AK4-1 (1141)

Chemical composition:

Fe	0.8 — 1.3
Si	up to 0.35
Mn	up to 0.2
Ni	0.8 — 1.3
Ti	0.02 — 0.1
Al	92.05 — 96.08
Cu	1.9 — 2.5
Mg	1.4 — 1.8
Zn	up to 0.3

For the manufacture of jet engine parts Technical requirements: GOST 4784−97 Deformable aluminum and alloys. GOST R 51834−01 grades. Extruded aluminum alloy bars of high strength and increased ductility. Technical conditions OST 1 92014−90 Wrought aluminum alloys. Stamps

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Aluminum, aluminum alloys	Wrought Aluminum Alloys

Chemical composition

Standard	Fe, %	Si, %	Mg, %	Mn, %	Cr, %	Ti, %	Cu, %	Zn, %	Ni, %	Al, %
Standard	Fe, %	Si, %	Mg, %	Mn, %	Cr, %	Ti, %	Cu, %	Zn, %	Ni, %	Al, %
GOST 4784-97	0.8–1.4	< 0.35	1.2–1.8	< 0.2	< 0.1	0.02–0.1	1.9–2.7	< 0.3	0.8–1.4	93.05–95.28

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Physical characteristics

Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$	$c\cdot 10^{-3}$ , $\frac{J}{kg\cdot K}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$
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	72			2800		0.055
100		20.8	146		0.797

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Sheet					380	310	6	200
Round	GOST 21488-97				365–390	275–315	6		Hardening and artificial aging
Round	GOST 51834-2001			increased plasticity	390	335	6		Hardening and artificial aging
Profile					400	330	8
Sheet	GOST 17232-99				385–390	295–325	6		Hardening and artificial aging

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Alloy			109–117

Analogues

USA
USA
AA2018

Standards

Standard	Description
Standard	Description
GOST 4784-97

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mg	%	Magnesium
Mn	%	Manganese
Cr	%	Chrome
Ti	%	Titan
Cu	%	Copper
Zn	%	Zinc
Ni	%	Nickel
Al	%	Aluminium

Description of physical characteristics

Parameter	Units of measurement	Description
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
Parameter	Units of measurement	Description
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\sigma_{P}$	$MPa$	Proportionality limit
$\epsilon_L$	%	Elongation at break (longitudinal)
$KCU\cdot 10^{3}$	$\frac{J}{m^2}$	Impact toughness