Alloy AK5M (АЛ5)

Designation

Name	The value
Designation GOST Cyrillic	АК5М
Designation GOST Latin	AK5M
Transliteration	AK5M
By chemical elements	-

Name	The value
Designation GOST Cyrillic	АЛ5
Designation GOST Latin	AL5
Transliteration	AL5
By chemical elements	-

Description

Alloy AK5M used: for the manufacture of ingots and shaped castings by various casting methods (sand casting, investment casting, gravity die casting, pressure casting); casting parts, metallurgical and transport equipment (heads and cylinders of air-cooled engines; parts of machines and devices working at temperatures above +225 °C) and other heavily loaded parts; casting parts of valves and actuators to it.

Note

Aluminum foundry alloy of the system Al-Si-Cu. Alloy high-strength heat-resistant.
Advantages: High mechanical strength, a satisfactory casting processing properties, weldability and corrosion resistance. Good machinability.
Disadvantages: Reduced ductility.

Standards

Name	Code	Standards
Non-ferrous metals, including rare, and their alloys	В51	GOST 1583-93, STP М287-78
Castings, non-ferrous metals and alloys	В84	OST 26-07-1114-74, OST 1 80029-83, OST 24.916.01-71

Chemical composition

Standard	Mn	Si	Fe	Cu	Al	Ti	Zn	Sn	Mg	Be
GOST 1583-93	≤0.5	4.5-5.5	≤0.6	1-1.5	Rest	-	≤0.3	≤0.01	0.35-0.6	≤0.1
OST 24.916.01-71	≤0.5	4.5-5.5	≤0.6	1-1.5	Rest	≤0.15	≤0.3	≤0.01	0.35-0.6	≤0.1

Al is the base.
According to GOST 1583-93 and OST 24.916.01-71, the iron content is specified for casting in sand molds and for investment models. The content of iron during casting in the mold is ≤ 1.00%, when casting under pressure ≤ 1.50%. The amount of allowable impurities should be for casting in sand molds and for investment models ≤ 1.00%, casting in chill molds ≤ 1.30%, injection molding ≤ 1.70%. The total content of titanium and zirconium should be ≤ 0.15%.
According to OST 24.916.01-71 the total content of titanium, chromium and manganese should not be more than 0.50%.
By STP M287-78, the total content of titanium and zirconium should not be more than 0.15%. The amount of allowable impurities should be for casting in sand molds ≤ 1.00%, casting in chill mold ≤ 1.30%. The iron content is indicated for sand casting. The iron content during casting in the mold is ≤ 1.00%.

Mechanical properties

σ_U, MPa	d	HB, MPa
Casting (in land, investment casting, gravity die casting). Mode T1: Artificial aging without prior tempering at 175-185 °C (extract 5-10 h)
≥157	≥0.5	≥65
Casting. Mode T5: Quenching in water from 520-530 °C (aging for 3-5 hours) + incomplete artificial aging at 170-180 °C (extract 5-10 h)
≥196	≥0.5	≥70
≥216	≥0.5	≥70
Casting. T6 mode: Quenching in water from 520-530 °C (aging for 3-5 hours) + Complete artificial aging at 195-205 °C (aging for 3-5 hours)
≥225	≥0.5	≥70
≥235	≥1	≥70
Casting. Mode T7: Quenching in water from 520-530 °C (aging for 3-5 hours) + vacation stabilizing at 220-240 °C (aging for 3-5 hours)
≥176	≥1	≥65

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	R, Mr. · m
20	70	2670	462

A description of the physical symbols

Name	Description
l	Coefficient of thermal conductivity
С	Specific heat