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Torich Oil Cylinders Dom Steel Tubing , Carbon Steel Drawn Over A Mandrel Pipe

Minimum Order Quantity : 2 ton Price : USD 600-1200/Ton
Packaging Details : Packing in wooden box,hexagonal bundles or other seaworthy ways. Delivery Time : 15-25 days
Payment Terms : L/C, D/A, D/P, T/T, Western Union, MoneyGram Supply Ability : 60000 Ton/Year
Place of Origin: Zhejiang China Brand Name: TORICH
Certification: ISO 9001 ISO 14001 TS 16949 Model Number: EN10305-2

Detail Information

Product Name:: EN10305-2 Welded Precision Cold Drawn DOM Steel Tube For Motorcycle Shock Absorbers Material:: E155 E195 E235 E275 E355
Surface:: With Anti Rust Oil Application:: Auto Shock Absorber Inner Cylinder, Telescopic Cylinders
Shape:: Round OD:: 50-350mm
WT:: 0.5-35mm Length:: 0.1-12.5m
Tolerance:: According To The Following Tables Or Customers’ Request. Spec:: General Length:4-12.5m
High Light:

welded steel pipe


electric resistance welded steel tube

Product Description


EN10305-2 DOM Steel Tubing for Oil Cylinders E155 E195 E235 E275 E355



EN10305-2 Welded Precision Cold Drawn Steel Tubes

for Auto industry

for machinery use

Oil Cylinder Tube

Motorcyle shock absorber
Auto shock absorber innder cylinder

Telescopic Cylinders

Size range: O.D.:6-350mm W.T.:1-35mm L:max12000mm


Steel Grade:

E155, E195, E235, E275, E355.


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!


For Application of:

Oil Cylinder Steel Tubes Steel Tubes for Oil Cylinders



Test Methods:

Tensile test


Flattening test


Drift expanding test


Dimensional inspection


Roughness measurement


Visual examination


Not-destructive testing

a. Test for longitudinal imperfections-

- Eddy current test - EN10246-3, level E3

- ultrasonic testing - EN10246-7, level U3


b. Leak-tightness

- Non-destructive testing for verification of leak-tightness shall be carried out in accordance with EN10246-1



EN10305 Consists of the following Parts under the general title " Steel tubes for precision applications - Technical delivery conditions "


Part 1: Seamless Cold Drawn Tubes


Part 2: Welded Cold Drawn Tubes


Part 3: Welded Cold Sized Tubes


Part 4: Seamless Cold Drawn Tubes for Hydraulic and Pneumatic Power Systems


Part 5: Welded and Cold Sized Square and Rectangular Tubes


Part 6: Welded Cold Drawn Tubes for Hydraulic and Pneumatic Power Systems


Normative references:


EN10002-1, Metallic materials - Tensile Testing - Part 1: Method of test at ambient temperature


EN10020, Definition and classification of grades of steel


EN10021, General technical delivery requirements for steel and iron products


EN10027-1, Designation systems for steel - Part 1 : Steel names, principal symbols


EN10027-2, Designation systems for steel - Part 2: Numerical systems


EN10052, Vocabulary of heat treatment terms for ferrous products.


EN10204, Metallic products - Types of inspection documents


EN10233, Metallic materials - Tube - Flattening Test


EN10234, Metallic materials - Tube - Drift expanding test


EN10246-1, Non-destructive testing of steel tubes - Part 1: Automatic electromagnetic testing of seamless and welded ( except submerged arc-welded) ferromagnetic steel tubes for verification of hydraulic leak-tightness


EN10246-3, Non-destructive testing of steel tubes - Part 3: Automatic eddy current testing of seamless and welded (except submerged arc-welded) steel tubes for detection of imperfections


EN10246-5, Non-destructive testing of steel tubes - Part 5: Automatic full peripheral magnetics transducer/flux leakage testing of seamless and welded ( except submerged arc-welded) ferromagnetic steel tubes for the detection of longitudinal imperfections


EN10246-7, Non-destructive testing of steel tubes - Qualification and competence of level 1 and 2 non-destructive testing personnel.


EN ISO377, Steel and Steel products - Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997)


EN ISO 2566-1, Steel - Conversion of elongation values - Part 1: Carbon and Low alloy steels (EN102566-1:1984)


EN 10168, Iron and steel products - Inspection documents - List information and description


ENV10220, Seamless and welded steel tubes - Dimensions and masses per unit length


EN10266, Steel Tubes, fittings and structural hollow sections - Definitions and symbols for use in product standards


EN ISO 4287, Geometrical product specifications (GPS) - Surface Texture: Profile method - Terms, definition and surface texture parameters ( ISO 4287:1997)



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.



Q: Are you trading company or manufacturer ?
A: A professional steel pipes materials inventor, manufacturer and solution provider
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 30-60 days if the goods are not in stock, and it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but you need to pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance , balance before shippment.
If you have another question, pls feel free to contact us

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