BrB2 (CuBe2Ni (Co))

Springs, springy parts-duty, wear-resistant parts of all kinds, non-sparking tools


Country Section Category
CIS, Russia, Ukraine Bronze Pressureless bronze plated

Chemical composition

Standard Fe, % Si, % Be, % Cu, % Ni, % Al, % Pb, %
GOST 18175-78 < 0.15 < 0.15 1.8–2.1 96.9–98 0.2–0.5 < 0.15 < 0.005

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$ $$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$ $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
20 131 84 8200 0.07
100 16.6 0.419

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{P}$$, $$MPa$$ $$\epsilon_L$$, % Treatment
Wire soft 343–686 15–60
Wire solid 735–1372
Tape soft 390–590 20–30
Tape solid 590–930 2.5
Alloy soft 400–600 196–344 40–50
Alloy solid 600–950 588–930 2–4

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Round soft 100–150
Round solid 150

Casting and technological parameters

melting point, °C Hot working temperature, °C annealing temperature, °C
955 750–800 530–650


Germany USA
2.1447 C17200


Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Be % Beryllium
Cu % Copper
Ni % Nickel
Al % Aluminium
Pb % Lead

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)

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