BrOTs4-3

Tapes, strips, rods, used in electrical engineering, mechanical engineering; wire for springs, contacts, plug sockets, chemical equipment parts; wire for manual welding in protective gases copper mechanized submerged arc welding of copper and brass

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Bronze	Pressure Tin Bronze

Chemical composition

Standard	Fe, %	Si, %	Sn, %	Bi, %	Cu, %	Zn, %	Ni, %	Sb, %	Al, %	Pb, %	P, %
Standard	Fe, %	Si, %	Sn, %	Bi, %	Cu, %	Zn, %	Ni, %	Sb, %	Al, %	Pb, %	P, %
GOST 5017-2006	< 0.05	< 0.002	3.5–4	< 0.002	92.2–93.8	2.7–3.3	< 0.3	< 0.002	< 0.002	< 0.02	< 0.03

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Physical characteristics

Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$
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	122		84	8800	0.09
100		18

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
Round		42–120		compacting	270		35
Round		5–40		broach	310–430		12–20
Wire				solid	760–880		0.5–2
Tape				soft	290	110	35–38
Tape				solid	540–690	510–670	2–4

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Alloy		soft	500–700
Alloy		solid	1500–1700

Casting and technological parameters

melting point, °C	Hot working temperature, °C	annealing temperature, °C
melting point, °C	Hot working temperature, °C	annealing temperature, °C
1045	700–800	550–650

Analogues

Germany
Germany
CuSn4Zn4
2.107

Standards

Standard	Description
Standard	Description
GOST 5017-2006	Wrought tin bronzes. Grades
GOST 5017-74
GOST 1761-16
GOST 1761-92
GOST 5221-08
GOST 6511-14
DSTU GOST 5017:2007
DSTU GOST 5221:2009

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Sn	%	Tin
Bi	%	Bismuth
Cu	%	Copper
Zn	%	Zinc
Ni	%	Nickel
Sb	%	Antimony
Al	%	Aluminium
Pb	%	Lead
P	%	Phosphorus

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
$R\cdot 10^{-6}$	$\Omega\cdot m$	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