Designation
| Name |
The value |
| Designation GOST Cyrillic |
30Х3МФ |
| Designation GOST Latin |
30X3MF |
| Transliteration |
30H3MF |
| By chemical elements |
30Cr3MoV |
Description
30KH3MF steel is used: for the manufacture of parts for marine diesel engines and other parts that must have wear resistance at high pressures, the steel is subjected to nitriding.
Note
Structural steel high-quality chrome-molybdenum-vanadium. Steel heat resistant up to 450 °C.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В32 |
GOST 4543-71, GOST 14955-77, TU 14-1-2118-77, TU 14-11-245-88, TU 14-136-367-2008 |
| Bars and shapes |
В22 |
GOST 8319.0-75 |
| Blanks. Of the workpiece. Slabs |
В31 |
OST 3-1686-90, TU 14-1-4944-90 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| GOST 4543-71 |
0.27-0.34 |
≤0.035 |
≤0.035 |
0.3-0.6 |
2.3-2.7 |
0.17-0.37 |
≤0.3 |
Rest |
≤0.3 |
0.06-0.12 |
≤0.03 |
0.2-0.3 |
≤0.2 |
Fe is the basis.
According to GOST 4543-71 the content in high-quality steel is regulated: P≤0,025%; S≤0.025%; Сu≤0.30%; in high-grade steel: P≤0,025%; S≤0.015%; Сu≤0.25%.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
| Quenching in oil from 870 °C to + vacation at 620 °C, cooling in water |
| ≤25 |
835 |
980 |
12 |
55 |
980 |
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 |
Technological properties
| Name |
The value |
| Склонность к отпускной хрупкости |
inclined |
| Flock-sensitive sensitivity |
sensitive |
