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  • GB/T 3624 Titanium And Titanium Alloy Tube
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  • GB/T 3624 - Titanium and titanium alloy seamless tubes

    GB/T 3624  is applicable to titanium and titanium alloy seamless pipes produced by cold rolling (cold drawing) method, and titanium alloy seamless pipes are widely used in heat exchange equipment such as tubular heat exchangers, coil heat exchangers, serpentine heat exchangers, condensers, evaporators and pipelines.


    Main Grade
    TA1, TA2, TA3, TA8, TA8-1 , TA9, TA9-1, TA10







    GB/T 3624 - Titanium and titanium alloy seamless tubes Quick Details
    Type:seamless steel tube
    Grade:TA1, TA2, TA3, TA8, TA8-1 , TA9, TA9-1, TA10
    Outside Diameter :3.0mm—110mm
    Wall thickness:0.2mm—4.5mm
    Length:6000mm、12000m or specified length as required.
    Type of End-Finish:Plain End、Beveled End、Treaded
    Surface treatment: Tubes will be varnished (Outside only) to prevent rust.
     
    Additional Info
    Payment Terms:T / T, LC
    Port of Shipment:Tianjin,China
    Package:According To Per Customers' Require
    Marking:Standard + Steel Grade + Size + Heat No + Lot No
    Delivery time:Tubes will be completed within 30 days, and urgent delivery time can be discussed.

     

    GB/T 3624 - Titanium Tube grade, status and specifications


    Table 1 Pipe grades, status and specifications
     
    Grade Supply Status Manufacturing method OD, mm WT, mm
    0.2 0.3 0.5 0.6 0.8 1.0 1.25 1.5 2.0 2.5 3.0 3.5 4.0 4.5
    TA1
    TA2
    TA8
    TA8-1
    TA9
    TA9-1
    TA10
    Annealed state
    (M)
    Cold rolled (cold drawed) 3-5 - - - - - - - - - -
    >5-10 - - - - - - - -
    >10-15 - - - - - - -
    >15-20 - - - - - - -
    >20-30 - - - - - -
    >30-40 - - - - - - -
    >40-50 - - - - - - - -
    >50-60 - - - - - - - -
    >60-80 - - - - - - -
    >80-110 - - - - - - - - -
    welded 16 - - - - - - - - - -
    19 - - - - - - - - -
    25、27 - - - - - - - -
    31、32、33 - - - - - - - - -
    38 - - - - - - - - - - -
    50 - - - - - - - - - - - -
    63 - - - - - - - - - - - -
    Welded rolled 6-10 - - - - - - - - -
    >10-15 - - - - - - - -
    >15-20 - - - - - - -
    >20-30 - - - - - - -
    Note: ”o ” indicates the specifications that can be produced according to this standard.
     
     
    Table 2 TA3 pipe status and specifications
     
    Grade Supply Status Manufacturing method OD,mm WT, mm
    0.5 0.6 0.8 1.0 1.25 1.5 2.0 2.5 3.0 3.5 4.0 4.5
    TA3 Annealed state
    (M)
    Cold rolled (cold drawed) >10-15 - - - - -
    >15-20 - - - - -
    >20-30 - - - -
    >30-40 - - - - -
    >40-50 - - - - - -
    >50-60 - - - - - -
    >60-80 - - - - -
    Note: ”o ” indicates the specifications that can be produced according to this standard.
     
     
     
     
     
    Chemical composition


    Table 3 Chemical composition

    Grade Nominal chemical composition Chemical composition
    Main composition Impurity, ≤
    Ti Al Sn Mo Pd Ni Si B Fe C N H O Other
     Single  Sum
     TA1 Industrial pure titanium   - - - - - - - 0.10 0.03 0.012 0.008 0.10 0.05 0.20
     TA2 Industrial pure titanium   - - - - - - - 0.30 0.08 0.03 0.015 0.25 0.10 0.40
     TA3 Industrial pure titanium   - - - - - - - 0.30 0.08 0.05 0.015 0.35 0.10 0.40
     TA8  Ti-0.05Pd   - - - 0.04-0.08 - - - 0.30 0.08 0.03 0.015 0.25 0.10 0.40
     TA8-1  Ti-0.05Pd   - - - 0.04-0.08 - - - 0.20 0.08 0.03 0.015 0.18 0.10 0.40
     TA9  Ti-0.2Pd   - - - 0.12-0.25 - - - 0.30 0.08 0.03 0.015 0.25 0.10 0.40
     TA9-1  Ti-0.2Pd   - - - 0.12-0.25 - - - 0.20 0.08 0.03 0.015 0.18 0.10 0.40
     TA10  Ti-0.3Mo-0.8Ni   - - 0.2-0.4 - 0.6-0.9 - - 0.30 0.08 0.03 0.015 0.25 0.10 0.40
     



    Mechanical properties
     

    Table 4 Temperature Mechanical Properties
     
    Grade Delivery status Tensile strength Yield strength,Mpa Elongation %
    TA1 Annealing ≥240 140-310 ≥24
    TA2 ≥400 275-450 ≥20
    TA3 ≥500 380-550 ≥18
    TA8 ≥400 275-450 ≥20
    TA8-1 ≥240 140-310 ≥24
    TA9 ≥400 275-450 ≥20
    TA9-1 ≥240 140-310 ≥24
    TA10 ≥460 ≥300 ≥18
     
     


     

    Size and size Tolerance


    (1) Table 5 OD and allowable deviation, mm
     
    OD Tolerance OD Tolerance
    3—10 ±0.15 >50—80 ±0.65
    >10—30 ±0.30 >80-100 ±0.75
    >30—50 ±0.50 >100 ±0.85
     
     
    (2)The Tolerance of the wall thickness of the pipe shall not exceed ± 12.5% of its nominal wall thickness.

