Superior Steel Overseas
Girgaon, Mumbai, Maharashtra
GST No. 27ABOFS2693A1ZZ
Call 08046062864
Cold Drawn Tubes
COlD DRAWN TUBES:
GERNERAL FEATURES
These products are Manufactured by cold drawing of seamless and welded fully killed steel tubes.This Particular process assures a high dimensionals precision,while different kind of following heat treatments are used to reach different levels in mechanical properties.
Types
The different kinds of cold drawn tubes ready on stock cover a wide range of applications :
-
COLD DRAWN SEAMLESS AND WELDED TUBES SUITABLE FOR HONING
-
COLD DRAWN SEAMLESS AND WELDED TUBES INSIDE H8
-
COLD DRAWN SEAMLESS TUBES FOR SHAFTS
-
WELDED SMOOTH BORE CYLINDER TUBES INSIDE H9 OR H10.
-
COLD DRAWN SEAMLESS TUBES FOR HYDRAULIC AND PNEUMATIC POWER SYSTEMS.
STEELGRADES AND DELIVERY CONDITIONS
1.COLD DRAWN/HARD
( Cacc.EN10305/BK acc.DIN2391)
No heat treatment after final cold drawing.
2.COLD DRAWN/SOFT
( LC acc.EN10305/BKWacc.DIN2391)
The final heat treatment is followed by a suitable drawing pass
(limited reduction of area)
3.STRESS RELIEVED
( SRacc.EN10305/BK Sacc.DIN2391
After the final cold drawing process,tubes are stress relieved in controlled atomosphere in order to reduce work hardening due to the cold forming process.
4.ANNEALED
(Aacc.EN10305/GBKacc.DIN2391)
After final cold drawing process,tubes are annealed in controlled atomosphere.
Seamless and Welded Cold Drawn Tubes
| Usage | Industry |
| Type | Welded |
| Grade | SS304 |
| Material | Steel |
| Hollow Sections | Circular |
| Color | Black |
Applications:
These tubes are intended to resist internal pressure and are therefore used for the manufacture of cylinders. They are produced in all the sizes used for hydraulic and pneumatic applications, in different steel grades and delivery conditions.
Norms:
- Cold Drawn Seamless Tubes - En 10305-1
- Cold Drawn Welded Tubes - En10305-2
Dimensional Tolerances According To En 10305-1/2:
- W.T.: welded tubes: ±7.5% with a minimum ±0.1 mm
- seamless tubes: ±10% with a minimum ±0.1 mm
Eccentricity: welded tubes: ≤ 7.5%, seamless tubes: ≤ 10%
Straightness: for OD ≤ 260 mm
- if ReH ≤ 500 Mpa 0.0015 L
- if ReH > 500 Mpa 0.002 L
for ID >260 mm
- if ReH ≤ 500 Mpa 0.0025 L
- if ReH ≤ 500 Mpa 0.003 L
L= total length of the tube, max. values to be checked on the total tube length.
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Honed Tubes
General Features:
Chemical and mechanical features are the same as the raw tube (see steels-table for cold drawn tubes suitable for honing), which is machined on ID. The dimensional tolerances are the same as the raw tube, except for the ID, which is according to H8.
Norms:
- Cold Drawn Seamless Tubes EN 10305-1
- Cold Draw Welded Tubes EN 10305-2
- Dimensional Features Of The ID EN 20286
Tubes suitable for shafts Applications:
It is used for cylinders on self-propelled cranes, hydraulic systems for lifts, tipping pistons and telescopic cylinders for automotive and hydraulic platforms. They can replace solid piston rods for pneumatic cylinders in order to reduce mass forces in high-speed pistons.
Norms: EN 10305-1
Tolerances & Sizes
ID: standard stock material is according to EN 10305-1. In the case of tubes suitable for telescopic cylinders, that can be supplied on request, the tolerance allowing the machining also on the ID has to be agreed at the time of the order.
W.T.: ± 10% with a minimum of ±0.1 mm
Max.W.T.- Min W.T.
Eccentricity: *100
Max.W.T.+ Min W.T.
Straightness
for OD ≤ 260 mm
- if ReH ≤ 500 Mpa 0.0015 L
- if ReH > 500 Mpa 0.002 L
for OD >260 mm
- if ReH ≤ 500 Mpa 0.0025 L
- if ReH > 500 Mpa 0.003 L
Additional Information:
- Item Code: H8
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Welded Smooth Bore Cylinder Tubes
Applications:
These tubes are construction elements, ready for the assembly of hydraulic and pneumatic cylinders.
Norms:
Cold Drawn Welded Tubes EN 10305-2
Dimensional Features Of The ID EN 20286
Dimensional Tolerances:
For steel grade E235,tolerance H10 with roughness(Ra) below 1 micron(µm).
For steel grade E335,tolerance H9 with roughness(Ra) below 0.8 micron(µm).
W.T.: ± 7.5% with a minimum of ±0.1 mm
Max.W.T.- Min W.T.
Eccentricity: *100 ≤ 7.5%
Max.W.T.+ Min W.T.
Straightness:
for OD ≤ 260 mm
- se ReH ≤ 500 Mpa 0.0015 L
- se ReH > 500 Mpa 0.002 L
for OD >260 mm
- se ReH ≤ 500 Mpa 0.0025 L
- se ReH > 500 Mpa 0.003 L
L= total length of the tube, the max. values to be checked on the total tube length.
Additional Information:
- Item Code: H9-H10
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