TORICH INTERNATIONAL LIMITED
TORICH INTERNATIONAL LIMITED The Steel Tube Maker
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ASTM A519 Automotive Steel Tube For Automobile Shock Absorber
In the suspension system, the elastic element vibrates due to impact. In order to improve the driving smoothness
of the vehicle, the shock absorber is installed in parallel with the elastic element in the suspension. In order to
attenuate the vibration, the shock absorber used in the vehicle suspension system is mostly hydraulic shock
absorber. Its working principle is that when there is relative movement due to vibration between the frame
(or body) and the axle, the piston in the shock absorber moves up and down, The oil in the shock absorber
cavity repeatedly flows from one cavity through different pores into another cavity. At this time, the friction
between the hole wall and the oil and the internal friction between the oil molecules form a damping force on
the vibration, so that the vehicle vibration energy is transformed into oil heat energy, which is absorbed and
emitted into the atmosphere by the shock absorber. When the oil channel section and other factors remain
unchanged, the damping force increases or decreases with the relative motion speed between the frame
and the axle (or wheel), and is related to the oil viscosity.
The shock absorber and elastic element undertake the task of mitigating impact and shock absorption.
Excessive damping force will deteriorate the elasticity of the suspension and even damage the shock
absorber connector. Therefore, the contradiction between elastic element and shock absorber should be adjusted.
Carbon Steel :
ASTM A519 Standard : MT1010, MT1020, 1008, 1010, 1018, 1020, 1025, 1030, 1045, 1518
imension length:
Mechanical steel pipes are usually supplied according to the rolling length of 5 feet (1.5m) and more.
If the demander specifies the specifications in detail, the goods shall be supplied according to the
determined fixed length
Size Range:
OD : 6-325mm -0.035 -- +0.045mm
ID: 2-250mm ±0.035mm
WT : 1-32mm depends on sizes
Length : random or fixed length +0-3.5mm
Straightness : 0.15:1000, 0.4:1000, 0.5:1000 1:1000 or customized
Surface Roughness : Ra 0.02—0.4μm
