Alloy AK8M (АЛ32)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
АК8М |
| Designation GOST Latin |
AK8M |
| Transliteration |
AK8M |
| The chemical elements |
- |
| Name |
The value |
| Designation GOST Cyrillic |
АЛ32 |
| Designation GOST Latin |
AL32 |
| Transliteration |
AL32 |
| The chemical elements |
- |
Description
Alloy AK8M 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. The alloy has high integrity.
Standards
| Name |
Code |
Standards |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
GOST 1583-93, TU 48-26-10-77 |
| Castings from non-ferrous metals and alloys |
В84 |
OST 1 80029-83 |
Chemical composition
| Standard |
Mn |
Si |
Fe |
Cu |
Al |
Ti |
Zn |
Zr |
Mg |
| GOST 1583-93 |
0.3-0.5 |
7.5-9 |
≤0.7 |
1-1.5 |
The rest |
0.1-0.3 |
≤0.3 |
≤0.1 |
0.3-0.5 |
Al is the base.
According to GOST 1583-93, the iron content is specified for casting in sand molds and for investment models. The iron content for casting in mold is ≤ 0.80%, when casting under pressure ≤ 0.90%. The amount of allowable impurities should be for casting in sand molds and for investment models ≤ 0.90%, casting in chill molds ≤ 1.00%, injection molding ≤ 1.10%.
Mechanical characteristics
| σB, MPa |
d |
Brinell hardness number, MPa |
| Casting molding. Without heat treatment |
| ≥255 |
≥2 |
≥70 |
| Casting molding. Mode T2: Annealing at 270-290 °C (excerpt 5-8 hours) |
| ≥235 |
≥2 |
≥60 |
| Casting. Mode T1: Artificial aging without prior tempering at 190-210 °C (excerpt 5-8 hours) |
| ≥176 |
≥0.5 |
≥60 |
| ≥196 |
≥1.5 |
≥70 |
| ≥284 |
≥1 |
≥90 |
| Casting. Mode T5: two-stage heating: 500-510 °C (extract 4-6 h), 510-520 °C (delay of 4-8 hours), quenching in water + incomplete artificial aging at 145-155 °C (extract 10-15 hours) |
| ≥235 |
≥2 |
≥60 |
| ≥255 |
≥2 |
≥70 |
| Casting. T6 mode: Quenching in water from 510-520 °C (extract 2-8 h) + Complete artificial aging at 165-175 °With (extract 8-16 h) |
| ≥245 |
≥1.5 |
≥60 |
| ≥265 |
≥2 |
≥70 |
| Casting. Mode T7: two-stage heating: 500-510 °C (extract 4-6 h), 510-520 °C (delay of 4-8 hours), quenching in water with a temperature of 80-100 °C+ stabilizing vacation at 225-235 °C (aging for 3-5 hours) |
| ≥225 |
≥2 |
≥60 |
| ≥245 |
≥2 |
≥60 |
Description mechanical marks
| Name |
Description |
| σB |
Limit short-term strength |
| d |
Elongation after rupture |
Physical characteristics
| Temperature |
Е, ГПа |
r, кг/м3 |
| 20 |
71 |
2650 |
A description of the physical symbols
| Name |
Description |
| l |
Coefficient of thermal conductivity |
| С |
Specific heat |
