are usually used to produce hydraulic cylinder body, so it is called hydraulic cylinder barrel commonly too.
Our hydraulic cylinder tube is ready to use for hydraulic cylinder applications without further ID processing.
[ Table of Content ]
- Hydraulic cylinder tube: Product Overview
- Honed cylinder tubes of material ST52 /ST52.3
- Hydraulic cylinder tubes of material E355
- Honed cylinder tubes of material SAE 1020
- SAE 4140 hydraulic cylinder barrel tubes
- 27SiMn hydraulic cylinder tubes
- 20MnV6 hydraulic cylinder tubes
Our factory supplies Hydraulic cylinder tube with details as below:
As a professional manufacturer & supplier of honed tubes for hydraulic cylinders, our factory manufactures many different steel grades for hydraulic cylinder tubes, and here below are the most popular materials.
- Carbon steel ST52, ST52.3,
- Carbon steel E355
- Steel SAE 4140: also known as 42CrMo
- Steel 27SiMn
- Carbon steel SAE 1020, Chinese 20#, C20
- Stainless steel 304, Stainless steel 316
Size Range: I.D 32 mm to I.D 762 mm; imperial size 1.25 inch to 30 inch.
The honed hydraulic cylinder tubes are suitable for various kinds of Precision Mechanical Tube, Honed Cylinder Tubing and Hydraulic Cylinder, Construct use Multi Joint Tube, Steel Axis Pipe, Injection Machine and Robotic Arm.
Quality Standards
Seamless Honed Tubes (Steel) with a micro-finish and highly accurate in bore size within tolerance H7 or equivalent.
- DIN 2391 Seamless Precison Steel Tubes
- EN10305 Steel Tubes for Precision Applications Seamless Cold Drawn Tubes
- ASTM A519 Standard Specification for Seamless Carbon and Alloy Steel Mechanical Tubing
- JIS G3445 Carbon Steel Tubes for Machine Structural Purposes
Grade: ST 52, ST52.3, CK45, E355, 16Mn, STKM13C, SAE1020, SAE1026, SAE1045
Size range
Hydraulic Cylinder Tubes are ready to use for hydraulic cylinder applications without further ID processing.
- Inside diameter from 32 to 762 mm, Max length 20 meters.
- Straightness: 0.5 /1000
- Tolerance EXT: DIN 2391
- Tolerance INT: ISO H8
- Roughness(Ra): 0.2 to 0.4µ
Main Manufacturing Process
- cold drawing
- normalizing treatment
- honing.
Tolerance standard
Different sizes of ready to use honed tube are available.
| ID(mm) | TOLERANCE(mm) | |||
| H7 | H8 | H9 | H10 | |
| ≦30 | +0.021/0 | +0.033/0 | +0.052/0 | +0.084/0 |
| 30 – ≦50 | +0.025/0 | +0.039/0 | +0.062/0 | +0.100/0 |
| 50 – ≦80 | +0.030/0 | +0.046/0 | +0.074/0 | +0.120/0 |
| 80 – ≦120 | +0.035/0 | +0.054/0 | +0.087/0 | +0.140/0 |
| 120 – ≦180 | +0.040/0 | +0.063/0 | +0.100/0 | +0.160/0 |
| 180 – ≦250 | +0.046/0 | +0.072/0 | +0.115/0 | +0.185/0 |
| 250 – ≦315 | +0.052/0 | +0.081/0 | +0.130/0 | +0.210/0 |
| 315 – ≦700 | +0.057/0 | +0.089/0 | +0.140/0 | +0.230/0 |
This will provide long piston seal life and prevent failure of the cylinder. The tube material is selected on the basis of application & working pressure.
The seamless tube for hydraulic cylinders, obtained from high quality cold drawn tubes, available in a wide dimensional range.
- Length: unfixed length or fixed length
- Package: banding with steel strips, braiding parcel at outside
- Conservation: Anti rust oiled coating on the inside and outside of the surface, plastic caps at both ends.
