DIN2391-1/EN10305-1
GB/T 3639/ Cold drawn or cold rolled precision seamless steel tubes
GB/T8713 / inside precision seamless tubes for hydraulic pressure and pneumatic services.
Application: for AUTO use; for machinery use; oil cylinder tube; motorcycle shock reducer steel tubes; Auto shock reducer inner cylinder
|
|
BK |
BKW |
BKS |
GBK |
NBK | |||||||
|
Steel grade |
Tensile point |
Elongation |
Tensile point |
Elongation |
Tensile point |
Yield point |
Elongation |
Tensile point |
Elongation |
Tensile point |
Yield point |
Elongation |
|
St35 |
480 |
6 |
420 |
10 |
420 |
315 |
14 |
315 |
25 |
340-470 |
235 |
25 |
|
St45 |
580 |
5 |
520 |
8 |
520 |
375 |
12 |
390 |
21 |
440-570 |
235 |
21 |
|
St52 |
640 |
4 |
580 |
7 |
580 |
420 |
10 |
490 |
22 |
490-630 |
355 |
22 |
|
Steel grade |
Minimum values for the delivery condition | ||||||||||||
|
Steel name |
Steel number |
+C |
+LC |
+SR |
+A |
+N | |||||||
|
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 |
450 |
10 |
450 |
22 |
290-430 |
355 |
22 |