LO70-1
For semifinished products (bars, tubes, sheets, strips); and cold drawn tubes used in heat exchangers; condensers and heat exchangers
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Brass (copper-zinc alloy) |
Brass, pressure treated |
Chemical composition
| Standard |
Fe, % |
Sn, % |
Bi, % |
Cu, % |
Zn, % |
Sb, % |
Pb, % |
P, % |
|---|
| GOST 15527-2004 |
< 0.07 |
1–1.5 |
< 0.002 |
69–71 |
27.2–30 |
< 0.005 |
< 0.07 |
< 0.01 |
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 |
105 |
|
117 |
8600 |
0.072 |
| 100 |
|
19.7 |
|
|
|
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{P}$$, $$MPa$$ |
$$\epsilon_L$$, % |
Treatment |
|---|
| Trumpet |
|
|
|
soft |
320 |
100 |
45 |
|
| Trumpet |
|
|
|
half-firm, solid |
360 |
150 |
40 |
|
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
| Alloy |
|
soft |
550–650 |
| Alloy |
|
solid |
1450–1550 |
Casting and technological parameters
| melting point, °C |
Hot working temperature, °C |
annealing temperature, °C |
|---|
| 935 |
650–750 |
550–650 |
Coefficients of Friction
| coefficient of friction with lubrication |
coefficient of friction without lubrication |
|---|
| 0.0082 |
0.3 |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Sn |
% |
Tin |
| Bi |
% |
Bismuth |
| Cu |
% |
Copper |
| Zn |
% |
Zinc |
| Sb |
% |
Antimony |
| 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 |