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JIS G3445 STKM 15A Drawn Over Mandrel Steel Tube Seamless And Electric Resistance

Categories DOM Steel Tube
Brand Name: Torich
Model Number: JIS J3445
Certification: ISO9001 TS16949 EN10204.3.1
Place of Origin: China
MOQ: 3-5tons
Price: USD
Payment Terms: L/C, T/T
Supply Ability: 5000tons per year
Delivery Time: 4-6weeks depended on order size and quantity
Packaging Details: In bundles or carton boxes or wooden boxes
Material: STKM 15A
Japanese product name: つぎめがないこうかん
Application: Machine structural purposes
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    JIS G3445 STKM 15A Drawn Over Mandrel Steel Tube Seamless And Electric Resistance

    JIS G3445 STKM 15A Drawn Over Mandrel Steel Tube Seamless And Electric Resistance


    Product Name:Carbon steel tubes for machine structural purposes

    Appllication: Machine Auto competent Furniture Bicycle Mechanical parts Mechanical Elements machine elements


    1.Grade

    STKM 11A

    STKM 12 (ABC)

    STKM 13(ABC)

    STKM 14(ABC)

    STKM 15(AC) etc

    Standard JIS G3445


    2.OD:4-60mm,Wall thickness:0.5-7mm


    3.Characteristic:The tubes are high precision in tolerance


    4.Kindly advise heat treatment requirement if any.

    HR CW SR A N HF

    HR:hot rolled CW:cold worked SR:stress relieved A:annealed N:normalized HF: hot formed.


    5.STKM 15A Chemical composition % max:C:0.25-0.35 S:0.35 Mn:0.30-1.00 P:0.04 S:0.04

    Mechanical properties:min Tensile strength 470Mpa Yield Strength:275 Mpa Elongation:22%


    Tolerances on OD

    Division

    Tolerance on OD

    No.1

    under 50mm ±0.5mm
    50mm or over ±1%

    No.2

    under 50mm ±0.25mm
    50mm or over ±0.5%

    No.3

    under 25mm ±0.12mm
    25mm or over to and excel.40mm ±0.15mm
    40mm or over to and excel.50mm ±0.18mm
    50mm or over to and excel.60mm ±0.20mm
    60mm or over to and excel.70mm ±0.23mm
    70mm or over to and excel.80mm ±0.25mm
    80mm or over to and excel.90mm ±0.30mm
    90mm or over to and excel.100mm ±0.40mm
    100mm or over ±0.50%


    Note:1. For hot finished seamless steel tube, the outside diameter tolerance No.1 shall be applied.
    2.The tolerance on outside diameter of quenched and tempered tubes shall be as agreed upon by the purchaser and manufacturer.


    Tolerances on WT

    Division

    Tolerance on WT

    No.1

    under 4mm +0.6mm -0.5mm
    4mm or over +15%-12.5%

    No.2

    under 3mm ±0.3mm
    3mm or over ±10%

    No.3

    under 2mm ±0.15mm
    2mm or over ±8%

    Note: For the finished seamless steel tubes the tolerances No.1 shall be applied.


    The tolerances on the tube length shall be in the range of 0 to+50mm.However,when tolerances outside this range are especially required,agreement shall be made between the purchaser and manufacturer.


    (DOM)Drawn Over Mandrel :

    The first stages of manufacturing : ERW ,but in the finishing stages : Entire flash weld is removed and the tube is clod drawn over a mandrel.which provides the tube with a better dimensional tolerances,good surface finish and the strongest weld strength achievable.



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