Alloy MA18
Designation
| Name |
The value |
| Designation GOST Cyrillic |
МА18 |
| Designation GOST Latin |
MA18 |
| Transliteration |
MA18 |
| The chemical elements |
CuAl18 |
Description
Alloy MA18 is used: for the manufacture of semi-finished products (sheets, plates, bars, rods, profiles, strips, tubes, wire, stampings and forgings) by hot deformation, as well as ingots and slabs intended for the production of lightly loaded parts operating at temperatures from -253 °C to +60 °C when you want high stiffness and low weight.
Standards
| Name |
Code |
Standards |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
GOST 14957-76 |
Chemical composition
| Standard |
Mn |
Si |
Ni |
Fe |
Cu |
Al |
Zn |
Ce |
Mg |
Be |
Na |
Li |
K |
| GOST 14957-76 |
0.1-0.4 |
≤0.15 |
≤0.005 |
≤0.05 |
≤0.05 |
0.5-1 |
2-2.5 |
0.15-0.35 |
The rest |
≤0.002 |
≤0.01 |
10-11.5 |
≤0.005 |
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, % |
y, % |
Brinell hardness number, MPa |
| Rolled steel in the delivery state |
|
≥150 |
≥185 |
≥30.5 |
≥60 |
≥60 |
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 |
| y |
The relative narrowing |
