EN10305-2 Welded Steel Tubes with Precision Cold Drawn Steel Tubes
for Mechanical / Automotive Application
EN10305-2 Welded Precision Cold Drawn Steel Tubes
Applications: for Auto industry/for Machinery use/Oil Cylinder Tube/Motorcyle
Shock Absorber innder cylinder/Telescopic Cylinders
Quick Detail:
Size Range: O.D.:6-350mm W.T.:1-35mm L:max12000mm
Steel Grade: E195, E237, E275, E355,
Description:
ERW+ DOM
The tubes are manufactured from eclectric welded pre-tubes by cold
drawing or other suitable processes.
The tubes not include welds used for joining lengths of flat rolled
strips prior to forming the pre-tube
Description:
Mechanidal tubing made from hot or cold-rolled steel.
Covers electric-resistance-welded low carbon steel tubing for use
as mechanical tubing
Advantage:
Good concentricity, Better price than seamless.
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 |
| 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 |
aRm: tensile strength; ReH: upper yield strength; A: elongation
after fracture
b 1Mpa=1N/mm2
c Depending on the degree of cold work in the finishing pass the
yield strength may nearly be as high as the tensile strength.
For calculation purposes the following relations are recommended:
for delivery condition +C: ReH ≥0.8 Rm
for delivery condition +LC: ReH ≥0.7 Rm
d For calclulation purposes the following relation is
recommended:ReH≥0.5Rm
e For tubes with outside diameter ≤30mm and wall thickness ≤3mm the
ReH minimim values are 10Mpa lower than the values given in this
Table
Note: Special steel grade is also available, according to customer
request.
Applications:
Auto industry/for Machinery use/Oil Cylinder Tube/Motorcyle Shock
Absorber
innder cylinder/Telescopic Cylinders
Competitive Advantage:
Good source of raw material from Bao Steel.
Prompt delivery time according to PO and agreement.
Produce exactly according to standard and customer's requirement.
Experienced export team for customer service, quick reply within 24
hours.
Production Site:
Test Methods:
Tensile test
Flattening test
Drift expanding test
Dimensional inspection
Roughness measurement
Visual examincation
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 ( execpt
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 ( expcept 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 preparetion 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 structrual 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)
