EN10305-2/3 Welded Steel Tube

  • EN10305-2 Welded & Redrawn Steel Tube

    • Precision in combination with a high quality surface finish are the features that characterise our fine tolerance steel tubing
    • ERW feedstock tubes are manufactured from specially prepared pickled, oiled and cold or hot rolled steel coil.
    • Resistance-pressure-welding Therefore, the weld is created from the base material without any filler material
    • The removal of the excess material, both internally and externally, is a key element in the manufacturing process and this is an in-house skill.
    • The cold drawing process occurs after annealing and raises the quality of the feedstock tube to vastly superior levels of tolerance, surface finish and final material mechanical properties.
    • In some instances the final finished product specification can be further fine tuned by further annealing. This is of particular interest in relation to products that are specifically manufactured to unique customer specifications.
  • Cold Rolled Shock Absorber Steel Tube

    Shock absorber precision steel tubes are suspension components that are responsible for absorbing the impact of avehicle’s movements. Through the shocks, the vehicle’s bounce cycle is cut short. If the car encounters abump on the road, it will still bounce; however, the shocks will shorten its bounce so that the driver and passengers will hardly feel it.

  • EN10305-3 Plastic Coating Welded Carbon Steel Tube

    The tubes shall be manufactured from steel strip by electric welding. The tubes shall not included welds used for joining of flat rolled strip prior to forming the tube.

    Possible surface conditions are :White plastic coating,Black plastic coating,Green plastic coating etc Other coating can be achieved after discussion.

    OD:18mm to 60mm WT:1.00mm to 3.00mm Length:6000mm to 12000mm

    Application:Used for the greenhouse cultivation,other construction purposes.

     

     

  • EN10305-3 welded precision tube for automotive industry

    The tubes shall be manufactured from steel strip by electric welding. The tubes shall not included welds used for joining of flat rolled strip prior to forming the tube, except for coiled tubes which may be supplied in the delivery conditions +A and +N

    Possible surface conditions are :

    S1 black  S2 pickled  S3 cold rolled  S4 coated to an agreed condition

    Note: The surface conditions S1 and S3 apply for the strip. The surface condition S2 and S4 may apply for the strip or the tube; the purchaser should, where necessary, indicate the condition at the time of enquiry and order.

    Tubes made of the steel grade E155 E195 E235 and E355 shall be supplied in the delivery condition +CR1 or +N. Tubes made of the grades E190 E220 E260 E320 E370 and E420 shall be supplied in the delivery conditions +CR2

  • EN10305-3 Low Carbon Steel Tube

    Steel Grade
    Chemical Composition
    Symbol
    Material Number
    C
    Max.
    Si
    Max.
    Mn
    Max.
    P
    Max.
    S
    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
    0.55
    1.60
    0.025
    0.025
    Steel Grade
    +C
    +LC
    +SR
    Name
    No.
    Rm
    Mpa
    A
    %
    Rm
    Mpa
    A
    %
    Rm
    Mpa
    ReH
    Mpa
    A
    %
    E155
    1.0033
    400
    6
    350
    10
    350
    245
    18
    E195
    1.0034
    420
    6
    370
    10
    370
    280
    18
    E235
    1.0308
    490
    6
    440
    10
    440
    325
    14
    E275
    1.0225
    560
    5
    510
    8
    510
    375
    12
    E355
    1.0580
    640
    4
    590
    6
    590
    435
    10
    Steel Grade
    +A
    +N
    Name
    No.
    Rm
    Mpa
    A
    %
    Rm
    Mpa
    ReH
    Mpa
    A
    %
    E155
    1.0033
    260
    28
    270–410
    155
    28
    E195
    1.0034
    290
    28
    300–440
    195
    28
    E235
    1.0308
    315
    25
    340–480
    235
    25
    E275
    1.0225
    390
    21
    410–550
    275
    21
    E355
    1.0580
    450
    22
    490–630
    355
    22
  • EN10305-3 Welded Precision Steel Tube

    EN10305-3 Welded cold sized tubes

    The tubes shall be manufactured from steel strip by electric welding. The tubes shall not included welds used for joining of flat rolled strip prior to forming the tube, except for coiled tubes which may be supplied in the delivery conditions +A and +N

    Possible surface conditions are :

    S1 black

    S2 pickled

    S3 cold rolled

    S4 coated to an agreed condition

    Note: The surface conditions S1 and S3 apply for the strip. The surface condition S2 and S4 may apply for the strip or the tube; the purchaser should, where necessary, indicate the condition at the time of enquiry and order.

