LA85-0.5

It serves as a substitute for gold in the production of badges, accessories and jewelry; high corrosion resistance

Classification

Country Section Category
CIS, Russia, Ukraine Brass (copper-zinc alloy) Brass, pressure treated

Chemical composition

Standard Fe, % Bi, % Cu, % Zn, % Sb, % Al, % Pb, %
TU 48-08-495-71 < 0.01 < 0.002 84–85.6 14–15 < 0.005 0.4–0.7 < 0.03

Information on suppliers

Physical characteristics

Temperature, °C $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$ $$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$
20 18.6 108.8 8600 0.3768

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\epsilon_L$$, % $$\psi$$, % Treatment
Alloy soft 295–390 60 50
Alloy solid 490–690 3–10

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy solid 0–0
Alloy Cast 0–0

Casting and technological parameters

melting point, °C Hot working temperature, °C annealing temperature, °C
1020 800–850 650–700

Standards

Standard Description
TU 48-08-495-71

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Bi % Bismuth
Cu % Copper
Zn % Zinc
Sb % Antimony
Al % Aluminium
Pb % Lead

Description of physical characteristics

Parameter Units of measurement Description
$$\alpha\cdot 10^{6}$$ $$K^{-1}$$ 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)

Description of mechanical properties

Parameter Units of measurement Description
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\epsilon_L$$ % Elongation at break (longitudinal)
$$\psi$$ % Reduction in cross section on fracture

Description of the casting and technological parameters

Parameter Units of measurement Description
melting point °C The temperature at which solid crystalline body makes the transition to the liquid state and Vice versa
Hot working temperature °C The temperature at which the plastic-deformed metal recrystallizes during the pressure treatment
annealing temperature °C The temperature at which the processes return recrystallization and homogenization of the metal to reduce its hardness for subsequent machining