GOST 8732-78. Seamless Hot-Formed Steel Pipes
Outside Diameter: 32 - 219 mm
(32; 33,7; 38; 42; 42,4; 45; 48,3; 50; 51; 54; 57; 60; 60.3*; 63,5; 68; 70; 73; 76; 82,5*; 83; 89; 95; 102; 108; 114; 121; 127; 133; 140; 146; 152; 159; 168; 178*; 180; 194; 203; 219)
Wall Thickness: 2.8 - 46 mm
(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; 13; 14; 15; 16; 17; 18; 19; 20; 22; 24; 25; 26; 28; 30; 32; 34; 35; 36; 38; 40; 42; 45) .
Tolerances:
OD:
D 32 - 50 mm: ± 0.5 mm
D 51 - 219 mm: ± 1%
WT:
S 2,8 - 15 mm: + 12,5% - 15%
S 16 - 30 mm: ± 12,5%
S 32 - 45 mm: + 10% - 12,5%
Notes:
- Steel grades: 10, 20, 35, 45, 10Mn2, 15Cr, 20Cr, 40Cr, 30CrMnSi, 15CrMo, 30CrM acc. to GOST 1050-88, GOST 4543-71, GOST 19281-89.
- Dimension marked by "*", as well as intermediate dimensions are produced subject to agreement.
- Dimensions of pipes and tolerances according to GOST 8732-78.
- Technical requirements according to GOST 8731-74.
- Length from 4 up to 11.7 m depending on diameter and wall thickness.
- Groups of metrics of quality:
BВ - with rate setting of chemical composition for killed steel (grades according to GOST 1050-88, GOST 4543-71, GOST 19281-89);
V - with rate setting of mechanical properties and chemical composition;
G - with rate setting of chemical composition and control of mechanical properties for heat-treated samples. Mechanical properties are according to steel standards.
|
| Sizes |
OD, mm |
WT, mm |
OD, mm |
WT, mm |
OD, mm |
WT, mm |
32 - 33,7 |
2,8 - 4,0 |
89 - 95 |
3,5 - 24 |
146 |
5 - 38 |
38 - 42,4 |
3 - 4,5 |
102 - 108 |
4 - 28 |
152 |
5 - 40 |
45 - 54 |
3,5 - 6,0 |
114 |
4,5 - 28 |
159 |
5 - 42 |
57 - 68 |
3,5 - 14 |
121 |
5 - 30 |
168 - 194 |
6 - 45 |
70 |
3,5 - 16 |
127 |
5 - 32 |
203 - 219 |
8 - 45 |
73 - 76 |
3,5 - 20 |
133 |
5 - 35 |
|
|
82,5 - 83 |
3,5 - 22 |
140 |
5 - 36 |
|
|
| Mechanical properties |
Steel Grade |
Tensile Strength, N/mm2 (min) |
Yield Strength, N/mm2 (min) |
Elongation, % (min) |
10 |
353 |
216 |
24 |
20 |
412 |
245 |
21 |
35 |
510 |
294 |
17 |
45 |
588 |
323 |
14 |
10Mn2 |
421 |
265 |
21 |
20Cr |
431 |
- |
16 |
40Cr |
657 |
- |
9 |
30CrMnSi |
686 |
- |
11 |
15CrMo |
431 |
225 |
21 |
30CrMn |
588 |
392 |
13 |
| Chemical composition (%, max) |
Steel Grade |
C |
Si |
Mn |
Cr |
|
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 |
- |
30CrMn |
0,26-0,33 |
0,17-0,37 |
0,40-0,70 |
0,80-1,10 |
0,30 |
0,15-0,25 |
0,025 |
0,025 |
0,30 |
- |
|
