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
CIS, Russia, Ukraine Aluminum, aluminum alloys Wrought Aluminum Alloys

Chemical composition

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

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 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
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
Alloy 109–117

Analogues

USA
AA2018

Standards

Standard Description
GOST 4784-97

Description of chemical elements

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
$$E\cdot 10^{9}$$ $$MPa$$ 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
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\sigma_{P}$$ $$MPa$$ Proportionality limit
$$\epsilon_L$$ % Elongation at break (longitudinal)
$$KCU\cdot 10^{3}$$ $$\frac{J}{m^2}$$ Impact toughness