Designation
| Name |
The value |
| Designation GOST Cyrillic |
АС30ХМ |
| Designation GOST Latin |
AC30XM |
| Transliteration |
AS30HM |
| By chemical elements |
- |
Description
AS30KHM steel is used: for the manufacture of automotive parts (steering worm).
Note
Lead-containing alloy steel high machinability.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В32 |
GOST 1414-75, GOST 14955-77, TU 14-1-2217-92 |
| Blanks. Of the workpiece. Slabs |
В31 |
TU 14-1-1515-75, TU 14-1-514-73 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
Mo |
Pb |
| GOST 1414-75 |
0.27-0.33 |
≤0.035 |
≤0.035 |
0.4-0.7 |
0.8-1.1 |
0.17-0.37 |
≤0.3 |
Rest |
≤0.3 |
0.15-0.25 |
0.15-0.3 |
Fe is the basis.
According to GOST 1414-75, the total mass fraction of sulfur and phosphorus should not exceed 0.060%.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
HB, MPa |
| Rental of calibrated and improved |
| ≤35 |
≥630 |
≥780 |
≥12 |
≥3.6 |
- |
≤285 |
| Bars up to 100 mm Quenching in oil with 860-880 °C + Vacation at 510-560 °C, air cooling |
| 15 |
≥735 |
≥880 |
≥12 |
- |
≥980 |
- |
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 |
| HB |
Brinell hardness number |
