Designation
| Name |
The value |
| Designation GOST Cyrillic |
30Х3С3ГМЛ |
| Designation GOST Latin |
30X3C3GML |
| Transliteration |
30H3S3GML |
| By chemical elements |
30Cr3С3MnMo |
Description
30KH3S3GML steel is used: for the manufacture of castings of highly loaded parts for critical applications with wall thickness up to 30 mm, which meet the requirement of high strength and sufficient toughness.
Standards
| Name |
Code |
Standards |
| Steel castings |
В82 |
GOST 977-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Fe |
Mo |
| GOST 977-88 |
0.29-0.33 |
≤0.02 |
≤0.02 |
0.7-1.2 |
2.8-3.2 |
2.8-3.2 |
Rest |
0.5-0.6 |
Fe is the basis.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
| Normalization at 970-990 °C + vacation at 700-720 °C, air cooling + tempering air from 980-1000 °C + vacation at 200-220 °C, air cooling |
| 100 |
≥1472 |
≥1766 |
≥4 |
≥15 |
≥196 |
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 |
