Designation
| Name |
The value |
| Designation GOST Cyrillic |
30Х2НВФА |
| Designation GOST Latin |
30X2HBFA |
| Transliteration |
30H2NVFA |
| By chemical elements |
30Cr2НWV |
Description
30Х2НВФА steel is used: for the manufacture of critical parts of high strength and toughness, working in conditions of alternating loads (crankshafts, gears, connecting rods, etc.); for the manufacture of parts with large cross sections requiring high hardenability; parts aircraft industry in the nitride state.
Note
Alloy structural steel vysokokachestvennoj.
Often steel parts 30Х2НВФА applied nitriding.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and General rules |
В20 |
OST 1 90005-91 |
| Blanks. Of the workpiece. Slabs |
В31 |
TU 1-92-156-90 |
| 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 |
0.27-0.34 |
≤0.025 |
≤0.025 |
0.3-0.6 |
1.6-2 |
0.17-0.37 |
1.4-1.8 |
Rest |
≤0.25 |
0.18-0.28 |
≤0.03 |
≤0.15 |
1.2-1.6 |
Fe is the basis.
Mechanical properties
| Section, mm |
t отпуска, °C |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
HB, MPa |
HRC |
| Bars and strip hot rolled and forged. Quenching in oil with 890-910 °C + vacation, air cooling or oil |
|
610-660 |
≥835 |
≥1030 |
≥12 |
≥55 |
≥981 |
285-341 |
- |
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 |
| - |
- |
- |
- |
- |
- |
- |
285-341 |
27-36 |
| Bars and strip hot rolled and forged. Quenching in oil with 890-910 °C + vacation, air cooling or oil |
|
560-625 |
≥980 |
≥1180 |
≥10 |
≥45 |
≥687 |
341-388 |
- |
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 |
| - |
- |
- |
- |
- |
- |
- |
331-376 |
36-40 |
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 |
| y |
The relative narrowing |
| KCU |
Toughness |
| HB |
Brinell hardness number |
| HRC |
Rockwell hardness (indenter diamond spheroconical) |
