BrB2 (CuBe2Ni (Co))

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

Classification

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

Chemical composition

Standard	Fe, %	Si, %	Be, %	Cu, %	Ni, %	Al, %	Pb, %
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

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Physical characteristics

Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$	$c\cdot 10^{-3}$ , $\frac{J}{kg\cdot K}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$
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
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
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
melting point, °C	Hot working temperature, °C	annealing temperature, °C
955	750–800	530–650

Analogues

Germany	USA
Germany	USA
2.1447	C17200

Standards

Standard	Description
Standard	Description
GOST 18175-78
GOST 15834-16
GOST 15834-77
GOST 1789-13

Description of chemical elements

Element	Units of measurement	Description
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
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
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
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