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  • EN 10305-1 Precision Seamless cold drawn tubes
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  • EN 10305-1 E215, E235, E355  Precision Seamless cold drawn tubes

    Standard:EN 10305-1
    EN 10305-1 specifies the technical delivery conditions for seamless cold drawn steel tubes of circular cross section for precision applications with specified outside diameter D ≤ 380 mm.
    Typical fields of application are in the automotive, furniture and general engineering industries.

    Main Grade:

    E215,  E235,  E355


    EN 10305-1 Precision Seamless Cold Drawn Tubes Quick Details
    Company Name: Beite steel pipe
    Country/Region: China
    FOB Price: US $1600-2500/Ton | 1 Ton/Tons (Min. Order)
    Port of Shipment: Tianjin, China
    Payment: L/C or T/T
    Delivery: 7-15 days after payment
    Package: Standard export package, suit for all types of transport, or as required
    Certificate: ISO 9001-2000, PED 97/23/EC, ASME, DNV
    EN 10305-1 Precision Seamless Cold Drawn Tubes Dimensional Range & Specification
    Outside Diameter: 4.0mm - 167mm
    Wall thickness: 3.5mm - 15.0mm
    Length: 6000mm, 12000m or specified length as required.

    Manufacturing process
    Steelmaking process:Steels shall be fully killed.
    Tube manufacture and delivery conditions
    The tubes shall be manufactured from hot finished seamless hollows by cold drawing.
    The tubes shall be supplied in one of the delivery conditions given in Table 1.
    Table 1 — Delivery conditions
    Designation Symbol a Description
    Cold drawn / hard +C No final heat treatment after final cold drawing.
    Cold drawn / soft +LC Final heat treatment is followed by a suitable drawing
    pass (limited reduction of area).
    Cold drawn and stress relieved +SR After final cold drawing the tubes are stress relieved in
    a controlled atmosphere.
    Soft annealed +A After final cold drawing the tubes are soft annealed in a
    controlled atmosphere.
    Normalized +N After final cold drawing the tubes are normalized in a
    controlled atmosphere.
    a  In accordance with EN 10027–1.  
    Chemical composition of EN 10305-1 Precision Seamless cold drawn tubes
    Table 2 — Chemical composition (cast analysis)
    Steel grade 
    % by mass 
    Steel name Steel
    S  a
    Al total  b min.
    E215 1.0212 0,10 0,05 0,70 0,025 0,025 0,025
    E235 1.0308 0,17 0,35 1,20 0,025 0,025 0,015
    E355 1.0580 0,22 0,55 1,60 0,025 0,025 0,020
    Elements not quoted in this table (but see footnote b ) shall not be intentionally added to the steel without the agreement of the purchaser, except for elements which may be added for the purposes of deoxidation and/or nitrogen binding. All appropriate measures shall be taken to prevent the addition of undesirable elements from scrap or other materials used in the steel making process.
    a   See option 2.
    b  This requirement is not applicable provided the steel contains a sufficient amount of other nitrogen binding elements, such as Ti, Nb or V. If added, the content of these elements shall be reported in the inspection document.When using titanium, the manufacturer shall verify that (Al + Ti/2) ≥ 0,020.
    Note: For the steel grades E235 and E355 a controlled sulphur content of 0,015 % to 0,040 % is specified to support machinability. It shall be obtained by resulphurizing the steel after maximum desulphurization or alternatively by using a low oxygen process.
    Mechanical properties
    Table 4 — Mechanical properties at room temperature

    Steel grade Minimum values for the delivery condition a
    +C b   +LC b   +SR     +A c   +N    
    R m
    R m
    R m
    R eH
    R m
    R m
    R eH d
    E215 1.0212 430 8 380 12 380 280 16 280 30 290 to 430 215 30
    E235 1.0308 480 6 420 10 420 350 16 315 25 340 to 480 235 25
    E355 1.0580 640 4 580 7 580 450 e 10 450 22 490 to 630 355 22
    a   R m : tensile strength; R eH : upper yield strength (but see 11.1); A: elongation after fracture. For symbols for the delivery condition see Table 1.
    b  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 relationships are recommended:
    — for delivery condition +C: R eH ≥ 0,8 R m ;
    — for delivery condition +LC: R eH ≥ 0,7 R m .
    c For calculation purposes the following relationship is recommended: R eH ≥ 0,5 R m .
    d  For tubes with outside diameter ≤ 30 mm and wall thickness ≤ 3 mm the R eH minimum values are 10 MPa lower than the values given in this table.
    e   For tubes with outside diameter > 160 mm: R eH ≥ 420 MPa.
    NOTE :Subsequent processing (cold or hot) may change the mechanical properties.
    Dimensions and tolerances

    Dimensional tolerance range according to EN 10305-1 standard.

    Appearance and internal soundness

    The internal and external surface finish of the tubes shall be typical of the manufacturing process and, where applicable, the heat treatment employed.
    Preparation of ends
    The tubes shall be delivered with square cut ends. The ends shall be free of harmful burrs.

    Chemical analysis
    Tensile test
    Dimensional inspection
    Visual examination
    Non-destructive testing
    Flattening test or drift expanding test
    Roughness measurement
    NDT on longitudinal imperfections
    NDT for verification of leak tightness
    The following marking shall be shown on a label attached to the package unit or, where necessary for identification, to the single tube:
    a) the manufacturer's name or trade mark;
    b) the specified dimensions;
    c) the number of this Standard;
    d) the steel name or number;
    e) the delivery condition;
    12 000 m tube with an outside diameter of D = 60 mm and an inside diameter of d = 56 mm in
    Made of steel grade E235 in the normalized condition, delivered in random lengths, with a 3.1 inspection certificate in accordance with EN 10204:
    12 000 m tube – D 60 x d 56 – EN 10305-1 – E235+N – random length – inspection certificate 3.1

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