Alloy Ak8m3ch (ВАЛ8)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
АК8М3ч |
| Designation GOST Latin |
AK8M3ch |
| Transliteration |
AK8M3ch |
| The chemical elements |
- |
| Name |
The value |
| Designation GOST Cyrillic |
ВАЛ8 |
| Designation GOST Latin |
BAL8 |
| Transliteration |
VAL8 |
| The chemical elements |
ВAlЛ8 |
Description
Alloy Ak8m3ch used: for the manufacture of ingots and shaped castings by various casting methods (sand casting, investment casting, gravity die casting, pressure casting).
Note
Aluminum foundry alloy of the system Al-Si-Cu.
Standards
| Name |
Code |
Standards |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
GOST 1583-93 |
| Castings from non-ferrous metals and alloys |
В84 |
OST 1 80029-83, TU 1-92-100-85 |
Chemical composition
| Standard |
Si |
Fe |
Cu |
Al |
B |
Ti |
Zn |
Zr |
Mg |
Be |
Cd |
| GOST 1583-93 |
7-8.5 |
≤0.4 |
2.5-3.5 |
The rest |
0.005-0.1 |
0.1-0.25 |
0.5-1 |
≤0.15 |
0.2-0.45 |
0.05-0.25 |
≤0.15 |
Al is the base.
According to GOST 1583-93, the iron content is indicated for casting in sand molds, for the smelted models, in chill mold, under pressure. The amount of allowable impurities for all types of casting should be ≤ 0.60%.
Mechanical characteristics
| σB, MPa |
d |
Brinell hardness number, MPa |
| Casting. Without heat treatment |
| ≥294 |
≥2 |
≥75 |
| Casting. Mode T4: three-stage heating: 485-495 °C (extract 4-6 h) + 495-505 (extract 4-6 h) + 505-515 °C (extract 4-6 hours), quenching in water |
| ≥343 |
≥5 |
≥90 |
| Casting. Mode T5, Quenching in water with 505-515 °C + incomplete artificial aging at 155-165 °C (delay of 6-12 hours.) |
| ≥345 |
≥1 |
≥90 |
| ≥392 |
≥4 |
≥110 |
| ≥345 |
≥2 |
≥90 |
| ≥343 |
≥2 |
≥90 |
Description mechanical marks
| Name |
Description |
| σB |
Limit short-term strength |
| d |
Elongation after rupture |
Physical characteristics
| Temperature |
Е, ГПа |
r, кг/м3 |
| 20 |
72 |
2730 |
A description of the physical symbols
| Name |
Description |
| l |
Coefficient of thermal conductivity |
| С |
Specific heat |
