Torich International Limited
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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
