L68

Wire mesh belt radiator, heat exchanger tubes; Details obtained by deep drawing;

Classification

Country Section Category
CIS, Russia, Ukraine Brass (copper-zinc alloy) Brass, pressure treated

Chemical composition

Standard Fe, % Bi, % Cu, % Zn, % Sb, % Pb, % P, %
GOST 15527-2004 < 0.1 < 0.002 67–70 29.7–33 < 0.005 < 0.03 < 0.01

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Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$ $$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$ $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
20 112 113 8500 0.072
100 19 0.3768

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\epsilon_L$$, % Treatment
Trumpet soft 290
Wire soft 290–370 20–40
Wire solid 540–930
Tape solid, cold rolling 430–540 10
Tape cold rolling 290–340 50
Tape soft, cold rolling 290–370 42

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Sheet soft 0–0
Sheet solid 0–0

Casting and technological parameters

melting point, °C Hot working temperature, °C annealing temperature, °C
938 700–850 550–650
L68 / Aloro

Standards

Standard Description
GOST 15527-2004
GOST 1018-15
GOST 1066-15
GOST 11383-16
GOST 15527-70
GOST 21646-2003 GOST 21646-2003
GOST 2208-07
GOST 494-14
GOST 5362-78
GOST Р 54158-10
DSTU GOST 15527:2005
DSTU GOST 2208:2008

Description of chemical elements

Element Units of measurement Description
Fe % Iron
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
$$c\cdot 10^{-3}$$ $$\frac{J}{kg\cdot K}$$ 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
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\epsilon_L$$ % 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