EN10305 E355 Seamless Steel Tube , Cold Drawn Precision Steel Tube For Hydraulic Cylinder
Description:
Seamless steel tubes, specifically cold drawn precision steel tubes for hydraulic cylinders, are engineered for high performance and durability. These tubes undergo a meticulous cold drawing process, resulting in exceptional dimensional accuracy and a superior surface finish. Designed to withstand high pressure and stress, they exhibit excellent tensile strength and fatigue resistance, making them ideal for hydraulic applications. The seamless construction eliminates weld weaknesses, enhancing reliability and safety. With outstanding corrosion resistance, these tubes ensure longevity in challenging environments. Their precision specifications cater to various industries, including automotive and manufacturing, where performance and durability are crucial for hydraulic systems.
| Standard | DIN2391, EN10305, ASTM A519, GB/T 3639-200 |
| Material | Q355B Q355D C20,ST52,E355 SAE1026.CK45 4130 4140 STKM 13C |
| Heat treatment | BK+S |
| Specification | Outer diameter(mm) | Inner diameter(mm) |
| 40-480mm | 30-400mm |
| I.D Tolerance | H8-H9 |
| Length | Fixed Length, Random Length(3--9m)or as requests of customers |
| Straightness | 0.5-1/1000 |
| ID roughness | RA 0.1-0.8micron(max) |
| Technology | Honed & SRB(SKIVED AND ROLLER BURNISHED ) |
| Scope | Honed tube for hydraulic cylinder, swivel crane, injection machine, and construction machine application |
Product Features:
1.Corrosion resistant
2.Accurate dimensions
3.Can sustain high pressure & temperature load
4.Rust proof finish
5.Smooth transition from flange thickness to pipe
6.Ensure excellent stress distribution
Straightness of standard precision tubes:
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| Straightness of the tubes is influenced by the mechanical properties of the tubes. For material having the yield point ReH <= 500 MPa is straightness 0,0015 multiple of the tube length maximum, allowed straightness for one meter length is 1.5 milimeters. For material with the yield point ReH > 500 MPa the allowable straightness for the whole length of the tube is 0.0020 multiple of the tube length, allowed straightness of one meter is 2 milimeters. |
Mechanical properties in room temperature:
| Steel grade | Maximum values depending on the delivery condition |
| +C | +LC | +SR | +A | +N |
| Steel symbol | Rm MPa | A % | Rm MPa | A % | Rm MPa | ReH Mpa | A % | Rm MPa | A % | Rm MPa | ReH Mpa | A % |
| E155 | 400 | 6 | 350 | 10 | 350 | 245 | 18 | 260 | 28 | 270 do 410 | 155 | 28 |
| E195 | 420 | 6 | 370 | 10 | 370 | 260 | 18 | 290 | 28 | 300 do 440 | 195 | 28 |
| E235 | 490 | 6 | 440 | 10 | 440 | 325 | 14 | 315 | 25 | 340 do 480 | 235 | 25 |
| E275 | 560 | 5 | 510 | 8 | 510 | 375 | 12 | 390 | 21 | 510 do 550 | 275 | 21 |
| E355 | 640 | 4 | 590 | 6 | 590 | 435 | 10 | 450 | 22 | 490 do 630 | 355 | 22 |
Chemical Composition (ladle analysis):
| Steel grade | % of the mass |
| Steel symbol | C max | Si max | Mn max | P max | S max |
| E155 | 0,11 | 0,35 | 0,70 | 0,025 | 0,025 |
| E195 | 0,15 | 0,35 | 0,70 | 0,025 | 0,025 |
| E235 | 0,17 | 0,35 | 1,20 | 0,025 | 0,025 |
| E275 | 0,21 | 0,35 | 1,40 | 0,025 | 0,025 |
| E355 | 0,22 | 0,35 | 1,60 | 0,025 | 0,025
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Delivery Conditions:
| Designation | Symbol | Description |
| Cold finished (hard) | BK | Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation. |
| Cold finished (soft) | BKW | The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding). |
| Cold finished and stress-relieved | BKS | Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree. |
| Annealed | GBK | The last cold forming process is followed by annealing in a controlled atmosphere. |
| Normalized | NBK | The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere. |
Product Tags:
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EN10305 OD10 E355 Seamless Steel Tube , Cold Drawn Precision Steel Tube For Hydraulic Cylinder Images
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