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Standard

GOST 9941 82. Seamless Tubes of Corrosion Resistant Steel



GOST 9941Stainless Steel Pipe
Outside Diameter: 5 - 95 mm
(up to 25 mm - step 1 mm; next: 27; 28; 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)

Wall Thickness: 0,2 - 8,5 mm
(0,2; 0,3; 0,4; 0,5; 0,6; 0,8; 1; 1,2; 1,4; 1,5; 1,8; 2; 2,2; 2,5; 2,8; 3; 3,5; 4; 4,5; 5; 5,5; 6; 6,5; 7; 7,5; 8; 8,5)

Tolerances:
Outside Diameter:
D 5 - 10 mm: ord acc. ± 0,3 mm; inc. acc. ± 0,2 mm; high acc. ± 0,15 mm
D 11 - 30 mm: ord acc. ± 0,4 mm; inc. acc. ± 0,3 mm; high acc. ± 0,2 mm
D 32 - 95 mm: ord. acc. ± 1,2%; inc. acc. ± 1%; high acc. ± 0,8%.

Wall Thickness
S 0,2 mm: ord. acc. ± 0,05 mm; inc. acc. ± 0,03 mm
S 0,3 - 0,4 mm: ord. acc. ± 0,07 mm; inc. acc. ± 0,05 mm
S 0,5 - 1 mm: ord.acc. ± 0,15 mm; inc. acc. ± 0,1 mm
S 1,2 - 3 mm: ord.acc. + 12,5% - 15%; inc.acc. . ± 12,5%; high acc. + 12,5% - 10%
S 3,5 - 7 mm: ord.acc. ± 12,5%; inc.acc. + 12,5% - 10%; high acc. ± 10%
S 7,5 - 8,5 mm: ord.acc. + 12,5% - 10%; inc.acc. ± 10%.

Notes:
  1. Stainless Steel grades: 04Cr18Ni10, 08Cr20Ni14Si2, 10Cr17Ni13Mo2Ti, 08Cr18Ni12Ti,12Cr18Ni12T, 08Cr18Ni10, 12Cr18Ni9, 10Cr23Ni18, 12Cr18Ni10Ti, 08Cr18Ni10Ti.
  2. The stainles steel pipe from steel grades: 08XCr17Ti, 08Cr13,12Cr13,12Cr17, 15Cr25Ti, 08Cr18Ni12Nb, 08Cr17Ni15Mo3Ti, 17Cr18Ni9, 08Cr22Ni6Ti, 06CrNi28MoCuTi are produced subject to agreement.
  3. Random length from 0,75 to 12,5 m. Fixed length - up to 7 m, over 7 m - subject to agreement.
  4. Delivery of stainless steel tube with control of inner diameter and wall thickness, cold-hardened (without heat treatment), with test of mechanical properties at 350°C, on expanding, on flattening, on stability against intercrystal corrosion, with non-destructive test - is available subject to agreement.
Tube Sizes
OD, mm
WT, mm
OD, mm
WT, mm
OD, mm
WT, mm
5
0,2 - 1
25 - 28
0,3 - 4,5
60
0,5 - 8,5
6 - 7
0,2 - 1,5
30 - 35
0,3 - 5,5
63 - 75
1,5 - 8,5
8 - 9
0,2 - 2
36
0,4 - 5,5
76 - 85
3 - 8,5
10 - 13
0,2 - 2,5
38 - 45
0,4 - 6
89 - 90
4 - 8,5
14 - 17
0,2 - 3
48 - 50
0,4 - 7,5
95
4 - 5
18 - 19
0,2 - 3,5
51 - 56
0,5 - 7,5
 
 
20
0,2 - 4
57
0,5 - 8
 
 
21 - 24
0,3 - 4
 
 
 
 

Mechanical Properties
Steel Grade
Tensile Strength, N/mm2 (min)
Yield Strength, N/mm2 (min)
Elongation, % (min)
04Cr18Ni10
490
-
45
08Cr18Ni10Ti
549
-
37
08Cr18Ni12T
549
-
37
08Cr20Ni14Si2
510
-
35
10Cr17Ni13Mo2Ti
529
-
35
10Cr23Ni18
529
-
35
12Cr18Ni9
549
-
37
12Cr18Ni10Ti
549
-
35
12Cr18Ni12T
549
-
35

Chemical Composition (%, max)
Steel Grade
C
Si
Mn
Cr
Mo
S
P
Ti
V
04Cr18Ni10
0,04
0,8
2
17-19
9-11
-
0,02
0,03
-
-
0,08
0,8
2
17-19
9-11
-
0,02
0,035
5*C-0,7
-
08Cr18Ni12Ti
0,08
0,8
2
17-19
11-13
-
0,02
0,035
5*C-0,6
-
10Cr17Ni13Mo2Ti
0,10
0,8
2
16-18
12-14
2-3
0,02
0,035
-
5*C-0,7
10Cr23Ni18T
0,10
1
2
22-25
17-20
-
0,02
0,035
-
-
12Cr18Ni9T
0,12
0,8
2
17-19
8-10
-
0,02
0,035
-
-
12Cr18Ni10T
0,12
0,8
2
17-19
9-11
-
0,02
0,035
5*C-0,8
-
12Cr18Ni12T
0,12
0,8
1-2
17-19
11-13
-
0,02
0,03
0,5-0,7
-
08Cr17T
0,08
0,8
0,8
16-18
-
-
0,025
0,035
5*C-0,8
-
12Cr13
0,09-0,15
0,8
0,8
12-14
-
-
0,025
0,03
-
-
15Cr25T
0,15
1
0,8
21-37
-
-
0,025
0,035
5*C-0,9
-
08Cr18Ni12T
0,08
0,8
2
17-19
11-13
-
0,02
0,035
5*C-0,6
-
08Cr22Ni6T
0,08
0,8
0,8
21-23
5,3-6,3
-
0,025
0,035
5*C-0,65
-

GOST 9940 Seamless stainless steel tubes, hot finished
GOST 9941 Seamless stainless steel tubes, cold and hot finished
TU 14-3-460 Seamless Steel Pipes for Steam Boilers and Pipelines

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