|
Steel grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
Other elem ents |
|||||||
|
Steel name |
Steelnum ber |
min |
max |
min |
max |
min |
max |
max |
max |
min |
max |
min |
max |
min |
max |
|
|
E235 |
1.0308 |
|
0.17 |
- |
0.35 |
- |
1.20 |
0.030 |
0.035 |
|
|
|
|
|
|
|
|
E275 |
1.0225 |
|
0.21 |
- |
0.35 |
- |
1.40 |
0.030 |
0.035 |
|
|
|
|
|
|
|
|
E315 |
1.0236 |
|
0.21 |
- |
0.30 |
- |
1.50 |
0.030 |
0.035 |
|
|
|
|
|
|
|
|
E355 b |
1.0580 |
|
0. 22 |
- |
0.55 |
- |
1.60 |
0.030 |
0.035 |
|
|
|
|
|
|
|
|
E470 |
1.0536 |
0.16 |
0.22 |
0.10 |
0.50 |
1.30 |
1.70 |
0.030 |
0.035 |
|
|
|
|
|
|
Al min 0.010, N max. 0.020, Nb Max.0.07,V 0.08/0.15 |
|
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|
|
|
|
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|
C22E |
1.1 151 |
0. 17 |
0. 24 |
- |
0. 40 |
0. 40 |
0. 70 |
0.0 35 |
0.0 35 |
|
|
|
|
|
|
|
|
C35E |
1.1 181 |
0. 32 |
0. 39 |
- |
0. 40 |
0. 50 |
0. 80 |
0.0 35 |
0.0 35 |
|
|
|
|
|
|
|
|
C45E |
1.1 191 |
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| Term | Symbol | Explanation |
|
Cold-finished/hard
(cold-finished as-drawn) |
BK | No heat treatment after the last cold-forming process. The tubes therefore have only low deformability. |
|
Cold-finished/soft
(lightly cold-worked) |
BKW | After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits. |
| Annealed | GBK | After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum. |
| Normalized | NBK | The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum. |