Designation
| Name |
The value |
| Designation GOST Cyrillic |
27Х5ГСМЛ |
| Designation GOST Latin |
27X5GCML |
| Transliteration |
27H5GSML |
| By chemical elements |
27Cr5MnСMo |
Description
27KH5GSML steel is used: for the manufacture of castings of high-loaded details of responsible use thickness and above of wall up to 50mm, working in conditions of impact loads and shock-abrasive wear.
Standards
| Name |
Code |
Standards |
| Steel castings |
В82 |
GOST 977-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Fe |
Mo |
| GOST 977-88 |
0.24-0.28 |
≤0.02 |
≤0.02 |
0.9-1.2 |
5-5.5 |
0.9-1.2 |
Rest |
0.55-0.6 |
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 |
≥1177 |
≥1472 |
≥5 |
≥20 |
≥392 |
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 |
