Applications:
for Auto industry
for machinery use
Oil Cylinder Tube
Motorcyle shock absorber
Auto shock absorber innder cylinder
Telescopic Cylinders
Size range:
ID.: 20-650mm W.T.:1-50mm L:max12000mm
Steel Grade:
E155, E195, E235, E275, E355. S45C
Steel Grade and Chemical Compositions
Steel Grade | C | Si | Mn | P | S | |
Steel Name | Steel Number | max | max | max | max | max |
E155 | 1.0033 | 0.11 | 0.35 | 0.70 | 0.025 | 0.025 |
E195 | 1.0034 | 0.15 | 0.35 | 0.70 | 0.025 | 0.025 |
E235 | 1.0308 | 0.17 | 0.35 | 1.20 | 0.025 | 0.025 |
E275 | 1.0225 | 0.21 | 0.35 | 1.40 | 0.025 | 0.025 |
E355 | 1.0580 | 0.22 | 0.35 | 1.60 | 0.025 | 0.025 |
Heat treatment method:
+Cc, +LCc, +SR, +Ad, +N
Note: Special steel grade is also available, according to customer request.
Please specify the steel grade and heat treatment mothod when sending the enquiry!
ID Honing
The honing process makes :
1.Smooth surface finishes inside bores
2.Hold precise tolerances on bore diameters
ID H7 H8 H9
ID roughness 0.2-0.8μm
ID max 630mm
Two thin chips are cut at high feed rate while the tool passes through the workpiece.producing super finish surface,with a bore precise tolerance .
ID H7 H8 H9
ID roughness 0.2-0.8μm
ID max 630mm
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.
Packing Details : In bundles or in wooden boxes packaging of honed tube
Delivery Details : 30-60days