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Characteristics for grade D21 ( Д21 )

Grade :	D21 ( Д21 )
Classification :	Aluminium wrought alloys
Equivalent grades:	Is absent

Chemical composition in % for grade D21 ( Д21 )

Fe	Si	Mn	Ti	Al	Cu	Mg	Zn	Impurity
max 0.3	max 0.3	0.4 - 0.8	0.1 - 0.2	90.75 - 93.25	6 - 7	0.25 - 0.45	max 0.1	other, each 0.1; all 0.05

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

Mechanical properties under Т=20^oС for grade D21 ( Д21 )

Assortment	Dimension	Direct.	s_в	s_T	d₅	y	KCU	Heat treatment
-	mm	-	MPa	MPa	%	%	kJ / m²	-
Forging			400	260	6

Brinell hardness for D21 ( Д21 ) ,

HB 10^-1 = 100 MPa

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]

D21 ( Д21 ) - Aluminium wrought 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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