Alloy Ak9s

Designation

Name The value
Designation GOST Cyrillic АК9с
Designation GOST Latin AK9c
Transliteration AK9s
By chemical elements -

Description

Alloy Ak9s 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-Mg.

Standards

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

Chemical composition

Standard Mn Si Ni Fe Cu Al Zn Sn Pb Mg
GOST 1583-93 0.2-0.5 8-10.5 ≤0.1 ≤0.7 ≤0.5 Rest ≤0.3 ≤0.01 ≤0.05 0.2-0.35
Al is the base.
According to GOST 1583-93, the iron content is specified for casting in sand molds and for investment models. The content of iron during casting into the mold is ≤ 0.90%, when casting under pressure ≤ 1.00%. The amount of allowable impurities should be for casting in sand molds and for investment models ≤ 1,350%, casting in chill molds ≤ 1,70%, injection molding ≤ 1,80%.

Mechanical properties

σU, MPa d HB, MPa
Casting (gravity die casting, pressure) in the delivery condition. Without heat treatment
≥147 ≥2 ≥50
Casting in a metal mold. Mode T1: Artificial aging at 170-180 °C (excerpt 5-17 hours)
≥196 ≥1.5 ≥70
Casting in a metal mold. T6 mode: Quenching in water from 530-540 °C (extract 2-6 h) + Artificial aging at 170-180 °C (extract 10-15 hours)
≥235 ≥3.5 ≥70

Description mechanical marks

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