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

σ_U, 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
σ_U	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

Alloy Ak8m3ch (ВАЛ8)

Designation

Description