LMtsA57-3-1

Product average strength, high toughness, corrosion resistance

Classification

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

Chemical composition

Standard	Fe, %	Bi, %	Mn, %	Cu, %	Zn, %	Sb, %	Al, %	Pb, %	P, %
GOST 15527-2004	< 1	< 0.002	2.5–3.5	55–58.5	35.2–42	< 0.005	0.5–1.5	< 0.2	< 0.01

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Physical characteristics

Temperature, °C	$$E\cdot 10^{9}$$, $$MPa$$	$$\alpha\cdot 10^{6}$$, $$K^{-1}$$	$$\varkappa$$, $$\frac{W}{m\cdot K}$$	$$\rho$$, $$\frac{kg}{m^3}$$	$$R\cdot 10^{-6}$$, $$\Omega\cdot m$$
20	104		67	8100	0.121
100		20.1

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$$\sigma _{U}$$, $$MPa$$	$$\epsilon_L$$, %	Treatment
Alloy				soft	400–500	40–50
Alloy				solid	700–750	4–8

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Alloy		soft	850–950
Alloy		solid	1750–1850

Casting and technological parameters

melting point, °C	Hot working temperature, °C	annealing temperature, °C
870	650–750	600–700

Standards

Standard	Description
GOST 15527-2004

Description of chemical elements

Element	Units of measurement	Description
Fe	%	Iron
Bi	%	Bismuth
Mn	%	Manganese
Cu	%	Copper
Zn	%	Zinc
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
$$\epsilon_L$$	%	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