Seamless cold drawn/rolling steel tubes Steel tubes for precision applications. Technical delivery conditions.
Size range: O.D.:6-350mm W.T.:1-30mm L:max12000mm
| Steel Grade and Chemical Compositions: | |||||||
| Steel Grade | C | Si | Mn | P | S | Al | |
| Steel name | Steel number | max | max | max | max | max | min |
| E215 | 1.0212 | 0.10 | 0.05 | 0.70 | 0.03 | 0.025 | 0.025 |
| E235 | 1.0308 | 0.17 | 0.35 | 1.20 | 0.03 | 0.025 | - |
| E355 | 1.0580 | 0.22 | 0.55 | 1.60 | 0.03 | 0.025 | - |
| Mechanical properties at room temperature | |||||||||||||
| 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 | 290-430 | 215 | 30 |
| E235 | 1.0308 | 480 | 6 | 420 | 10 | 420 | 350 | 16 | 315 | 25 | 340-480 | 235 | 25 |
| E355 | 1.0580 | 640 | 4 | 580 | 7 | 580 | 450f | 10 | 450 | 22 | 490-630 | 355 | 22 |
| aRm: tensile strength; ReH: upper yield strength; A: elongation after fracture | |||||||||||||
| b 1Mpa=1N/mm2 | |||||||||||||
| c Depending on the degree of cold work in the finishing pass the yield strength may nearly be as high as the tensile strength. | |||||||||||||
| For calculation purposes the following relations are recommended: | |||||||||||||
| for delivery condition +C: ReH ≥0.8 Rm | |||||||||||||
| for delivery condition +LC: ReH ≥0.7 Rm | |||||||||||||
| d For calclulation purposes the following relation is recommended:ReH≥0.5Rm | |||||||||||||
| 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 diameter160mm: ReH≥420Mpa | |||||||||||||
Note: Special steel grade is also available, according to customer request.
Applications: for Auto industry/for machinery use/Oil Cylinder Tube/Motorcyle shock absorber Auto shock absorber innder cylinder/Telescopic Cylinders
