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Alloy AK7C9 (АЛ11)

Designation

Name The value
Designation GOST Cyrillic АК7Ц9
Designation GOST Latin AK7Ts9
Transliteration AK7Ts9
The chemical elements -
Name The value
Designation GOST Cyrillic АЛ11
Designation GOST Latin AL11
Transliteration AL11
The chemical elements -

Description

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 metals, and their alloys В51 GOST 1583-93, OST 4.021.009-92, OST 4.021.010-92
Castings from 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 The 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 characteristics

σB, MPa d Brinell hardness number, 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
σB Limit short-term strength
d Elongation after rupture

Physical characteristics

Temperature r, кг/м3
20 2940

A description of the physical symbols

Name Description
l Coefficient of thermal conductivity
С Specific heat

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