AL9 (AK7ch)
For the manufacture of shaped castings; The alloy has a high tightness.
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Aluminum, aluminum alloys |
Foundry aluminum alloys |
Chemical composition
| Standard |
Fe, % |
Si, % |
Be, % |
Sn, % |
Mg, % |
Mn, % |
Cu, % |
Zn, % |
Al, % |
Pb, % |
|---|
| GOST 1583-93 |
< 1.5 |
6–8 |
< 0.1 |
< 0.01 |
0.2–0.4 |
< 0.5 |
< 0.2 |
< 0.3 |
89.6–93.8 |
< 0.05 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$E\cdot 10^{9}$$, $$MPa$$ |
$$\alpha\cdot 10^{6}$$, $$K^{-1}$$ |
$$\varkappa$$, $$\frac{W}{m\cdot K}$$ |
$$\rho$$, $$\frac{kg}{m^3}$$ |
$$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$ |
$$R\cdot 10^{-6}$$, $$\Omega\cdot m$$ |
|---|
| 20 |
0.7 |
|
|
2660 |
|
45.7 |
| 100 |
|
21.8 |
155 |
|
880 |
|
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{Y}$$, $$MPa$$ |
$$\sigma_{0.5}$$, $$MPa$$ |
Treatment |
|---|
| Casting |
|
|
|
in sandy form |
170 |
120 |
2 |
|
| Casting |
|
|
|
in chill mold |
230 |
140 |
4 |
|
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
| Alloy |
|
|
45–70 |
Casting and technological parameters
Analogues
| USA |
Germany |
|---|
| 323 |
G-AlSi7Mg |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Be |
% |
Beryllium |
| Sn |
% |
Tin |
| Mg |
% |
Magnesium |
| Mn |
% |
Manganese |
| Cu |
% |
Copper |
| Zn |
% |
Zinc |
| Al |
% |
Aluminium |
| Pb |
% |
Lead |
Description of physical characteristics
| Parameter |
Units of measurement |
Description |
| $$E\cdot 10^{9}$$ |
$$MPa$$ |
Elastic modulus |
| $$\alpha\cdot 10^{6}$$ |
$$K^{-1}$$ |
Coefficient of thermal (linear) expansion (range 20°C–T) |
| $$\varkappa$$ |
$$\frac{W}{m\cdot K}$$ |
Coefficient of thermal conductivity (the heat capacity of the material) |
| $$\rho$$ |
$$\frac{kg}{m^3}$$ |
The density of the material |
| $$c\cdot 10^{-3}$$ |
$$\frac{J}{kg\cdot K}$$ |
The specific heat of the material (range 20°C–T) |
| $$R\cdot 10^{-6}$$ |
$$\Omega\cdot m$$ |
Electrical resistivity |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| $$\sigma_{Y}$$ |
$$MPa$$ |
Yield strength |
| $$\sigma_{0.5}$$ |
$$MPa$$ |
Tensile stress required to produce a total elongation of 0.5% |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
Description of the casting and technological parameters
| Parameter |
Units of measurement |
Description |
| linear shrinkage |
% |
The difference between model dimensions and the model casting |