σU
MPa
σP
MPa
ϵL

D21 (1210)

For the manufacture of engine parts and power components.

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Aluminum, aluminum alloys	Wrought Aluminum Alloys

Chemical composition

Standard	Fe, %	Si, %	Mg, %	Mn, %	Ti, %	Cu, %	Zn, %	Al, %
Standard	Fe, %	Si, %	Mg, %	Mn, %	Ti, %	Cu, %	Zn, %	Al, %
GOST 4784-97	< 0.3	< 0.3	0.25–0.45	0.4–0.8	0.1–0.2	6–7	< 0.1	90.75–93.25

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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
Round					400	260	6

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Alloy			100

Standards

Standard	Description
Standard	Description
OST 1 90048-90
GOST 4784-97

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mg	%	Magnesium
Mn	%	Manganese
Ti	%	Titan
Cu	%	Copper
Zn	%	Zinc
Al	%	Aluminium

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)