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DIN2391 Cold Drawn Precision Steel Tubing Bright Annealed Seamless Steel Tube

DIN2391 Cold Drawn Precision Steel Tubing Bright Annealed Seamless Steel Tube

Categories Precision Steel Tubing
Brand Name: YAXIN
Certification: TS16949, ISO9001, OHSAS18001
Place of Origin: China
MOQ: 1000kg
Payment Terms: L/C, T/T
Supply Ability: 500 metric tons per month
Delivery Time: 30 days
Packaging Details: Wooden case
Material: ST35, ST37, ST37.4, ST45, ST52, ST52.4
Shape: Round
Type: seamless precision tube
Condition: +N, +C, +A, +SR
SURFACE: Bare Tube (No coating)
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    DIN2391 Cold Drawn Precision Steel Tubing Bright Annealed Seamless Steel Tube

    Cold Drawn Seamless Precision Steel Tube , DIN 2391 St35 St37, St45, St52 Bright Annealed Tube


    Brief Introduction:

    Standard: DIN 2391 EN10305-1, EN10305-4, BS 6323, ISO 8535

    Grade: St 30 Si / St 30 Al / St 35 / St37 / St37.4 / St45 / St 52 / St52.4 / E215 / E235 / E355
    Out Dimensions: 6 mm ~ 350 mm
    Wall Thickness: 0.8 mm ~30mm
    Length: Fixed(6m,9m,12,24m) or normal length(5-12m)


    Precision steel tube
    Precision in size,Bright surface, high mechanical performance

    Standard: DIN 2391, EN10305-1, EN10305-4, BS 6323, ISO 8535

    STEEL GRADE: ST30Si, ST30Al, ST35, ST37, ST37.4, ST45, ST52, ST52.4, etc


    SURFACE TREATMENTS

    1. Bare Tube (No coating): Bright and smooth, Surface Roughness both inner and outer surface 0.35Ra Maximum for special requirement

    2. Surface Coating

    A. Silver galvanized

    B. Yellow galvanized

    C. Olive green coated

    Layer thickness: 8-20um, Salty Spray Test: 48-150 hours

    3. Black phosphate


    APPLICATIONS

    1. Automotive industry

    A. Fuel injection lines/nozzles

    B. CNG (Compressed Nature Gas) tube-- Burst pressure: 1307Bar, Working Pressure: around 350bar

    C. Drive transmission: Steering column elements

    D. Gear shafts, hand brake, front axles, airbag inflators, stabilizers, seat fasteners, front-wheel drive shafts

    2. Hydraulic Fields

    A. Hydraulic circuits (HPL), pneumatic lines, and hydraulic suspension

    B. Hydraulic cylinders (HPZ)


    Chemical Composition:

    Steel gradeChemical composition, as a percentage by mass
    SymbolMaterial numberC
    max.
    Si
    max.
    MnP
    max.
    S
    max.
    St 30 Si1.02110.100.30<=0.550.0250.025
    St 30 Al1.02120.100.05<=0.550.0250.025
    St 351.03080.170.35<=0.400.0250.025
    St 451.04080.210.35<=0.400.0250.025
    St 521.05800.220.55<=1.600.0250.025
    The following alloying elements may be added: Nb: <=0,03%; Ti: <=0,03%; V: <=0,05%; Nb + Ti + V: <=0,05%.

    Final supply conditions:

    DesignationSymbolDescription
    Cold finished (hard)BKTubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation.
    Cold finished (soft)BKWThe final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding).
    Cold finished and stress-relievedBKSHeat 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.
    AnnealedGBKThe last cold forming process is followed by annealing in a controlled atmosphere.
    NormalizedNBKThe last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

    Condition on delivery:

    Steel GradeBKBKWGBKNBK
    Code No.

    Tensile

    Strength

    N/mm2 min

    Elongation at rupture N/mm2 min

    Tensile

    Strength

    N/mm2 min

    Elongation at rupture N/mm2 min

    Tensile

    Strength

    N/mm2 min

    Elongation at rupture N/mm2 min

    Tensile

    Strength

    N/mm2 min

    Elongation at rupture N/mm2 min
    St30 Si40083301228030290-42030
    St30 Al40083301228030290-42030
    St 3544063701031525340-47025
    St 455405470839021440-57021
    St 525904540749022490-63022

    Competitive Advantage:

    Yaxin Precision Tube Co., Ltd.

    Leading precision steel tube supplier in the global market, yield 70,000 tons per year based on both seamless tubing and welded tubing. 100% of tubing is used on automotive industry and hydraulic system.

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