Zinc Coated Seamless DIN 2391 EN 10305-1 Galvanized Steel Tube with API ISO , 0.6mm - 8mm

diameter between 4 - 30 mm

±0,08 mm

diameter between 35 - 38 mm

±0,15 mm

diameter above 42 mm

±0,20 mm

EN 10305-1/ EN 10305-4 / DIN 2391

Precision seamless tube and pipe with European&Germany standard

Application:

for Atuo;for machinery use; Oil cylinder tube; Motorcycle shock reducer steel tubes; Auto shock reducer inner cylinder.

Size(mm):

O.D.:6mm-350mm ; W.T.:1-30mm; L:max 24000

Designation

Symbol

Description

Cold finished (hard)

BK

Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation.

Cold finished (soft)

BKW

The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding).

Cold finished and stress-relieved

BKS

Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.

Annealed

GBK

The last cold forming process is followed by annealing in a controlled atmosphere.

Normalized

NBK

The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

Galvanized tube category and related standard

Galvanized tube category

Related Standard

Zinc coating thickness

Salt spray test 

Gr3+ Galvanized tube with blue and white zinc