Magnetic Materials

Seamless cold drawn/rolling steel tubes Steel tubes for precision applications.? Technical delivery conditions.?

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Size range: O.D.:6-350mm???? W.T.:1-30mm????? L:max12000mm

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?????????????????????????????????????? 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 | - |
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?????????????????????????????????????? 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 diameter＞160mm: ReH≥420Mpa |
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Note: Special steel grade is also available, according to customer request.

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Applications: for Auto industry/for machinery use/Oil Cylinder Tube/Motorcyle shock absorber Auto shock absorber innder cylinder/Telescopic Cylinders