Alloy Ml5pch
Designation
Description
Alloy Ml5pch used: for the manufacture of shaped castings in sand and shell mold, permanent mold and pressure loaded parts with extreme operating temperature operation to +150 °C (long-term), up to +250 °C (short-term); parts of aircraft (parts management, parts of the wings, farm gear, buildings machines and devices); consumer goods (buildings, cameras, cameras, binoculars).
Note
Alloy system Mg-Al-Zn.
Alloy Ml5pch has fewer impurities and is therefore more ductile and more corrosion resistant than alloy ML5.
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 can strengthen its positions heat treatment — quenching and aging.
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
Chemical composition
According to GOST 2856-79 the sum of the detected impurities is 0.130%. With a simultaneous content of beryllium and zirconium, the mass fraction of beryllium should not exceed 0.0015%. In the alloy, the mass fraction of titanium is allowed to not exceed 0.005%.