Seamless Cold Drawn DIN2391 17mm Precision Steel Tube for Hydraulic System

Seamless Cold Drawn DIN2391 17mm Precision Steel Tube for Hydraulic System

Quality grades
Tubes shall be supplied in the following quality grades:
for precision steel tubes, that do not require an inspection certificate and thus are not subject to special requirements, grade A;
for precision steel tubes subject to special requirements, grade C.
In accordance with the stated demands of the purchaser, such special requirements and the relevant test methods shall

be the subject of agreement.

Main feature

High precision, Excellent brightness, No oxidization on outer and inner walls after heat treatment

High cleanness of inside wall, High pressure, No deformation after clod bending, No crack after flaring and flattening

Type of test or inspection
Tensile test, Flattening test, Drift expanding test, Measurement of surface roughness
Dimensional check, Surface inspection, Leak tightness test, Non-destructive test,

Physis laboratory, Chemical spectrometer, Pressure blasting machine, Metallographic analysis, Salt Spray Test

Delivery Condition: BK(+C), BKW(+LC), BKS(+SR), GBK(+A),NBK( +N)

Quality Control:

1. Incoming Raw Material Inspection

2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing and Cold Rolling, on line inspection
5. Heat Treatment, +A, +SRA, +LC, +N, Q+T
6. Straightening-Cutting to specified length-Finished Measuring Inspection
7. Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8. Packing and Stocking

100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects

Product Display of Precison Steel Tube for Hydraulic System

Packing & Delivery