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
CIS, Russia, Ukraine Bronze Pressure Tin Bronze

Chemical composition

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

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$ $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
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
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
Alloy soft 500–700
Alloy solid 1500–1700

Casting and technological parameters

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

Analogues

Germany
CuSn4Zn4
2.107

Standards

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
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
$$E\cdot 10^{9}$$ $$MPa$$ 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
annealing temperature °C The temperature at which the processes return recrystallization and homogenization of the metal to reduce its hardness for subsequent machining