Metals that can be Permanent Mold Casted
ChinaSavvy works with a wide variety of metal alloys to produce quality magnesium, copper and aluminum permanent mold castings. Other materials also used in this casting process range from zinc and lead alloys, to tin, iron and steel.
Aluminum Gravity Die Casting
For aluminum permanent mold castings, ChinaSavvy is capable of casting the following alloys:
Exhibits a good resistance to corrosion and a very good resistance to hot cracking.
With an excellent fluidity, this alloy has a very good pressure tightness, resistance to hot cracking and a very good elevated temperature strength.
Having a good resistance to corrosion, this alloy used for aluminum gravity die casting has a fair machinability and a very good strength at elevated temperatures.
Having an excellent pressure tightness, this alloy has an excellent fluidity and good resistance to corrosion.
This alloy exhibits a good strength at elevated temperatures, a good machinability and excellent fluidity.
With a very good resistance to corrosion, this alloy has an excellent resistance to hot cracking, excellent fluidity and good machinability.
Exhibits a good strength at elevated temperatures, a very good resistance to corrosion and an excellent pressure tightness.
With a very good fluidity and an excellent pressure tightness, this alloy has a very good resistance to corrosion, machinability and resistance to hot cracking.
Exhibits a fair resistance to corrosion, good machinability, very good strength at elevated temperatures and an excellent resistance to hot cracking.
The 300 series are alloyed with manganese and can be work hardened. You can also learn more about aluminum grades and each grade’s characteristics.
Note: You can click on the table below to view a larger image.
Magnesium Permanent Mold Casting
This casting process is not only able to deliver high quality aluminum permanent mold castings, but magnesium castings as well. Nearly all the magnesium alloys that are suitable for sand casting, are suitable for permanent mold casting processes. The exception to this is the high zinc alloy ZK61A. This alloy is extremely hot short and seen as un-castable in permanent mold processes.
The most prevalent method for casting magnesium is die casting processes, but the following alloys (ASTM numbers) can be casted using permanent mold casting processes:
This magnesium alloy is composed of (in weight percentage) of 10% aluminum, 0.10% manganese, with the base being magnesium.
With a magnesium base, this alloy is composed of (in weight percentage) 7.60% aluminum, 0.70% zinc and 0.13% manganese.
Composed of (in weight percentage) of 0.70% zinc, 8.70% aluminum and 0.13% manganese, with a magnesium base.
Having a magnesium base, this alloy is composed of (in weight percentage) 2.00% zinc, 9.00% aluminum and 0.10% manganese.
*Note that the alloys mentioned above are also used in sand casting processes.
Copper Permanent Mold Casting
Due to the temperature and flowability requirements of the permanent mold casting process, copper based alloys used are limited. The copper based alloys used are divided into three groups:
This group (more specifically C85500, C85800 and B-2) is the most widely used copper based alloy in the US and Europe for decorative faucets and sanitary fittings. This group is characterized by its conductivity to buffing, polishing and plating.
High Conductivity Coppers
Used for electrical components and the most difficult group to cast, these alloys are characterized by their high melting points and susceptibility to oxygen pickup.
This group includes silicon brasses, aluminum bronzes and nickel silvers. This group of copper based alloys are the easiest to cast using permanent mold processes and are characterized by their fine finish, excellent resistance to corrosion and good physical properties. Note that this group of alloys are widely used in order to cast cutout hardware and water pump impellers.
Four main permanent mold casting techniques are applied in order to cast copper alloys:
- Hydraulic Tilt Pouring
- Bench Pouring
- Counter-gravity Vacuum Casting
- Counter-gravity Low-pressure Casting
ChinaSavvy, based in Guangzhou, China, with offices in the UK and US, is able to deliver copper, magnesium and aluminum gravity die casting services. All our castings, including our high quality aluminum permanent mold castings, meet world-class standards and our team of industry professionals operate to ISO 9001:2008 standards.
Back to Main Page: Permanent Mold (Gravity) Casting.
Further Suggested Reading:
- Permanent Mold Casting Process
- Permanent Mold Casting Tolerances
- Surface Finishes for Permanent Mold Castings
- The Limitations of Casting Using Permanent Mold Processes
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