Designation
| Name |
The value |
| Designation GOST Cyrillic |
23Х2НМФА |
| Designation GOST Latin |
23X2HMFA |
| Transliteration |
23H2NMFA |
| By chemical elements |
23Cr2НMoV |
Description
23KH2NMFA steel is used: for the manufacture of critical shtampovannyh structures; for heavy welded assemblies and structures, not subjected to the annealing or normalizing after welding due to large dimensions or design features, as well as welded and nesvorny parts operating at temperatures up to 500 °C.
Note
Complex alloyed steel with low carbon content. Steel 23KH2NMFA strengthen by heat treatment (quenching in oil with subsequent tempering or normalizing with tempering).
Standards
| Name |
Code |
Standards |
| Sheets and strips |
В33 |
GOST 11268-76, GOST 11269-76 |
| Sheets and strips |
В23 |
GOST 82-70 |
| Bars and shapes |
В32 |
TU 14-1-950-74 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| TU 14-1-950-74 |
0.19-0.26 |
≤0.025 |
≤0.025 |
0.3-0.6 |
1.9-2.4 |
0.17-0.37 |
0.8-1.2 |
Rest |
≤0.25 |
0.18-0.28 |
≤0.03 |
0.35-0.45 |
≤0.2 |
| GOST 11268-76 |
0.19-0.26 |
≤0.025 |
≤0.025 |
0.3-0.7 |
1.9-2.4 |
0.17-0.37 |
0.8-1.2 |
Rest |
≤0.25 |
0.18-0.28 |
≤0.03 |
0.35-0.45 |
≤0.2 |
Fe is the basis.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
d10 |
y, % |
KCU, kJ/m2 |
HB, MPa |
| Steel hot-rolled sheet (4-60 mm) 4-th and 5-th categories. Quenching in oil with 890±15 °C, leave at 590-620 °C, air cooling or oil |
|
- |
≥1130 |
≥9 |
- |
- |
≥390 |
- |
| Flats on the other 14-1-4118-2004 |
| ≤3.9 |
- |
490-785 |
≥17 |
≥15 |
- |
- |
- |
| Bars and strip hot rolled and forged. Quenching in oil with 875-905 °C + vacation at 590-620 °C, cooling in air or in oil |
| 25 |
932 |
1128 |
12 |
- |
50 |
540 |
341-415 |
Description mechanical marks
| Name |
Description |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
| d10 |
Elongation after rupture |
| y |
The relative narrowing |
| KCU |
Toughness |
| HB |
Brinell hardness number |
