Designation
| Name |
The value |
| Designation GOST Cyrillic |
12Х3ГНМФБА |
| Designation GOST Latin |
12X3GHMFBA |
| Transliteration |
12H3GNMFBA |
| By chemical elements |
12Cr3MnНMoVNb |
Description
12Х3ГНМФБА steel is used: for the production of seamless hot-deformed pipes used for the fabrication of parts by machining; pressure vessel.
Standards
| Name |
Code |
Standards |
| Steel pipes and fittings to them |
В62 |
TU 1308-005-33116077-2001 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Mo |
Nb |
Ca |
| TU 1308-005-33116077-2001 |
0.12-0.16 |
≤0.005 |
≤0.015 |
0.9-1.2 |
2.9-3.2 |
0.2-0.37 |
0.9-1.2 |
Rest |
≤0.3 |
0.05-0.1 |
0.25-0.35 |
0.02-0.05 |
0.005-0.03 |
Fe is the basis.
According to TU 1308-005-33116077-2001, calcium is introduced into the steel by calculation. Permissible deviations in chemical composition (in% of mass): carbon + 0.02 / -0.01, manganese ± 0.15, silicon ± 0.05, chromium ± 0.25, copper ± 0.05, nickel ± 0, 10, molybdenum ± 0.02, vanadium ± 0.02, niobium ± 0.01, phosphorus + 0.002, sulfur + 0.005.
Mechanical properties
| Section, mm |
σU, MPa |
d5, % |
KCU, kJ/m2 |
HB, MPa |
| The mechanical properties of the steel, defined on T/o samples cut from the pipes on the other 1308-005-33116077-2001. Normalization at 900-920 °With (extract 10 min), air cooling + Vacation at 500-550 °C (exposure 2 hours), air cooling |
|
980-1180 |
≥14 |
≥590 |
≥270 |
| Pipe the seamless hot-deformed heat-treated in the delivery condition on the other 1308-005-33116077-2001. Normalization at 950-980 °C (delay 2-3 hours), air cooling + Vacation at 720-750 °C (exposure 5-6 h), air cooling |
| - |
- |
- |
- |
≤217 |
Description mechanical marks
| Name |
Description |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
| KCU |
Toughness |
| HB |
Brinell hardness number |
Physical characteristics
| Temperature |
r, kg/m3 |
| 20 |
7850 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
