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  • North Steel (Sydney) Group Co., Ltd
    • +61 478727799info@north-steel.com
  • Room 604, No. 2, Beichen Building, Beichen District, Tianjin, China.
    • +61 478727799  +61 434518549
    Head Office: Room 604, No. 2, Beichen Building, Beichen District, Tianjin, China.
    Australian Office: 72/208 Parramatta Rd, Homebush, NSW 2140, Australia.
    • St52-E355-St52-3-Cold-Drawn-Seamless-Carbon-Steel-Tube-Ready-to-Hone-for-Hydraulic-Cylinder-Barrelchanical Steel Tubing
    • 37MN SEAMLESS STEEL TUBE FOR GAS CYLINDER PIPE
    • HIGH PRECISION COLD ROLLED SEAMLESS TUBE USED FOR AUTOMOTIVE
    • DIN 2391 SEAMLESS STEEL TUBE USED FOR MECHANICAL AND AUTOMOBILE
    • GEOLOGICAL DRILLING TUBE
    St52-E355-St52-3-Cold-Drawn-Seamless-Carbon-Steel-Tube-Ready-to-Hone-for-Hydraulic-Cylinder-Barrel
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    St52-E355-St52-3-Cold-Drawn-Seamless-Carbon-Steel-Tube-Ready-to-Hone-for-Hydraulic-Cylinder-Barrel

    GEOLOGICAL DRILLING TUBE

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    Geological Drilling Tube  

    Size Range: O.D 30-139.7 mm, WT 3-19mm

    Executive Standard:

    GB/T9808 Seamless Steel Tubes for Drilling GB/T 16950, Geological core drilling tools DIN2391, Seamless precision steel tubes EN10305-1, Steel tubes for precision applications Part 1: Seamless cold drawn tubes ASTM A519, Seamless Carbon and Alloy Steel Mechanical Tubing DCDMA, Diamond Core Drilling Manufacturers Association BS4019, Specification for rotary core drilling equipment JIS G3465, Seamless Steel Tubes for Drilling According to customer’s specific requirements
     

    Steel Grade: 45MnMoB, 30CrMnSiA, 30CrMo, 42CrMo, 40Mn2 ； 34CrMo4, 42CrMo4 ； 4130, 4135, 4140, 1541 and etc.

     

    Delivery Condition:

    Cold drawn and stress relieved (+SR) (BKS) Normalized (+N) (NBK) Quenched and Tempered (QT)  

    Advantages:

    Excellent microstructure High straightness Low residual hoop stresses Tight tolerances, low eccentricity

    Dimensional Range:

    SIZE

    		 Wireline Drill Rod SIZE Casing

    Outer Diameter

    (mm)

    		 Inner Diameter (mm) Outer Diameter (mm)

    Inner Diameter

    (mm)

    Nom.

    		 Nom. Nom. Nom.
    A 44.45 35.05 AW 57.1

    48.4

    B

    		 55.55 46.05 BW 73.0 60.3
    N 69.85 60.45 NW 88.9

    76.2

    H

    		 88.90 77.80 HW 114.3 101.6
    P 114.30 101.60 PW 139.7

    127.0
    S 139.70 125.50    
     

    SIZE

    Outer Tube

    		 Inner Tube

    Outer Diameter

    (mm)

    		 Inner Diameter (mm) Outer Diamete (mm)

    Inner Diameter

    (mm)
    Nom. Nom. Nom.

    Nom.

    A

    		 46.05 36.50 32.54 28.58

    B

    		 57.15 46.05 42.85

    38.10
    N 73.03 60.33 55.58

    49.99

    H

    		 92.08 77.80 73.03 66.80
    P 117.48 101.60 95.25

    88.90
    S 142.88 125.50 117.00

    111.00
      Chemical Composition:

    Steel Grade

    		 C Si Mn P S Cr Mo B

    45MnMoB

    		 0.43-0.48 0.17-0.37 1.05-1.35 ≤0.020 ≤0.015   0.20-0.25 0.001-0.005
    4130 0.28-0.33 0.15-0.35 0.40-0.60 ≤0.040 ≤0.040 0.80-1.10

    0.15-0.25

    		  

    1541

    		 0.36-0.44 – 1.35-1.65 ≤0.040 ≤0.050      

    30CrMnSiA

    		 0.28-0.34 0.90-1.20 0.80-1.10 ≤0.020 ≤0.015 0.80-1.10

    		 

    4140

    		 0.38-0.43 0.15-0.35 0.75-1.00 ≤0.040 ≤0.040 0.80-1.10

    0.15-0.25
      Mechanical Properties:

    Steel Grade

    		 Deliver Condition Min Tensile Strength (Mpa)  Min Yield Strength (Mpa) Min Elongation (%) Hardness (HRC)

    45MnMoB

    		 Normalizing（+N） 790 600 14%

    –

    4130

    		 Stress relieving（+SR） 813 690 15%  ≥24
    1541 Stress relieving（+SR） 813 690 15%

     ≥24

    30CrMnSiA

    		 Quenched and tempered（QT） 850 750 14%

    26 – 31
    4140 Quenched and tempered （QT） 950 850 14%

    28 – 33
       

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  • North Steel (Sydney) Group Co., Ltd
    • +61 478727799info@north-steel.com
  • Room 604, No. 2, Beichen Building, Beichen District, Tianjin, China.
    • +61 478727799  +61 434518549

    Head Office

    Room 604, No. 2 Beichen Building, Beichen District, Tianjin, China.

    Australian Office

    72/208 Parramatta Rd, Homebush, NSW 2140, Australia.

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