Alloy composition is just one part of the equation for quality parts.
All alloys have unique physical characteristics to match specific engineering applications. The alloy affects the structural strength of a casting, the skin versus the core of the casting, and the ability to control the process to make the best use of the material.
While it is important to examine the composition of different alloys, it is just as important to ensure the purity of that composition.
Contamination of an alloy can easily result from two common practices:
• Re-melting metal that has already been through the casting process, such as scrap or defective parts.
• Re-melting runners or overflows from the casting process.
Over time, the gradual erosion of tooling can introduce traces of elements such as iron into the casting. These trace elements can slowly creep above acceptable ranges of a specified alloy when they are added back into the melt. Although higher levels of Iron (Fe) can help the die casting process by reducing sticking of the part in the tooling, it can produce an alloy that is out of spec over time if not managed well.
To eliminate the risk of contamination, A&B Die Casting never re-melts runners or overflows from our castings.
• A&B Die Casting sends all runners and overflows to our outside suppliers for recycling and requalifying of the alloy.
• A&B sources all our metal from top-quality suppliers Custom Alloy Light Metals and CASS located in the United States.
• A&B tooling uses premium H-13 that exceeds NADCA 207-2003 Superior Specification or better to resist erosion.
A&B Die Casting ensures the material our customers’ order is the material we pour for our castings.