Designation
| Name |
The value |
| Designation GOST Cyrillic |
30ХГ2СТЛ |
| Designation GOST Latin |
30XG2CTL |
| Transliteration |
30HG2STL |
| By chemical elements |
30CrMn2СTi |
Description
30KHG2STL steel is used: for the manufacture of castings of shoes caterpillar machines, angle bulldozer blades, cremallera gear excavators, rollers dredge chains, the working bodies of mining machines, levers, gears.
Standards
| Name |
Code |
Standards |
| Castings with special properties (iron and steel) |
В83 |
GOST 21357-87 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
Ti |
| GOST 21357-87 |
0.25-0.35 |
≤0.02 |
≤0.02 |
1.5-1.8 |
0.6-1 |
0.4-0.8 |
≤0.3 |
Rest |
≤0.3 |
0.01-0.04 |
Fe is the basis.
According to GOST 21357-87, the mass fraction of rare-earth metals (REM-yttrium, cerium, etc.) in steel should be in the range of 0.02-0.05%.
Mechanical properties
| sT|s0,2, MPa |
σU, MPa |
d |
y, % |
KCU, kJ/m2 |
HB, MPa |
| Casting. Quenching in water from 870-890 °C + vacation at 200-220 °C, air cooling (KCU-60). Steel is used as wear-resistant |
| ≥1300 |
≥1600 |
≥4 |
≥15 |
≥3 |
≥400 |
| Casting. Quenching in water from 870-890 °C + vacation at 640-660 °C, air cooling (KCU-60) |
| ≥650 |
≥750 |
≥15 |
≥40 |
≥3.5 |
- |
| Casting. Normalization at 890-910 °C + vacation at 640-660 °C, air cooling (KCU-60) |
| ≥600 |
≥700 |
≥12 |
≥40 |
≥3.5 |
- |
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 |
| d |
Elongation after rupture |
| y |
The relative narrowing |
| KCU |
Toughness |
| HB |
Brinell hardness number |