Carbon steel Hydraulic Cylinder Tube is available with grades as below:
- SAE 1020, SAE 1026, SAE1030/1035, SAE 1045
- E355, E255, E215, E235
- ST52.3, St35, ST 52.4, St 37.4
Stainless steel Honed cylinder tube can be supplied in grades as below:
- TP 304 / 304L
- TP316 / 316L
- TP 316Ti
Other steel grades of hone cylinder tube /honed pipe is available on customer’s request.
Advantages of hydraulic cylinder tube
- High precision tolerances;
Our honed tube can meet ID tolerance H7, H8, H9, … etc according to the customer’ requirements, and its I.D dimension. - Seamless tube with high pressure resistance;
We only use seamless cold drawn tubes to produce honed pipes, which means our honed tubing can work under higher pressure, thus our honed pipes are more reliable for hydraulic cylinder applications. - High Smooth inside surface;
The roughness of our honed pipe is Max Ra 0.4 microns ID finish (16Max Ra ID Finish). - Flexible order quantity: we accept small quantity orders, even if there is only one piece of hydraulic cylinder tubing we can produce and supply.
- Good weldability: The weldability of our honed steel tubing is very good, this is quite helpful for manufacturing the cylinders.
Main applications of Hydraulic Cylinder tubing
Honed tubing and SRB tubes (skived and roller burnished tubes) are mostly used as cylinder tube, such as hydraulic cylinder tube and pneumatic cylinder tubing, which are widely used for manufacturing and repairing hydraulic cylinders and pneumatic cylinders. As honed tube usually 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.
Hydraulic cylinder tube of material ST52 /ST52.3
ST52 honed cylinder tubes are honed tubes made of material steel grade ST52, and with standard of DIN 2391. St52 is equal to St52.3. Usually, this material of honed tubes is described as: cold drawn seamless honed tubes as per DIN2391 /ST52-BKS. BKS standards for the heat treatment for the honed tubing, which is stress relieved heat treatment. Here below is the specification of the steel ST52.
| Grade | Chemistry | % | Yield | Tensile | Elongation | Typical Hardness |
|---|---|---|---|---|---|---|
| min. Mpa | min. Mpa | % in 2″ section | Min | |||
| ST52.3 | Carbon | 0.140 – 0.180 | 420 | 580 | 15 | B-80 |
| Si | 0.150 – 0.300 | |||||
| Mn | 1.200 – 1.400 | |||||
| P | 0.020 max | |||||
| S | 0.010 max |
Hydraulic cylinder tubes of material E355
E355 hydraulic cylinder tubes are honed cylinder tubes made of material steel grade E355, and with standard of EN 10305-1. Actually steel E355 is equal to ST52 / St52.3. Usually this materials of honed tubes are describled as: cold drawn seamless honed tubes as per EN10305-1 /E355 +SR. +SR standards for the heat treatment for the honed tubing, which is stress relieved heat treatment.
Here below is the specification of the steel E355.
| Grade | Chemistry | % | Yield | Tensile | Elongation | Typical Hardness |
|---|---|---|---|---|---|---|
| min. Mpa | min. Mpa | % in 2″ section | Min | |||
| E355 | Carbon | 0.140 – 0.180 | 420 | 580 | 15 | B-80 |
| Si | 0.150 – 0.300 | |||||
| Mn | 1.200 – 1.400 | |||||
| P | 0.020 max | |||||
| S | 0.010 max |
Material ST52 /ST52.3 and E355 is also widely used to produce hard chrome plated hollow bars, which is also known as chrome plated OD tubes.
