| Standard: EN10305-1 |
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| Steel tubes for precision applications.Technical delivery conditions.Seamless cold drawn tubes |
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| Applications: for Auto industry/for machinery use/Oil Cylinder Tube/Motorcyle shock absorber |
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| Auto shock absorber innder cylinder |
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| Size range: O.D.:6-280mm W.T.:1-30mm L:max12000mm |
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| Steel Grade and Chemical Compositions: |
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| Steel Grade | C | Si | Mn | P | S | Al |
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| Steel name | Steel number | max | max | max | max | max | min |
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| E215 | 1.0212 | 0.10 | 0.05 | 0.70 | 0.025 | 0.025 | 0.025 |
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| E235 | 1.0308 | 0.17 | 0.35 | 1.20 | 0.025 | 0.025 | - |
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| E355 | 1.0580 | 0.22 | 0.55 | 1.60 | 0.025 | 0.025 | - |
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| Mechanical properties at room temperature |
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| Steel grade | Minimum values for the delivery condition |
| Steel name | steel nubmer | (+Cc) | (+LCc) | (+SR) | (+Ad) | (+N) NBK |
| Rm Mpa | A % | Rm Mpa | A % | Rm Mpa | ReH Mpa | A % | Rm Mpa | A % | Rm Mpa | ReH Mpa | A % |
| E215 | 1.0212 | 430 | 8 | 380 | 12 | 380 | 280 | 16 | 280 | 30 | 290 to 430 | 215 | 30 |
| E235 | 1.0308 | 480 | 6 | 420 | 10 | 420 | 350 | 16 | 315 | 25 | 340 to 480 | 235 | 25 |
| E355 | 1.0580 | 640 | 4 | 580 | 7 | 580 | 450f | 10 | 450 | 22 | 490 to 630 | 355 | 22 |
| aRm: tensile strength; ReH: upper yield strength; A: elongation after fracture |
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| b 1Mpa=1N/mm2 |
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| c Depending on the degree of cold work in the finishing pass the yield strength may nearly be as high as the tensile strength. |
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| For calculation purposes the following relations are recommended: |
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| for delivery condition +C: ReH ≥0.8 Rm |
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| for delivery condition +LC: ReH ≥0.7 Rm |
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| d For calclulation purposes the following relation is recommended:ReH≥0.5Rm |
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| e For tubes with outside diameter ≤30mm and wall thickness ≤3mm the ReH minimim values are 10Mpa lower than the values given in this Table |
| f For tubes with outside diameter>160mm: ReH≥420Mpa |
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| Note: Special steel grade is also available, according to customer request. |
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product name:hydraulic steel tube
