GOST 800-78. Bearing Tubes
Outside Diameter: Hot-formed 70 - 160 mm,
Cold-formed 20 - 83 mm
Wall Thickness: Hot-formed 7 - 26,6 mm,
Cold-formed 3 - 15 mm
Notes:
- Hot-formed pipes are produced from stainless steel grades SchCh15, SchCh15SG and their modifications, with contour turning of the external surface.
- Cold-formed pipes are produced from stainless steel grades SchCh15, SchCh15SG and their modifications, without contour turning.
- OD and WT are subject to agreement.
- The depth of decarbonized layer shall be determined by the Customer.
| Mechanical properties |
Steel Grade |
|
|
Diametr of Dent, mm |
SchCh15, SchCh15SG |
Hot-formed |
207 - 187 |
4,4 - 4,1 |
|
255 - 207 |
4,2 - 3,8 |
|
max 320 |
min 3,4 |
| Tubes Sizes |
|
OD/WT |
OD/WT Tolerances, % |
OD Tolerances., mm |
Length, m |
Outside Diameter |
Wall Thickness |
Hot-formed |
70 - 160 |
7 - 26,6 |
< 11 |
+ 15 |
+ 0,2 |
2 - 5 |
11 .. 12,5. |
+ 20 |
> 12.5 |
+ 25 |
Cold-formed |
20 - 83 |
3 - 15 |
- |
- |
+ 0,4
(D 14 - 60 mm)
+ 0,5
(D 60 - 90) |
2,5 - 4,5 |
| Chemical Composition (%, max) |
Steel Grade |
C |
Si |
Mn |
Cr |
Ni |
S |
P |
Cu |
SchCh15 |
0,95-1,05 |
0,17-0,37 |
0,2-0,4 |
1,3-1,65 |
0,3 |
0,02 |
0,027 |
0,25 |
SchCh15SG |
0,95-1,05 |
0,40-0,65 |
0,9-1,2 |
1,3-1,65 |
0,30 |
0,02 |
0,027 |
0,25 |
|
|
