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Characteristics for grade АL21 ( АЛ21 )

Grade :	АL21 ( АЛ21 )
Classification :	Aluminium casting alloys
Equivalent grades:	Is absent

Chemical composition in % for grade АL21 ( АЛ21 )

Fe	Si	Mn	Ni	Cr	Al	Cu	Mg	Zn	Impurity
max 0.6	max 0.5	0.15 - 0.25	2.6 - 3.6	0.1 - 0.2	87.35 - 91.75	4.6 - 6	0.8 - 1.3	max 0.3	all 1.3

Comment: Al is a basis; the percentage of Al is given approximately.

Mechanical properties under Т=20^oС for grade АL21 ( АЛ21 )

Assortment	Dimension	Direct.	s_в	s_T	d₅	y	KCU	Heat treatment
-	mm	-	MPa	MPa	%	%	kJ / m²	-
			180-210		1
sand (mould) casting			220	200	1.5

Brinell hardness for АL21 ( АЛ21 ) ,

HB 10^-1 = 65 - 75 MPa

Technological properties of the material АL21 ( АЛ21 ) .

Linear shrinkage :

1.3 %

Physical properties for grade АL21 ( АЛ21 )

T	E 10^{- 5}	a 10⁶	l	r	C	R 10⁹
Grade	MPa	1/Grade	Watt/(m·Grade)	kg/m³	J/(kg·Grade)	Ohm·m
20			117.6	2830
100		22.9

Specification :

Mechanical properties :
s_в	- Tensile strength , [MPa]
s_T	- Yield stress, [MPa]
d₅	- Specific elongation at fracture , [ % ]
y	- Reduction of area , [ % ]
KCU	- Impact strength , [ kJ / m²]
HB	- Brinell hardness , [MPa]

Physical properties :
T	- Test temperature , [Grade]
E	- Young modulus , [MPa]
a	- Coefficient of linear expansion (range 20^o - T ) , [1/Grade]
l	- Termal (heat) condition coefficient , [Watt/(m·Grade)]
r	- Density , [kg/m³]
C	- Specific heat ( range 20^o - T ), [J/(kg·Grade)]
R	- Electrical resistance , [Ohm·m]

АL21 ( АЛ21 ) - Aluminium casting alloys: chemical composition, mechanical and physical properties, hardness
Database of steels and alloys (Marochnik) contains information about chemical composition and properties more then 3000 steels and alloys

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