Designation
| Name |
The value |
| Designation GOST Cyrillic |
30ХМЛ |
| Designation GOST Latin |
30XML |
| Transliteration |
30HML |
| By chemical elements |
30CrMo |
Description
30KHML steel is used: for the manufacture of castings to various industrial purpose.
Standards
| Name |
Code |
Standards |
| Steel castings |
В82 |
GOST 977-88 |
| Castings with special properties (iron and steel) |
В83 |
TU 26-16-162-85 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Fe |
Mo |
| GOST 977-88 |
0.25-0.35 |
≤0.04 |
≤0.04 |
0.5-0.8 |
0.8-1.2 |
0.2-0.5 |
Rest |
0.2-0.3 |
Fe is the basis.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d |
y, % |
KCU, kJ/m2 |
| Hardening in air, 840-870 °C to + leave in 530-670 °C, air cooling |
| 100 |
≥334 |
≥677 |
≥14 |
≥25 |
≥265 |
| Normalization when 850-890 °C + vacation at 550-650 °C, air cooling |
| 100 |
≥285 |
≥530 |
≥18 |
≥25 |
≥304 |
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 |