Aluminum Alloy 1985PCh

No foreign analogues

Designed for the production of forgings and parts of aerospace engineering


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

Chemical composition

Standard Fe, % Si, % Be, % Mg, % Mn, % Cr, % Ti, % Cu, % Zn, % Zr, % Al, % Примеси, %
OST 5Р.9466-88 < 0.15 < 0.1 0.0005–0.002 5–5.9 0.25–0.5 0.1–0.2 < 0.07 < 0.05 2.2–2.8 0.08–0.2 89.878–92.3695 < 0.15

Information on suppliers

Physical characteristics

Temperature, °C $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$ Cp, Дж/кг·К
20 21.9 119 2900 0.7961

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ d5, % Treatment
Forgings OST 1 90026-80 100–400 Transverse raw, compacting, fat, Transverse 660 360 6–8

Твёрдость по Роквеллу

Rolling Standard Classifiers Value, HRC
Forgings OST 1 90026-80 raw, compacting, fat, Transverse 28–32

Technological Properties

Weldability Flake Susceptibility Propensity to temper brittleness
Difficult to weld insensitive not inclined


Сплав 1985ч


Standard Description
OST 5Р.9466-88

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Примеси % Impurities
Si % Silicon
Be % Beryllium
Mg % Magnesium
Mn % Manganese
Cr % Chrome
Ti % Titan
Cu % Copper
Zn % Zinc
Zr % Zirconium
Al % Aluminium

Description of physical characteristics

Parameter Units of measurement Description
Cp Дж/кг·К Specific heat of material
$$\alpha\cdot 10^{6}$$ $$K^{-1}$$ 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
d5 % Elongation at break
$$\sigma_{Y}$$ $$MPa$$ Yield strength
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength

Designation of types of weldability

Parameter Units of measurement Description
no limits Welding is performed without heating and without subsequent heat treatment
Boundedly welded Welding is possible with heating up to 100–120 °C and subsequent heat treatment
Difficult to weld For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing
Not applicable for welded structures