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

σU, 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
σU 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