Alloy MA12
Designation
| Name |
The value |
| Designation GOST Cyrillic |
МА12 |
| Designation GOST Latin |
MA12 |
| Transliteration |
MA12 |
| The chemical elements |
CuAl12 |
Description
Alloy MA12 is used: for the manufacture of semi-finished products (sheets, plates, rods, sheets, tubes, wire, stampings and forgings) by hot deformation; extruded sections with cross sectional area up to 12 cm2 and a diameter of the circumscribed circle of up to 150 mm; ingots and slabs for the manufacture of the parts, the heating in the process of operation with maximum operating temperature up to +250 °C — long, up to +300 °C short — term.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В52 |
GOST 13616-97, GOST 13617-97, GOST 13618-97, GOST 13619-97, GOST 13620-90, GOST 13621-90, GOST 13622-91, GOST 13623-90, GOST 13624-90, GOST 13737-90, GOST 13738-91, GOST 17575-90, GOST 17576-97, GOST 19657-84, GOST 29296-92, GOST 29303-92, GOST Р 50066-92, GOST Р 50067-92, GOST Р 50077-92 |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
GOST 14957-76 |
Chemical composition
| Standard |
Mn |
Si |
Ni |
Fe |
Cu |
Al |
Zn |
Zr |
Nd |
Mg |
Be |
| GOST 14957-76 |
≤0.1 |
≤0.05 |
≤0.005 |
≤0.05 |
≤0.05 |
≤0.05 |
≤0.2 |
0.3-0.8 |
2.5-3.5 |
The rest |
≤0.002 |
Mg is the basis.
According to GOST 14957-76 the mass fraction of other impurities is ≤ 0.30%. "Other impurities" include impurities whose permissible content limits are not indicated (≤), as well as impurities not included in the table, the content of which is not determined. Beryllium is not determined, but is introduced by calculation.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
| Rolled steel in the delivery state |
|
130-180 |
230-280 |
9-12 |
| Extruded GOST 19657-84. Artificial aging |
|
≥165 |
≥235 |
≥5 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
