Hydraulic cylinder tube is known as honed tube also, it is usually made of cold drawns seamless tubes or DOM tubes, as hydraulic cylinder tubes are usually used to manufacture hydraulic cylinders body, so it is called hydraulic cylinder barrel commonly. There are many different steel grades can be used as the material of hydraulic cylinder tubes, and here below are the most popular materials.
- Carbon steel ST52, ST52.3,
- Carbon steel E355
- Carbon steel SAE 1020, Chinese 20#, C20
- Steel SAE 4140: also known as 42CrMo
- Steel 27SiMn
- Stainless steel 304
- Stainless steel 316
SKYLINE is a professional manufacturer & supplier of honed tubes for cylinders, our factory manufactures all these materials of honed cylinder tubes.
ST52 honed cylinder tubes
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 materials of honed tubes are describled 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 |
What is E355 Honed tubes?
E355 honed 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 |
What is SAE 1020 honed cylinder tubes?
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 |
What is SAE 4140 honed tubes?
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.
What is 27SiMn honed tubes?
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.
