Alloy AK7C9 used: for the manufacture of ingots and shaped castings by various casting methods (sand casting, investment casting, gravity die casting, pressure casting).

Note

Aluminum foundry alloy of the system Al-Si-Zn.

Standards

Name	Code	Standards
Non-ferrous metals, including rare, and their alloys	В51	GOST 1583-93, OST 4.021.009-92, OST 4.021.010-92
Castings, non-ferrous metals and alloys	В84	OST 1 80029-83

Chemical composition

Standard	Mn	Si	Fe	Cu	Al	Zn	Mg
GOST 1583-93	≤0.5	6-8	≤0.7	≤0.6	Rest	7-12	0.1-0.3

Al is the base.
According to GOST 1583-93, the iron content is specified for casting in sand molds and for investment models. The iron content for molding in the mold is ≤ 1.20%, with die casting ≤ 1.50%. The amount of impurities accounted for should be for casting in sand molds and for investment models ≤ 1.70%, casting in chill molds ≤ 1.90%, injection molding ≤ 2.50%.
According to OST 4.021.009-92 with a child under pressure, the absence of magnesium is allowed.

Mechanical properties

σ_U, MPa	d	HB, MPa
Casting. Without heat treatment
≥196	≥2	≥80
≥206	≥1	≥80
≥176	≥1	≥60
Casting. Mode T2: Annealing at 290-310 °C (2-4 h exposure)
≥216	≥2	≥80

Description mechanical marks

Name	Description
σ_U	Limit short-term strength
d	Elongation after rupture
HB	Brinell hardness number

Physical characteristics

Temperature	r, kg/m³
20	2940

A description of the physical symbols

Name	Description
l	Coefficient of thermal conductivity
С	Specific heat

Alloy AK7C9 (АЛ11)

Designation

Description