Alloy Ak8m3ch (ВАЛ8)

Designation

Name The value
Designation GOST Cyrillic АК8М3ч
Designation GOST Latin AK8M3ch
Transliteration AK8M3ch
By chemical elements -
Name The value
Designation GOST Cyrillic ВАЛ8
Designation GOST Latin BAL8
Transliteration VAL8
By chemical elements ВAlЛ8

Description

Alloy Ak8m3ch 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-Cu.

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, TU 1-92-100-85

Chemical composition

Standard Si Fe Cu Al B Ti Zn Zr Mg Be Cd
GOST 1583-93 7-8.5 ≤0.4 2.5-3.5 Rest 0.005-0.1 0.1-0.25 0.5-1 ≤0.15 0.2-0.45 0.05-0.25 ≤0.15
Al is the base.
According to GOST 1583-93, the iron content is indicated for casting in sand molds, for the smelted models, in chill mold, under pressure. The amount of allowable impurities for all types of casting should be ≤ 0.60%.

Mechanical properties

σU, MPa d HB, MPa
Casting. Without heat treatment
≥294 ≥2 ≥75
Casting. Mode T4: three-stage heating: 485-495 °C (extract 4-6 h) + 495-505 (extract 4-6 h) + 505-515 °C (extract 4-6 hours), quenching in water
≥343 ≥5 ≥90
Casting. Mode T5, Quenching in water with 505-515 °C + incomplete artificial aging at 155-165 °C (delay of 6-12 hours.)
≥345 ≥1 ≥90
≥392 ≥4 ≥110
≥345 ≥2 ≥90
≥343 ≥2 ≥90

Description mechanical marks

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

Physical characteristics

Temperature Е, HPa r, kg/m3
20 72 2730

A description of the physical symbols

Name Description
l Coefficient of thermal conductivity
С Specific heat