Alloy aluminum AK9ch (AL4)

Chemical composition

Al	Aluminum	Rest
Fe	Iron	0.3 — 1.0
Si	Silicon	8.0 — 10.0
Mg	Magnesium	0.35 — 0.55
Mn	Manganese	0.1 — 0.6
Cu	Copper	0.3 — 1.5
Ni	Nickel	<0.3
Zn	Zinc	5.0 — 7.0
Ot	Total impurities	<0.6

Pb + Sn <0.3

Analogs in Russia

AK9TS6 GOST 1583−93

AK9TS6r GOST 1583−93

AL12 GOST 2171−90

AK9TS6 GOST R 55375−12

for the manufacture of parts of medium and high load; the alloy is highly tight. Due to the increased propensity for gas saturation and the formation of porosity, crystallization under pressure is recommended for castings. Alloy based on the aluminum — silicon — magnesium system (silumin)

Classification

Country	Section	Category
CIS, Russia, Ukraine	Aluminum, aluminum alloys	Foundry aluminum alloys

Chemical composition

Standard	Fe, %	Si, %	Be, %	Sn, %	Mg, %	Mn, %	Cu, %	Zn, %	Ni, %	Al, %	Pb, %
GOST 1583-93	< 1	8–10.5	< 0.1	< 0.01	0.17–0.3	0.2–0.5	< 0.3	< 0.3	< 0.1	86.84–91.63	< 0.05

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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			2650		46.8
100		21.7	155		755

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$$\sigma _{U}$$, $$MPa$$	d5, %	Treatment
Chill casting	GOST 1583-93				235	3	Hardening and artificial aging
Chill casting	GOST 1583-93				147	2

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Heat-treated steel.	GOST 1583-93		50–70

Analogues

USA	Germany
360	G-AlSi10Mg

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
Ni	%	Nickel
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
d5	%	Elongation at break
$$\sigma _{U}$$	$$MPa$$	Ultimate tensile strength