High Precision Steel Pipe for Gas spring Cylinder 

Roughness ≤0.3ra

 Material E195-E235,Q195-Q235,#10,#20,#45,SAE1010,SAE1020

Surface:Black/bright 

Standard:DIN, GB, JIS, DIN 17175, DIN 2391, GB 5310-1995, GB/T 13793-1992, GB/T 3094-2000, GB/T 8163-1999, JIS G3101

Size :OD 3mm-140mm  Thickness 0.5-20mm

Processing :Cold rolled /cold drawn

                                                                 1. BK (+C)    No heat treatment after last cold forming process.

2. BKW (+LC) After last heat treatment there is a light finishing pass (cold drawing)

3. BKS (+SR) After the final cold forming process the tubes are stress relieve annealed.

4. GBK (+A) After the final cold forming process the tubes are annealed in a controlled atmosphere.

5. NBK (+N) After the final cold forming process the tubes are annealed above the upper 

Woven bag / wooden or crate carton/ Bundle Packing/ Plain end or vanished as per customer's request.

Usage: Gas Spring Cylinder