Designation
| Name |
The value |
| Designation GOST Cyrillic |
АК21М2,5Н2,5 |
| Designation GOST Latin |
AK21M2,5H2,5 |
| Transliteration |
AK21M25N25 |
| By chemical elements |
- |
| Name |
The value |
| Designation GOST Cyrillic |
ВКЖЛС-2 |
| Designation GOST Latin |
BKZhLC-2 |
| Transliteration |
VKGLS-2 |
| By chemical elements |
ВCoFeЛPb-2 |
Description
Alloy AK21M2,5N2,5 is used: for the manufacture of ingots and shaped castings in a mold.
Note
Aluminum foundry alloy of the system Al-Si-Cu.
Standards
| Name |
Code |
Standards |
| Non-ferrous metals, including rare, and their alloys |
В51 |
GOST 1583-93 |
| Castings, non-ferrous metals and alloys |
В84 |
OST 1 80029-83 |
Chemical composition
| Standard |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
Al |
Ti |
Zn |
Sn |
Pb |
Mg |
| GOST 1583-93 |
0.2-0.4 |
0.2-0.4 |
20-22 |
2.2-2.8 |
≤0.9 |
2.2-3 |
Rest |
0.1-0.3 |
≤0.2 |
≤0.01 |
≤0.05 |
0.2-0.5 |
Al is the base.
According to GOST 1583-93, the iron content is specified for injection molding. The amount of allowable impurities should be for die casting ≤ 1.10%.
Mechanical properties
| σU, MPa |
HB, MPa |
| Casting. Mode T1: Artificial aging without prior tempering at 200-220 °C (10-12 h exposure) |
| ≥186 |
≥100 |
Description mechanical marks
| Name |
Description |
| σU |
Limit short-term strength |
| HB |
Brinell hardness number |
