4130 30CrMo chromly seamless thick wall tube OD16mm OD12mm
Standard: DIN 2391 EN 10305-1/4
OD:4-76mm
Wall thickness:0.5-8mm
Material:E215 E235 E355 ST35,ST37.4,ST45,ST52.4 4130 30CrMo etc
| Hydraulic steel tube |
| Standard |
|
Material |
Delivery |
Surface |
Sizes |
| DIN |
2391/1630/2445 |
ST37.4 ST52.4 |
NBK |
1) BA 2)Black phosphating 3) Galvanizing |
OD2 -60mm × WT0.3 -10mm |
| EN |
10305-4 |
E235 E355 |
(+)N |
|
| BS |
3602 |
CFS 360 |
|
Zinc Layer thickness more than 8um |
| Other steel grades also available upon request |
Delivery condition:
The tubes can be produced in the following delivery conditions:
BK (+C) Cold finished/hard (cold finished as drawn).
No heat treatment after the last cold forming process.
BKW (+LC) Cold finished/soft (lightly cold worked)
After the last heat treatment there is a light finishing pass (cold drawing).
BKS (+SR) Cold finished/stress relieve annealed.
After the final cold forming process the tubes are stress relieve annealed.
GBK (+A) Annealed.
After the final cold forming process the tubes are annealed in a controlled atmosphere.
NBK (+N) Normalized. (Mainly focus on)
After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere
