Kotec Hydraulic offers a wide dimensional range of cold drawn seamless (CDS) and cold drawn welded (CDW) tubes suitable for manufacturing of hydraulic or pneumatic cylinder. Inside bore is processed by two methods--Skiving & Roller Burnishing (SRB) or Honing.
Common Steel Grade Chemical Composition
| Grade |
C |
Si |
Mn |
S |
P |
| E355 |
<0.22 |
<0.50 |
<1.60 |
<0.025 |
<0.025 |
| ST52.3 |
<0.22 |
<0.55 |
1.20-1.60 |
<0.025 |
<0.025 |
| 1026 |
0.22-0.28 |
/ |
0.60-0.90 |
<0.035 |
<0.035 |
| P460 |
<0.20 |
<0.60 |
1.00-1.70 |
<0.025 |
<0.020 |
Common Steel Grade Mechanical Property
| STEEL GRADE |
T.S. |
Y.S. |
E.L. |
| PSI |
PSI |
% |
| E355 |
75,000(520MPa) |
87,000(600MPa) |
15 |
| ST52.3 |
75,000(520MPa) |
87,000(600MPa) |
15 |
| 1026 |
80,000(600MPa) |
90,000(620MPa) |
14 |
| P460 |
87,000(600MPa) |
101,500(700MPa) |
16 |
Cold Drawn Seamless Cylinder Tube
Size Range: ID 32-250mm
Straightness: 0.50mm/m max. (1.5mm max for the full length)
ID roughness: Ra < 0.40um (honing) Ra <0.20um (SRB)
ID tolerance: ISO H8
OD tolerance: As per EN10305-1
Wall deviation: OD <=120mm +/-7.5%, OD >120mm +/-10%