    Tubes made of the steel grade E155 E195 E235 and E355 shall be supplied in the delivery condition +CR1 or +N. Tubes made of the grades E190 E220 E260 E320 E370 and E420 shall be supplied in the delivery conditions +CR2

  • EN10305-2 Welded Steel Tube

    EN10305-2 Welded Cold Drawn Steel Tube for Precision Applications

    1. Size Range: OD: 6-89mm, WT: 1-3mm, Length: 5.8m/6m, maximal 11.8m

    2. Stable Quality with Comeptitive Price

    3. NBK(Bright Annealing) Heat Treatment, Surface is clean and smooth, without oxide scale

    4. Good Extending and Bending Ability

    5.Surface Treatment can be:Black Phosphated,Zn-coated,etc

  • Black Phosphate Precision Tube

    Main Features: high accuracy, excellent brightness, no oxidization on the outer and inner walls after heat treatment, high cleanness inside wall. The steel tube is able to stand high pressure. No deformation after cold bending, no crack after flaring and flattening . The complicated geometrical forming and machining can be realized. bright black. Color is homogeneously distributed on the tube surface. The tube has good property of antirust.
    Main Application: to be used in hydraulic system, automobile and in the occasion where the high precision, brightness, cleanness and mechanical properties of the tube are required.

  • Olive Green Galvanized Steel Tube

    1. We use high quality raw materials for the olive green galvanized steel tube. All raw materials are supplied from internationally known steel makers.

    2. Each batch of raw material is checked for both chemical and mechanical properties, according to specifications.

    3. During the cold drawing process, our inspectors check every bundle three times: once at the beginning of the process, once during the middle, and finally, at the end of the cold drawing process.
    4. During the final heat treatment, every bundle has the surface checked, as well as mechanical properties through samplings.
    5. Non-destructive testing and manual inspection for each tube ensure the 100% quality rate before galvanization

  • Yellow Galvanized Steel Tube

    1. We use high quality raw materials. All raw materials are supplied from internationally known steel makers.

    2. Each batch of raw material is checked for both chemical and mechanical properties, according to specifications.

    3. During the cold drawing process, our inspectors check every bundle three times: once at the beginning of the process, once during the middle, and finally, at the end of the cold drawing process.
    4. During the final heat treatment, every bundle has the surface checked, as well as mechanical properties through samplings.
    5. Non-destructive testing and manual inspection for each tube ensure the 100% quality rate before galvanization

  • Cold Rolled Precision Steel Tube

    Synopsis of Process Routing: quality carbon steel → cold rolling→ bright heat treatment without oxidization (NBK status) → nondestructive testing. In the wall honing and inside flushing under the high pressure→. Antirust oiling outside surface→ plastic capping on both ends.
    Main Features: high accuracy, excellent brightness, no oxidization on the outer and inner walls after heat treatment, high cleanness inside wall. The steel tube is able to stand high pressure. No deformation after cold bending, no crack after flaring and flattening . The complicated geometrical forming and machining can be realized. Color of tube: gray with white.
    Main Application: to be used in hydraulic system, automobile and in the occasion where the high precision, brightness, cleanness and mechanical properties of the tube are required.

    Main grades:

    ST35,ST45,ST52,E215,E235,E355,etc

    Delivery Status:

    BK(+C),NBK(+N),Bright Annealed;etc

    Specifications:

    Outer diameter x wall thickness
    15~160mm x 0.6~5mm
  • White galvanized steel tubes

    When producing galvanized steel tubes, we utilize advanced technical processing and use a chemical liquid imported from Germany. Both the inner and outer surfaces of the high precision steel tubes can be galvanized, giving them a high homogeneity and an excellent rust resistant performance.
    Zinc wall thickness 8-12um, and customized as per customer requirements. Salt spray test: common requirements- 80-120 hours, high requirements- 120-300 hours Cr+6 free, environmental type

    Process Description

    Using a high precision, fine drawn bright seamless steel tube as the steel pipe for galvanizing, the outer wall of the steel pipe is cold-galvanized, and both ends are covered for dust protection.