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Help CenterPrecision Welded Cold Drawn DOM Steel Tube for Oil Cylinders ISO 9001-2008
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Certification:ISO 9001-2008 ISO 14001 TS 16949 DNV ABS
EN10305-2 Welded Precision Cold Drawn Steel Tubes
Application:
for Auto industry for machinery use Oil Cylinder Tube Motorcyle shock absorberAuto shock absorber innder cylinder Telescopic Cylinders
Applications: for Auto Industry/for Machinery Use/Oil Cylinder Tube/Motorcyle Shock Absorber
Auto shock absorber innder cylinder/Telescopic Cylinders
Size range: O.D.:6-420mm W.T.:1-50mm L:max12000mm
Supplying Steel Grade:
E155, E195, E235 E275, E355
Delivery Condition:
+C, +Lc, + SR, +A, +N
Production Method:
DOM, ERW+ Cold Drawn
ID Honing + Roller Burnish+ Skiving
Appearance:
The internal and external surface finish of the tubes is smooth, while the Weld Seam is somehow not visible or tangible.
The ID surface with roughness Ra≤4μm, the best ID smoothness we could reach Ra≤0.8μm
The inner surface can be measured and reported if this is requested by the purchaser before PO.
| Mechanical properties at room temperature | |||||||||||||
| Steel Grade | Minimum values for the delivery conditiona b | ||||||||||||
| Steel Name | (+Cc) | (+LCc) | (+SR) | (+Ad) | (+N) | ||||||||
| Rm Mpa | A % | Rm Mpa | A % | Rm Mpa | ReH Mpa | A % | Rm Mpa | A % | Rm Mpa | ReHe Mpa | A % | ||
| E155 | 1.0033 | 400 | 6 | 350 | 10 | 350 | 245 | 18 | 260 | 28 | 270-410 | 155 | 28 |
| E195 | 1.0034 | 420 | 6 | 370 | 10 | 370 | 260 | 18 | 290 | 28 | 300-440 | 195 | 28 |
| E235 | 1.0308 | 490 | 6 | 440 | 10 | 440 | 325 | 14 | 315 | 25 | 340-480 | 235 | 25 |
| E275 | 1.0225 | 560 | 5 | 510 | 8 | 510 | 375 | 12 | 390 | 21 | 410-550 | 275 | 21 |
| E355 | 1.0580 | 640 | 4 | 590 | 6 | 590 | 435 | 10 | 450 | 22 | 490-630 | 355 | 22 |
Note: Special steel grade is also available, according to customer request.
Quality Inspection standard and Normative references:
EN10002-1, Metallic materials- Tensile testing- Part 1: Method of test at ambient temperaure
EN10020, Definition and classification of grades of steel
EN10021, Gengeral technical delivery requirements for steel and iron products.
EN10027-1, Designation systems for steel - Part 1: Steel names, principlal symbols.
EN10027-2, Designation systems for stee l- Part 2: Numerial system
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 suberged 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 the detection of imperfections
EN10246-5, Non-Destructive testing of steel tubes - Part 5: Automartic full peripheral magnetic transducer /flux leakage testing of seamless and welded (except submerged arc-welded) ferromagnetic steel tubes for the detection of longtitudinal imperfections
EN10246-7, Non-Destr
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