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 |
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 |
|---|---|---|
| CIS, Russia, Ukraine | Aluminum, aluminum alloys | Wrought Aluminum Alloys |
Chemical composition
| 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 |
Information on suppliers
Physical characteristics
| Temperature, °C | $$E\cdot 10^{9}$$, $$MPa$$ | $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ | $$\varkappa$$, $$\frac{W}{m\cdot K}$$ | $$\rho$$, $$\frac{kg}{m^3}$$ |
|---|---|---|---|---|
| 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 |
|---|---|---|---|---|---|---|---|---|
| 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
Analogues
| Germany | USA |
|---|---|
| 2618 | 2618 |
Standards
| Standard | Description |
|---|---|
| GOST 4784-97 |
Description of chemical elements
| 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 |
|---|---|---|
| $$E\cdot 10^{9}$$ | $$MPa$$ | 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 |
|---|---|---|
| $$\sigma _{U}$$ | $$MPa$$ | Ultimate tensile strength |
| $$\sigma_{P}$$ | $$MPa$$ | Proportionality limit |
| $$\epsilon_L$$ | % | Elongation at break (longitudinal) |