    (3)The length of the pipe should meet the requirements of Table 6.

    Table 6 Pipe length ,mm
     
    Specification Seamless Pipe  
    OD≤15 OD>15 
    Length   Wall thickness ≤2.0 Wall thickness >2.0-5.5
    500-4000 500-9000 500-6000
     
     

    (4)The length or length of the pipe should be within the length of its indefinite length. When the length is <6 000 mm, the allowable deviation is (+6mm, 0 mm), and when the length is ≥6 000 mm, the allowable deviation is (+10mm, 0 mm)mm. The length of the double ruler should also be included in the amount of cut in the pipe, each cut is 5 mm.
     
     
    (5) Both ends of the pipe should be cut flat, there should be no burrs, and the Bevel end should meet the requirements of Table 7.
     

    Table 7 Size of Bevel end ,mm
     
    Outer diameter Size of Bevel end,≤
    ≤30 2
    >30—60 3
    >60—110 4
     
     
     
    (7)The bending of the pipe shall comply with the requirements of Table 8.
     
    Table 8 Bending
     
    Outer diameter,mm Bending (mm/m),
    ≤30 ≤3
    >30—110 ≤4
     
     

     
     
    Appearance quality
    (1) The inner and outer surfaces of the pipe should be clean and free from visible defects such as cracks, folds, peeling and pinholes.
    (2) Local defects on the surface of the pipe allow clearance, but the outer diameter and wall thickness must not exceed the allowable deviation after removal.
    (3) The surface of the pipe is allowed to have scratches, pits, bumps and straightening marks that do not exceed the allowable deviation of the outer diameter and wall thickness. Allow the tube to have a different color after pickling.
     
     

    Testings
    Chemical  analysis
    Tensile test 
    Flattening test 
    Hydraulic pressure test
    Bending test 
    Size measurement 
    Appearance quality inspection
     





     
    Marking, packaging, transportation and storage
    Marking
    The following contents shall be marked on the pipes and boxes that have passed the inspection:
    a) product brand number;
    b) product name;
    c) supply status;
    d) the batch number;
    e) This standard number.
     
     
    Tag example
    Product marks are expressed in the order of product name, grade, status, specification, and standard number. Examples of tags are as follows:
    The TA2 seamless pipe produced according to this standard is annealed, with an outer diameter of 30 mm and a wall thickness of 1. 5mm, length 3 500mm, marked as:
    Tube TA2 M≠30× 1. 5× 3 500 GB/T 3624-2010
     


     
     
    Quality certificate
    Each batch of tubing shall be accompanied by a quality certificate stating:
    a) the name of the supplier;
    b) product name;
    c) product designation, specifications and status;
    d) smelting furnace number, batch number, batch weight and count;
    e) the results of the various analytical tests and the quality inspection department's mark;
    f) the standard number;
    g) Date of packaging.
     
     
     


     
    Application
    The titanium tube is light in weight, high in strength and superior in mechanical properties. It is widely used in heat exchange equipment such as tubular heat exchangers, coil heat exchangers, serpentine heat exchangers, condensers, evaporators and pipelines. Many nuclear power industries use titanium tubes as their standard units.
     
     

     
     
    Characteristics of titanium tube
    (1)The titanium tube has plasticity. The high-purity titanium tube has an elongation of 50 to 60% and a reduction in area of ​​70 to 80%. Despite the low strength of high-purity titanium tubes, pure industrial titanium contains a small amount of impurities and the addition of alloying elements can significantly enhance its mechanical properties, making its strength comparable to high strength. This means that industrial pure titanium tubes, as long as they contain a small amount of interstitial impurities and other metal impurities, can have both high strength and proper plasticity.
    (2)The specific strength (strength and weight ratio) of industrial pure titanium tubes is very high in metal structural materials. Its strength is comparable to steel, but its weight is only 57% of steel.
    (3)Titanium tube has high heat resistance and can maintain good strength and stability in the atmosphere of 500 °C.
    (4)Titanium tube also has good low temperature resistance, even under the ultra-low temperature of -250 °C, it still has high impact strength, and can withstand high pressure and vibration.
    (5)Strong corrosion resistance, because it has a very high affinity for oxygen, and can form a dense oxide film on the surface to protect the titanium from the medium. Therefore, titanium has excellent stability in acidic, basic, neutral salt aqueous solutions and oxidizing media, and is superior in corrosion resistance to existing stainless steels and other non-ferrous metals.


     
     


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