Changzhou Joyruns Steel Tube CO.,LTD
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DIN2391 ST45 ST52 Precision Steel Tubing, Polished Steel Tube
DIN2391 cold drawn and bright seamless precision steel tube is used as the tube to be phosphate. The phosphate is realized with the imported chemical fluid to form a black film. The antirust oil is absorbed by means of the micropore on the film to prevent rust. The caps are covered at two ends of the tube to prevent dust.
Description:
Seamless Precision Steel Tubing, bright heat treatment without oxidation (NBK status), non-destructive testing, cleaning, phosphating, anti-rust oil dipping, the application for machine tools industry, construction machinery, shipbuilding industry-hydraulic system, automotive steel tube, and in the occasion where the high precision, brightness, cleanness and mechanical properties of the tube are required.
Used in hydraulic system, 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)
Applications:
hydraulic system
automobile
precision machinery parts for cars and cylinders.
Auto industry
Oil cylinder tube
Mechanical properties
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 |