BrBNT1.7

for springs and elastic elements; high strength and wear resistance, good sliding properties, very good formability in hardened condition

Classification

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

Chemical composition

Standard	Fe, %	Si, %	Be, %	Ti, %	Cu, %	Ni, %	Al, %	Pb, %
GOST 18175-78	< 0.15	< 0.15	1.6–1.85	0.1–0.25	97–98.1	0.2–0.4	< 0.15	< 0.005

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Physical characteristics

Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$
20	128		96.6	8200	0.09
100		17

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	Treatment
Tape				solid	590–930		2.5
Alloy				soft	400–500
Alloy				solid	600–900	529–830

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Alloy		soft	80–120
Alloy		solid	150–240

Casting and technological parameters

melting point, °C	Hot working temperature, °C
865	650–700

Analogues

Germany	USA
CuBe1.7	Alloy 165

Standards

Standard	Description
GOST 18175-78

Description of chemical elements

Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Be	%	Beryllium
Ti	%	Titan
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
$R\cdot 10^{-6}$	$\Omega\cdot m$	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