Cold Drawn Fine Tolerance Precision Steel Tube

Precision in combination with a high quality surface finish are the features that characterise our fine tolerance steel tubing
ERW feedstock tubes are manufactured from specially prepared pickled, oiled and cold or hot rolled steel coil.
Resistance-pressure-welding Therefore, the weld is created from the base material without any filler material
The removal of the excess material, both internally and externally, is a key element in the manufacturing process and this is an in-house skill.
The cold drawing process occurs after annealing and raises the quality of the feedstock tube to vastly superior levels of tolerance, surface finish and final material mechanical properties.
In some instances the final finished product specification can be further fine tuned by further annealing. This is of particular interest in relation to products that are specifically manufactured to unique customer specifications.

Applications

Plastic injection molding machines, construction equipment, rubber molding machines, papermaking machines, printing machines, refrigeration equipment, foods and chemical machinery, loading equipment, fiber spinning equipment, textile machinery, agricultural equipment, automotives, shipbuilding and the like.

Quality:

1. Surface hardness Test

2. Surface roughness Test

3. Chrome thickness Test

4. OD tolerance Test

5. Charpy Test

6. Salt spray Test

7. Straightness Test

8. Mechanical properties Test

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After-sales service

Warranty period:

Hydraulic cylinder rods problems occur at warranty period for 1 year:

●New cylinder rod replace;

●Price discount in the next order;

●The "repair fee" pay: repair fee required to within a reasonable range: the cost of wantong repair problem hydraulic cylinder rod< repair fee < the cost of production of a new hydraulic cylinder rod;

●Deduct related goods value from payment.

●For strategic customers, one to one special treatment.