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DIN2391 BKW BKS GBK NBK Seamless Precision Cold Drawn Steel Tubes

Categories Seamless Steel Tube
Brand Name: TORICH
Model Number: DIN 2391
Certification: ISO 9001 ISO 14001 TS 16949 EN 10204.3.1 CCS PED
Place of Origin: China
MOQ: 5 tons
Price: USD 600-1200 ton
Supply Ability: 60000 tons per year
Delivery Time: 5-8weeks
Packaging Details: oil antirust In hexagonal Bundles
Material: Carbon Steel
Steel grade: ST 35 ST 45 ST 52
Standard: DIN 2391
Shape: Round
Applications: for Auto industry / for machinery use / Oil Cylinder Tube / Motorcycle shock absorber
Production method: Seamless Cold Drawn/Rolling
Size range: O.D.:6-350mm W.T.:1-50mm L:max12000mm
Delivery condition: BKW BKS GBK NBK
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    DIN2391 BKW BKS GBK NBK Seamless Precision Cold Drawn Steel Tubes

    DIN2391 St35.0 St37.0 St44.0 St45St52.0 BKW BKS GBK NBK Seamless Precision Cold Drawn Steel Tubes


    Standard: DIN2391 Seamless Cold Drawn/Rolling Steel Tubes


    Applications: for Auto industry / for machinery use / Oil Cylinder Tube / Motorcycle shock absorber


    Auto shock absorber inner cylinder / Telescopic Cylinders


    Size range: O.D.:6-350mm W.T.:1-50mm L:max12000mm


    Materials:

    The tubes are manufactured from electric steel or basic oxygen stel, the melting and casting processes being at the discretion of the manufacturer.

    The steel is cast as killed steel


    Apperance:

    Tubes have a smooth internal and external surface with the cold working process


    Tube ends:

    Square cut, no burrs

    Steel Grade and Chemical Compositions:

    Steel GradeCSiMnPS
    maxmaxmaxmax
    ST350.170.35≥0.400.0250.025
    ST450.210.35≥0.400.0250.025
    ST520.220.35≥1.600.0250.025

    Mechanical properties at room temperature
    Steel GradeMinimum values for the delivery condition
    BKWBKSGBK(+N) NBK
    ST3548064201042031514340-47023525
    ST455805520852037512440-57023521
    ST526404580758042010490-63035522


    Note: Special steel grade is also available, according to customer request.


    Final Supply Condition:

    BK - Cold finish (hard)

    Tubes do not undergo heat treatment following the final cold forming and, thus

    have a rather high resistance to deformation


    BKW - Cold finished(soft)

    The final heat treatment is followed by cold drawing involving limited deformation.

    Appropriate further processing allow a certain degree of cold forming (bending,

    expanding)


    BKS - Cold finished and stress-relieved

    Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.


    GKB - Annealed

    The last cold forming process is followed by annealing in a controlled atmosphere.


    NBK - Normalized

    The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.


    Testing:

    1. dimensional chec

    2. surface inspection

    3. tensile test as DIN EN10002 Part 1

    4. flattening test, as DIN EN10233

    5. drift expanding test as DIN EN10234



    DIN2391-1 standard does not cover the following standard:

    -seamless circular unalloyed steel tubes subject to special requirements ( DIN1629)

    -high performance seamless circular unalloyed steel tubes (DIN1630)

    -seamless circular steel tubes for structural steel work (DIN17121)

    -seamless circular fine grain steel tubes for structural steelwork (DIN17124)

    -seamless circular tubes made from steel with low-temperature toughness (DIN17173)

    -seamless tubes made from steel with elevated temperature properties (DIN17175)

    -seamless circular fine grain steel tubes subject to special requirements (DIN17179)

    -seamless circular austenitic stainless steel tubes subject to special requirements (DIN17458)

    -steel pipes for conveying combustible liquids and gases (DIN17171)


    Quality DIN2391 BKW BKS GBK NBK Seamless Precision Cold Drawn Steel Tubes wholesale
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