Alloy aluminum AK4 (1140, AKD4)

Chemical composition

Al	Aluminum	Rest
Fe	Iron	0.8 — 1.3
Si	Silicon	0.5 — 1.2
Mg	Magnesium	1.4 — 1.8
Mn	Manganese	<0.2
Cu	Copper	1.9 — 2.5
Ni	Nickel	0.8 — 1.3
Ti	Titanium	<0.1
Zn	Zinc	<0.3
OE	Other items	<0.05
ET	Total other items	<0.1

Analogs in Germany

2618A DIN EN 4632−002: 2008

EN AW-2618A DIN EN 573−3: 2013

EN AW-AlCu2Mg1.5Ni DIN EN 573−3: 2013

AU 2 GN ThyssenKrupp

Analogs in the USA

2618A

2618A AA

4132 AMS

AMS-A-22771 AMS

AA2018 ANSI

AA2218 ANSI

AA2618 ANSI

B 247 (2218) ASTM B247

B 247 (2618) ASTM B247

Alu-C Finkl & Sons Co.

A92218 UNS

A92618 UNS

2218 Included in 5 standards

2618 Included in 6 Standards

For the manufacture of jet engine parts. Technical requirements — according to GOST 4784−97 Aluminum and wrought aluminum alloys. GOST R 51834−01 grades. Extruded aluminum alloy bars of high strength and increased ductility. Technical conditions

Classification

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

Chemical composition

Standard	Fe, %	Si, %	Mg, %	Mn, %	Ti, %	Cu, %	Zn, %	Ni, %	Al, %
Standard	Fe, %	Si, %	Mg, %	Mn, %	Ti, %	Cu, %	Zn, %	Ni, %	Al, %
GOST 4784-97	0.8–1.3	0.5–1.2	1.4–1.8	< 0.2	< 0.1	1.9–2.5	< 0.3	0.8–1.3	91.2–94.6

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Physical characteristics

Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$
Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$
20	72		180	2770
100		22

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	Treatment
Round	GOST 21488-97				335		8	Hardening and artificial aging
Round				increased plasticity	375	275	8	Hardening and artificial aging
Round					360	260	3
Profile					335		8

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Alloy			100
Alloy		Hardening, aging	120

Analogues

Germany	USA
Germany	USA
2618	2618

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
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

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)