Designation
| Name |
The value |
| Designation GOST Cyrillic |
30ХРА |
| Designation GOST Latin |
30XPA |
| Transliteration |
30HRA |
| By chemical elements |
30CrB |
Description
30KHRA steel is used: for the manufacture of axles, shafts, levers, bolts, nuts and other small parts as well as gears, shafts and loaded pins of load-bearing structures.
Note
Structural steel high quality chrome.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В32 |
GOST 4543-71, GOST 14955-77, GOST В 5160-89, TU 14-1-2118-77, TU 14-11-245-88, TU 14-1-1271-75, 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 |
| Steel pipes and fittings to them |
В62 |
TU 14-3-798-79 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
B |
Ti |
Mo |
| GOST 4543-71 |
0.27-0.33 |
≤0.025 |
≤0.025 |
0.5-0.8 |
1-1.3 |
0.17-0.37 |
≤0.3 |
Rest |
≤0.3 |
≤0.001 |
≤0.03 |
≤0.15 |
Fe is the basis.
GOST 4543-71 regulates the content of high-quality steel: P≤0,025%; S≤0.015%; Сu≤0.25%.
Mechanical properties
| sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
| Quenching in oil from 900 °C + vacation at 200 °C, air cooling |
| 1300 |
1600 |
9 |
40 |
500 |
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 |
