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Alloy АЛ8

Designation

Name The value
Designation GOST Cyrillic АЛ8
Designation GOST Latin AL8
Transliteration AL8
The chemical elements -

Description

Alloy АЛ8 used: for the manufacture of shaped castings for various purposes; casting parts of valves and actuators to it.

Note

The alloy is resistant. АЛ8 alloy is prone to natural aging, which leads to a significant reduction in elongation.

Standards

Name Code Standards
Non-ferrous metals, including rare metals, and their alloys В51 GOST 2685-75
Thermal and thermochemical treatment of metals В04 OST 1 90088-80
Castings from non-ferrous metals and alloys В84 OST 26-07-1114-74

Chemical composition

Standard Mn Si Fe Cu Al Ti Zn Zr Mg Be
GOST 2685-75 ≤0.1 ≤0.3 ≤0.3 ≤0.1 The rest ≤0.07 ≤0.1 ≤0.2 9.3-10 ≤0.07
Al is the base.
According to GOST 2685-75, the iron content is specified for casting in sand and shell molds, for melted models, casting into chill molds, and injection molding. The amount of allowable impurities should be for casting in sand and shell molds, for the smelted models, casting in chill molds, and die casting ≤ 1.00%. To increase the mechanical properties by 15-20%, it is necessary to limit the content of iron and silicon impurities in the alloy to 0.030% of each.

Mechanical characteristics

σB, MPa d Brinell hardness number, MPa
Castings according to GOST 2685-75
≥284 ≥9 ≥60

Description mechanical marks

Name Description
σB Limit short-term strength
d Elongation after rupture

Physical characteristics

Temperature Е, ГПа r, кг/м3 R, НОм · м
20 70 2550 912

A description of the physical symbols

Name Description
l Coefficient of thermal conductivity
С Specific heat

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