Alloy ML3
Designation
| Name |
The value |
| Designation GOST Cyrillic |
МЛ3 |
| Designation GOST Latin |
ML3 |
| Transliteration |
ML3 |
| The chemical elements |
CuЛ3 |
Description
Alloy ML3 is used: for the manufacture of castings of parts of simple configuration and high containment (valves, parts of housings, pumps, etc.) with maximum operating temperature +150 °C; casting of parts subject to dynamic loads.
Note
Alloy system Mg-Al-Zn. The alloy has high integrity alloys of this group.
Aluminum and zinc increase the mechanical properties of the alloy (and the effect of aluminum effect is stronger than zinc) and manganese improves corrosion resistance. To reduce oxidation, the alloy is injected beryllium (0.002% when casting in sand molds and the mold and to 0.01% when casting under pressure).
The alloy has a broader crystallization range than alloys based on aluminum, therefore has a low castability. Due to the large interval of crystallization of the alloy is prone to hot cracks.
Standards
| Name |
Code |
Standards |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
GOST 2856-79 |
Chemical composition
| Standard |
Mn |
Si |
Ni |
Fe |
Cu |
Al |
Zn |
Zr |
Mg |
Be |
| GOST 2856-79 |
0.15-0.5 |
≤0.25 |
≤0.01 |
≤0.06 |
≤0.1 |
2.5-3.5 |
0.5-1.5 |
≤0.002 |
The rest |
≤0.002 |
Mg is the basis.
According to GOST 2856-79, the content of other impurities is ≤ 0.10%, the sum of the impurities to be determined is 0.50%.
Mechanical characteristics
| Section, mm |
σB, MPa |
d5, % |
| Casting in a sand mold without heat treatment according to GOST 2856-79 |
|
≥160 |
≥6 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
Physical characteristics
| Temperature |
Е, ГПа |
r, кг/м3 |
l, Вт/(м · °С) |
С, Дж/(кг · °С) |
| 20 |
43 |
1780 |
1047 |
10467 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
