high precision bright surface thick wall seamless tube ID 4.4mm, 5.4mm airgun barrel tube and pipe

Major OD 16mm and 12mm others also available

Tube size can be designed as per customers requirements

Best hardness and machining ability

Frequent sizes for usage

ID 4.4mm OD 12mm
ID 5.4mm OD 12mm
ID 5.4mm OD 15mm
ID 6.3 mm OD 15mm
ID 6.3 mm OD 16mm
ID 7.55mm OD 16mm

Others as per customer's requirements

ID tolerance can be controled within +/-0.02

Brigtht and Shinning inner and outer surface

Steel Grade: S45C, 4130,4140, 30CrMo, 42CrMo, 42CrMo4 and others

Good quality tubes consume less button for grooving

Special production Mechod

Other SIZEs for our production:

Outer Diameter: 1.5mm-60mm

Wall Thickness: 0.3mm to 10mm

Certificates:

According to EN 10204 3.1

Inspection Items: Tensile stength, Yield stength, Elongation, Flattenging, FlaringChemical analysisEddy Current

Test 100%, Size and surface checking 100%Other test item can be arranged as per request

DELIVERY CONDITIONS:

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

Some samples of related steel grade