Designation
| Name |
The value |
| Designation GOST Cyrillic |
30ГЛ |
| Designation GOST Latin |
30GL |
| Transliteration |
30GL |
| By chemical elements |
30Mn |
Description
30GL steel is used: for the manufacture of castings for the tool; casings of shock-absorbing units of freight cars.
Note
Steel martensitic class. Wear resistant steel, heat resistant.
Standards
| Name |
Code |
Standards |
| Castings with special properties (iron and steel) |
В83 |
GOST 21357-87 |
| Steel castings |
В82 |
GOST 977-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
| GOST 977-88 |
0.25-0.32 |
≤0.04 |
≤0.04 |
1.4-1.7 |
- |
0.2-0.5 |
- |
Rest |
- |
| GOST 21357-87 |
0.25-0.35 |
≤0.02 |
≤0.02 |
1.2-1.6 |
≤0.3 |
0.2-0.5 |
≤0.3 |
Rest |
≤0.3 |
Fe is the basis.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d |
y, % |
KCU, kJ/m2 |
| Hardening in air, 840-860 °C + vacation at 570-610 °C air cooling |
| 100 |
≥481 |
≥628 |
≥16 |
≥20 |
≥235 |
| Normalization at 860-890 °C + vacation at 550-650 °C, air cooling |
| 100 |
≥334 |
≥579 |
≥20 |
≥25 |
≥206 |
| Casting. Quenching in water from 920-950 °C + vacation at 600-650 °C, air cooling (KCU-60) |
| - |
≥490 |
≥660 |
≥10 |
≥20 |
≥3 |
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 |
