Alloy Ak7pch (АЛ9-1)

Designation

Name	The value
Designation GOST Cyrillic	АК7пч
Designation GOST Latin	AK7pch
Transliteration	AK7pch
By chemical elements	-

Name	The value
Designation GOST Cyrillic	АЛ9-1
Designation GOST Latin	AL9-1
Transliteration	AL9-1
By chemical elements	-

Description

Alloy Ak7pch used: for the manufacture of various ingots and shaped castings by various casting methods (sand casting, investment casting, gravity die casting, pressure).

Note

Aluminum foundry alloy of the system Al-Si-Mg. The alloy has high integrity.

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, OST 1 90180-75

Chemical composition

Standard	Mn	Si	Fe	Cu	Al	B	Ti	Zn	Sn	Pb	Zr	Mg	Be
GOST 1583-93	≤0.1	7-8	≤0.3	≤0.1	Rest	≤0.1	0.15	≤0.2	≤0.005	≤0.03	≤0.15	0.25-0.4	≤0.1
OST 1 90180-75	≤0.1	7-8	≤0.3	≤0.1	Rest	≤0.1	0.08-0.15	≤0.3	≤0.005	≤0.03	≤0.2	0.25-0.4	≤0.1

Al is the base.
According to GOST 1583-93, the iron content is specified for casting in sand molds and for investment models. The iron content for casting in the mold is ≤ 0.40%, with die casting ≤ 0.50%. The amount of allowable impurities should be for casting in sand molds and for investment models ≤ 0.60%, casting in chill molds ≤ 0.70%, injection molding ≤ 0.80%.
According to OST 1 90180-75, the amount of impurities to be accounted for should be for casting in sand molds, for melted models, casting into chill molds, casting into shell molds should be ≤ 0.60%.

Mechanical properties

σ_U, MPa	d	HB, MPa
Castings of high strength. Mode T5: Quenching in water from 530-540 °C (excerpt 2-16 h) + incomplete artificial aging at 150 °C (extract 3-10 h) Time between quenching and aging shall not exceed 3 hours
≥235	≥2.5	-
≥265	≥3	-
≥266	≥2	-
≥235	≥2.5	-
≥177	≥2	-
≥206	≥2.5	-
Castings of high strength. T6 mode: Quenching in water from 530-540 °C (excerpt 2-16 h) + Complete artificial aging at 175 °C (extract 3-10 h)
≥255	≥2	-
≥294	≥3	-
≥235	≥1.5	-
≥255	≥2	-
≥206	≥1	-
≥221	≥1.5	-
Casting, including alloy, modified (m). Mode T4: Quenching in water from 530-540 °C (delay of 2-12 hrs)
≥196	≥5	≥50
≥225	≥5	≥50
Casting, including alloy, modified (m). Mode T5: Quenching in water from 530-540 °C (exposure 2-12 h) + incomplete artificial aging at 145-155 °C (extract 3-10 h)
≥235	≥4	≥60
Casting, including alloy, modified (m). T6 mode: Quenching in water from 530-540 °C (exposure 2-12 h) + Complete artificial aging at 170-180 °C (extract 3-10 h)
≥274	≥2	≥70
≥294	≥3	≥70
Casting, including alloy, modified (m). Mode T7: Quenching in water from 530-540 °C (delay of 2-12 hrs) + vacation stabilizing at 215-235 °C (aging for 3-5 hours)
≥206	≥2.5	≥60
Casting, including alloy, modified (m). Mode T8: Quenching in water from 530-540 °C (exposure 2-12 h) + soothing vacation at 240-260 °C (aging for 3-5 hours)
≥167	≥3.5	≥55
Casting. Without heat treatment
≥196	≥1	≥50
Casting. Mode T2: Annealing at 240-260 °C (2-4 h exposure)
≥167	≥2	≥45

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	2660	457

A description of the physical symbols

Name	Description
l	Coefficient of thermal conductivity
С	Specific heat