DIN2391 Precision seamless steel tube for automobiles Grade: ST35, ST37, ST45, ST52,ST35.2,ST52.2
DIN2391 Precision seamless steel tube for automobiles
Description:
Precision steel tubes / DIN2391 Precision seamless steel tube for automobiles
To be used in hydraulic systems, automobile and precision machinery parts for cars and cylinders.
Standard: DIN2391-1, DIN2391-2
Grade: ST35, ST37, ST45, ST52,ST35.2,ST52.2
OD. Range:6mm – 114.3mm
Wall thickness: 1mm-15mm
Length: Max length 12M
Type: Seamless
Packaging detail: Bundles with plastic paper packaged or wooden box package
Delivery status: BK(+C), BKS(+SR), BKW(+LC), GBK(+A), NBK(+N)
Specifications:
Grade and Chemical Composition ( ％ )
|
Item |
Grade
|
C max |
Mn |
P max |
S max |
Si max |
|
St35 |
1.0308 |
0.17 |
≥0..4 |
0.025 |
0.025 |
0.35 |
|
St45 |
1.0408 |
0.21 |
≥0.4 |
0.025 |
0.025 |
0.35 |
|
St52 |
1.0508 |
0.22 |
≤1.6 |
0.025 |
0.025 |
0.55 |
Mechanical properties
|
item |
grade |
Cold finished (Hard) (BK) |
Cold finished (Soft) (BKW) |
Cold finished and stress-relieved (BKS) |
Annealed (GBK) |
Normalized (NBK) |
|||||||
|
Rm |
A |
Rm |
A |
Rm |
ReH |
A |
Rm |
A |
Rm |
ReH |
A |
||
|
MPa |
％ |
MPa |
％ |
MPa |
MPa |
％ |
MPa |
％ |
MPa |
％ |
|||
|
1 |
ST35 |
480 |
6 |
420 |
10 |
420 |
315 |
14 |
315 |
25 |
340-470 |
235 |
25 |
|
2 |
ST45 |
580 |
5 |
520 |
8 |
520 |
375 |
12 |
390 |
21 |
440-570 |
255 |
21 |
|
3 |
ST52 |
640 |
4 |
580 |
7 |
580 |
450 |
10 |
450 |
22 |
490-630 |
355 |
22 |
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