Hydraulic cylinder tube of material SAE 1020
SAE 1020 cylinder tubes are honed tubes made of material steel grade SAE 1020, this steel grade is equal to Chinese steel grade 20#. Cabon steel grade SAE 1020 is a low hardness and low tensile strength alloy. Honed pipes of material SAE1020 is cheaper than ST52 honed pipes and can be used for various applications.
| Grade | Chemistry | % | Yield | Tensile | Elongation | Typical Hardness |
|---|---|---|---|---|---|---|
| Min. Mpa | Min. Mpa | % in 2″ section | Min | |||
| 1020 | Carbon | 0.150 – 0.200 | 375 | 485 | 15 | B-75 |
| Mn | 0.300 – 0.600 | |||||
| P | 0.035 Max | |||||
| S | 0.035 Max |
SAE 4140 hydraulic cylinder barrel tube
SAE 4140 honed tubes are cold drawn seamless honed tubes made of steel grade SAE4140. 4140 honed hydraulic cylinder barrel tubes usually are used for applications under high pressure & heavy duty. As the tensile strength and yield strength of SAE 4140 is very high. Steel 4140 is equal to German steel grade of 42CrMo.
Below is the chemical composition of 4140 material.
| SAE 4140 /42CrMo | C% | Si% | Mn% | P% | S% | Cr% | Mo% |
| Min | 0.36 | 0.1 | 0.65 | 0.75 | 0.15 | ||
| Max | 0.44 | 0.4 | 1.1 | 0.04 | 0.04 | 1.2 | 0.35 |
Here below is the mechanical properties of SAE 4140.
| 4140 / 42CrMo | Yield strength | Tensile Strength | Elongation | Hardness HB |
| Min | 800 Mpa /115K psi | 900 Mpa /130K psi | 20% | 270 HB |
Steel 4140 / 42CrMo is also an idea material for manufacturing Chrome Plated Bar. Benefit for its high yield strength and tensile strength, 4140 chrome plated bar is usually used for applications where high strength is required.
27SiMn honed tube
27SiMn steel also can be used to produce honed tubing, though not as popular as ST52.3 /E355, this material of honed tubing is idea for some special applications.
27SiMn steel material chemical composition: C: 0.24-0.32%, Si: 1.10-1.40%, Mn: 1.10-1.40%.
27SiMn steel material mechanical properties: tensile strength min. 980 MPa; yield strength: min. 835 MPa; elongation after fracture: 12%; reduction of area: 40%; impact energy: 39J.
27SiMn honed tubes are also used for high strength applications.
20MnV6 hydraulic cylinder tube
20MnV6 steel also can be used to manufacture hydraulic cylinder honed tubes. It is a carbon-manganese steel micro alloyed with vanadium, generally supplied in the black hot rolled condition with a typical tensile strength range of 600 – 790 Mpa and a high typical yield strength range of 440 – 650 Mpa. 20MnV6 honed cylinder tubes usually is used for Super high strength applications.
Here below is the detailed specification of steel 20MnV6
| 20MnV6 Chemical Composition (Base Material) | ||
| Min % | Max % | |
| Carbon | 0.16 | 0.22 |
| Silicon | 0.10 | 0.35 |
| Manganese | 1.13 | 1.60 |
| Vanadium | 0.08 | 0.15 |
| Phosphorous | 0.00 | 0.03 |
| Sulphur | 0.02 | 0.04 |
| 20MnV6 Mechanical Property | ||
| Typical Mechanical Properties – As Supplied in the Black Hot Rolled Condition | ||
| Tensile Strength Mpa | 690 | |
| Yield Strength Mpa | 500 | |
| Elongation % | 21 | |
| Hardness HB | 210 | |
| Typical (Minimum) Mechanical Properties – Water Quenched at 925 °C and Tempered at 580 °C | ||
| Tensile Strength Mpa Min. Wall Thickness (mm) | ＜20mm | 750 |
| 20mm to 25mm | 700 | |
| ＜=30mm | 650 | |
| Yield Strength Mpa Min. Wall Thickness (mm) | ＜20mm | 650 |
| 20mm to 25mm | 620 | |
| ＜=30mm | 570 | |
| Elongation % Wall Thickness | ＜20mm | 16 |
| ＞20mm | 17 | |
| Impact J | +20°C | 40 |
| 0°C | 32 | |
| -20°C | 28 |
