LA77-2

Pipe boards for condensers and heat exchangers; resistant to sea water machine parts; vysokonagruzhennnaya fittings

Classification

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

Chemical composition

Standard	Fe, %	Bi, %	Cu, %	Zn, %	Sb, %	Al, %	Pb, %	P, %
Standard	Fe, %	Bi, %	Cu, %	Zn, %	Sb, %	Al, %	Pb, %	P, %
GOST 15527-2004	< 0.07	< 0.002	76–79	18.2–22.25	< 0.005	1.7–2.5	< 0.07	< 0.01

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Physical characteristics

Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$
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	102	18.3	113	8300	0.075

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
Trumpet				soft	320	120	45
Trumpet				half-firm, solid	370	150	40

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Alloy		soft	450–550
Alloy		solid	1500–1600

Casting and technological parameters

melting point, °C	Hot working temperature, °C	annealing temperature, °C
melting point, °C	Hot working temperature, °C	annealing temperature, °C
1000	720–770	600–650

Analogues

Germany	USA
Germany	USA
SoMs76	SB 111 (C68700)

Standards

Standard	Description
Standard	Description
GOST 15527-2004
GOST 15527-70
GOST 21646-2003	GOST 21646-2003
TU 48-0809-3-85
DSTU GOST 15527:2005

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Bi	%	Bismuth
Cu	%	Copper
Zn	%	Zinc
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