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Seamless Steel Tubes Cold-Formed building material thick wall thickness

Categories Structural Steel Tubes & Pipes
Place of Origin: China
Brand Name: Torich
Certification: ISO9001, ISO14001, TS16949
Model Number: GOST8734-75
Price: NEGOTIATION
Packaging Details: IN BUNDLES
Delivery Time: 45-60 DAYS
Payment Terms: T/T L/C
Supply Ability: 60000 TONS PER YEAR
Min Order: 5 tons
Shape: Round
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Seamless Steel Tubes Cold-Formed building material thick wall thickness

Gost 8734-75 Seamless steel tubes Cold-Formed


Outside Diameter: 5 – 140 mm
(5; 6; 7; 8; 9; 10; 11; 12; 13; 14; 15; 16; 17; 18; 19; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 32; 34; 35; 36; 38; 40; 42; 45; 48; 50; 51; 53; 54; 56; 57; 60; 63; 65; 68; 70; 73; 75; 76; 80; 83; 85; 89; 90; 95; 100; 102; 108; 110; 120; 130; 140)

Wall Thickness: 0,4 – 12 mm
(0,4; 0,5; 0,6; 0,8; 1; 1,2; 1,4; 1,5; 1,6; 1,8; 2; 2,2; 2,5; 2,8; 3; 3,2; 3,5; 4; 4,5; 5; 5,5; 6; 6,5; 7; 7,5; 8; 8,5; 9; 9,5; 10; 11; 12)

Tolerances:
OD:
D 5 – 10 mm: ± 0,15 mm
D 11 – 30 mm: ± 0,30 mm
D 32 – 50 mm: ± 0,40 mm
D 51 – 140 mm: ± 0,8%

WT:
S 0,4 – 1 mm: ± 0,12 mm
S 1,2 – 5 mm: ± 10%
S 5,5 – 12 mm: ± 8%

Notes:

  1. Steel grades: 10, 20, 35, 45, 10Mn2, 15Cr, 20Cr, 40Cr, 30CrMnSi, 15CrMo acc. to GOST 1050-88, GOST 19281-89, GOST 4543-71. Others steel grades are available subject to agreement.
  2. Dimensions and tolerances acc. to GOST 8734-75.
  3. Technical requirements acc. to GOST 8733-74.
  4. Length from 1.5 to 11.5 m depending on diameter and wall thickness.
Sizes
OD, mm
WT, mm
OD, mm
WT, mm
OD, mm
WT, mm
5
0,5 – 1,5
16 – 20
0,4 – 5
45 – 48
1 – 10
6
0,5 – 2
21 – 22
0,4 – 6
50 – 56
1 – 12
7 – 8
0,5 – 2,5
23 – 24
0,5 – 4
57 – 70
1,5 – 12
9
0,4 – 3
25 – 28
1 – 7
73 – 95
2 – 12
10 – 12
0,4 – 3,5
30 – 36
1 – 8
100 – 130
2,5 – 12
13 – 15
0,4 – 4
38 – 42
1 – 9
140
3 – 12

Mechanical properties
Steel Grade
Tensile Strength, N/mm2(min)
Yield Strength,N/mm2 (min)
Elongation, % (min)
10
343
206
24
20
412
245
21
35
510
294
17
45
589
323
14
10Mn2
422
245
22
15Cr
412
-
19
20Cr
431
-
17
40Cr
618
-
14
30CrMnSi
491
-
18
15CrMo
431
226
21

Chemical Composition (%, max)
Steel Grade
C
Si
Mn
Cr
Ni
Mo
S
P
Cu
N
10
0,07-0,14
0,17-0,37
0,35-0,65
0,15
0,3
-
-
-
-
-
20
0,17-0,24
0,17-0,37
0,35-0,65
0,25
0,25
-
0,03
0,025
0,30
0,008
35
0,32-0,40
0,17-0,37
0,50-0,80
0,25
0,30
-
0,04
0,035
0,30
-
45
0,42-0,45
0,17-0,37
0,50-0,80
0,25
-
-
-
-
-
-
10Mn2
0,07-0,15
0,17-0,37
1,2-1,6
0,30
0,30
-
0,035
0,035
0,30
-
20Cr
0,17-0,23
0,17-0,37
0,50-0,80
0,70-1,0
0,30
-
0,035
0,035
0,30
-
40Cr
0,36-0,44
0,17-0,37
0,50-0,80
0,80-1,10
0,30
-
0,035
0,035
0,30
-
30CrMnSi
0,28-0,34
0,90-1,20
0,80-1,10
0,80-1,10
0,30
-
0,005
0,025
-
-
15CrMo
0,11-0,18
0,17-0,37
0,40-0,70
0,80-1,10
0,30
0,40-0,55
0,025
0,025
0,30
-


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GOST-8734-75 Seamless Steel Tubes Manufacturer China



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