1. Standard:
EN10305-2 Steel tubes for precision applications
2. Steel Grade:
E155,E195,E235,E275,E355, other materials upon agreement with customers.
3. Production method:
Cold drawn on the weled steel tubes, to reach high accuracy on the OD and WT tolerance
4.Size range:
O.D.:20-220mm W.T.:1-15mm L:max12000mm
5. Packing:
In Hexagonal Bundles, wth anti-rust oil protection, with seaworthy packing
6.Deliver condition:
1). +C No heat treatment after the final cold drawing process
2). +LC After the final heat treatment there is a suitab drawing pass
3). +SR After the final cold drawing process there is a stress relieve heat treatment in a controlled atmosphere
4). +A After the final cold drawing process the tubes are annealed in a controlled atmosphere
5). +N After the final cold cold drawing operation the tubes are normalized in a controlled atmosphere
Please specifiy the final heat treatment when sending the enquiry.
7.Main Features:
Smooth surface,high accuracy, excellent brightness, high cleanness inside wall.
8.Main Application:
used in automobile and in the occasion where the high precision , brightness, cleanness of the tube are required.
| Steel Grade and Chemical Compositions: | ||||||
| Steel Grade | C | Si | Mn | P | S | |
| Steel name | Steel number | max | max | max | max | max |
| E155 | 1.0033 | 0.11 | 0.35 | 0.70 | 0.03 | 0.025 |
| E195 | 1.0034 | 0.15 | 0.35 | 0.70 | 0.03 | 0.025 |
| E235 | 1.0308 | 0.17 | 0.35 | 1.20 | 0.03 | 0.025 |
| E275 | 1.0225 | 0.21 | 0.35 | 1.40 | 0.03 | 0.025 |
| E355 | 1.0580 | 0.22 | 0.35 | 1.60 | 0.03 | 0.025 |
| Mechanical properties at room temperature | |||||||||||||
| Steel grade | Minimum values for the delivery conditiona b | ||||||||||||
| Steel name | (+Cc) | (+LCc) | (+SR) | (+Ad) | (+N) | ||||||||
| Rm Mpa | A % | Rm Mpa | A % | Rm Mpa | ReH Mpa | A % | Rm Mpa | A % | Rm Mpa | ReHe Mpa | A % | ||
| E155 | 1.0033 | 400 | 6 | 350 | 10 | 350 | 245 | 18 | 260 | 28 | 270 to 410 | 155 | 28 |
| E195 | 1.0034 | 420 | 6 | 370 | 10 | 370 | 260 | 18 | 290 | 28 | 300 to 440 | 195 | 28 |
| E235 | 1.0308 | 490 | 6 | 440 | 10 | 440 | 325 | 14 | 315 | 25 | 340 to 480 | 235 | 25 |
| E275 | 1.0225 | 560 | 5 | 510 | 8 | 510 | 375 | 12 | 390 | 21 | 410 to 550 | 275 | 21 |
| E355 | 1.0580 | 640 | 4 | 590 | 6 | 590 | 435 | 10 | 450 | 22 | 490 to 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
Note: Special steel grade is also available, according to customer request.
