Zhejiang Guanyu Stainless Steel Tube Co., Ltd  
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Standard

GOST 10704-91. Electrically Welded Steel Line-End Tubes




Outside Diameter: 12 - 108 mm
(12; 14; 16; 17; 17,5; 18; 19; 20; 21,3; 22; 24; 25; 26; 28; 30; 32; 33; 33,7; 36; 38; 40; 42; 45; 48; 51; 57; 60; 63,5; 76; 89; 102; 108)

Wall Thickness: 0,9 - 5 mm.
(0,9; 1; 1,2; 1,4; 1,5; 1,6; 1,8; 2; 2,2; 2,5; 2,8; 3; 3,2; 3,5; 3,8; 4; 4,5; 5)

Tolerances:
Outside Diameter:
D 12 - 30 mm: ± 0,3 mm
D 32 - 51 mm: ± 0,4 mm
D 57 - 108 mm: ± 0,8 mm
Wall Thickness:
S 0,9 - 5 mm: ± 10%

Notes:
  • Stainless Steel grades: 08,08kp,08ps,10,10kp ,10ps, 15, 15kp, 15ps, 20, 20kp, 20ps, St1ps, St1kp, St1sp, St2kp, St2ps, St2sp, St3kp, St3ps, St3sp.
  • Random length - 2 - 9 m, fixed length - 5 - 9 m.
  • Stainless Steel Pipe are delivered with raw end faces.
  • Quality control of welded seam is carried out by non-destructive method.
  • Surface conservation of stainless steel tube is available upon Customer special request.
  • Tube Sizes
    OD, mm
    WT, mm
    OD, mm
    WT, mm
    OD, mm
    WT, mm
    12 - 17,5
    0,9 - 1,6
    28 - 32
    1 - 2,8
    60 - 76
    2 - 4,5
    18 - 24
    0,9 - 2,0
    33 - 45
    1 - 3
    89 - 108
    3 - 5
    25
    0,9 - 2,5
    48 - 51
    1,4 - 3
     
     
    26
    1 - 2,5
    57
    1,8 - 4
     
     

    Mechanical Properties (heat-treated)
    Steel Grade
    Tensile Strength, N/mm2 (min)
    Yield Strength, N/mm2 (min)
    Elongation, % (min)
    08kp
    294
    174
    27
    08, 08ps, 10kp
    314
    196
    25
    10, 10ps, 15kp
    333
    206
    24
    St2sp, St2ps, St2kp
    333
    206
    24
    15, 15ps, 20kp
    372
    225
    22
    St3sp, St3ps, St3kp
    372
    225
    22
    20, 20ps
    412
    245
    21

    Chemical Composition (%, max)
    Steel Grade
    C
    Si
    Mn
    Cr
    Mo
    S
    P
    Cu
    N
    08
    0,05-0,12
    0,17-0,37
    0,35-0,65
    0,15
    0,30
    -
    0,04
    0,035
    0,3
    -
    08ps
    0,05-0,11
    0,05-0,17
    0,35-0,65
    0,10
    -
    0,04
    0,035
    -
    -
    0,006
    08kp
    0,05-0,12
    0,03
    0,25-0,50
    0,10
    -
    0,04
    0,035
    -
    -
    0,006
    10
    0,07-0,14
    0,17-0,37
    0,35-0,65
    0,15
    0,3
    -
    -
    -
    -
    -
    10ps
    0,07-0,14
    0,05-0,17
    0,35-0,65
    0,15
    0,3
    -
    0,04
    0,035
    0,3
    -
    10kp
    0,07-0,14
    0,07
    0,35-0,65
    0,15
    0,3
    -
    0,04
    0,035
    0,3
    -
    15
    0,12-0,19
    0,17-0,37
    0,35-0,65
    0,25
    -
    -
    0,04
    0,035
    -
    -
    15ps
    0,12-0,19
    0,05-0,17
    0,35-0,65
    0,25
    -
    -
    0,04
    0,035
    -
    0,006
    15kp
    0,12-0,19
    0,07
    0,25-0,50
    0,25
    -
    -
    0,04
    0,035
    -
    0,006
    20
    0,17-0,24
    0,17-0,37
    0,35-0,65
    0,25
    0,25
    -
    0,03
    0,025
    0,3
    -
    20kp
    0,17-0,24
    0,07
    0,25-0,50
    0,25
    -
    -
    0,04
    0,035
    -
    -
    20ps
    0,17-0,24
    0,05-0,17
    0,35-0,65
    0,25
    -
    -
    0,04
    0,035
    -
    -
    St3sp
    0,14-0,22
    0,15-0,30
    0,40-0,65
    0,30
    -
    -
    0,05
    0,04
    -
    0,01
    St3ps
    0,14-0,22
    0,05-0,15
    0,40-0,65
    0,30
    -
    -
    0,05
    0,04
    -
    0,01
    St3kp
    0,14-0,22
    0,05
    0,30-0,60
    0,30
    -
    -
    0,05
    0,04
    -
    0,01

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