Die casting

ChinaTech Sourcing is able to source low cost, high quality die castings from a selection of pre-approved ISO 9000 and TS 16949 accredited factories in China. We have established links with dozens of highly regarded die casting suppliers – giving us a wide range of manufacturing capabilities to meet your individual die casting needs.

Die casting processes

In die casting, liquid metal (usually non-ferrous metals such as aluminium, copper, lead, magnesium, pewter, tin based alloys and zinc) is forced into a permanent metal mold, called a die. Unlike sand casting or shell casting, each of these dies can be reused 1,000s of times, making die casting extremely cost-effective for medium to high volumes.

There are different types of die casting, the choice of which depends on the production volume and shape complexity. They include:

  • High pressure die casting
  • Low pressure die casting
  • Gravity die casting (permanent mold casting)

Sourcing die castings from China

All our castings are quality assured and come from factories with appropriate measurement equipment, including laboratory testing, spectrometer, hardness / tensile testing, X-ray, microstructure testing and dimensional measurement such as CMM machines. Stringent metallurgical control systems ensure that chemical and mechanical properties meet exactly with our customers’ requirements.

We can supply most materials which are to equivalent ISO Western grades, for example:

  • Aluminium (LM4, LM6, LM24, LM25, LM27, A360, A380, A383 and A413)
  • Zinc (ZA3, ZA5, AC43A, AG40A, AC41A, AG40B)
  • Copper and magnesium alloys

Low-cost die cast tooling

One of the barriers to choosing die casting is the initial high cost of tooling. However, the cost of tooling in China is far lower than in Western Europe, and is in fact where most Western European die casting suppliers source their tooling from.

As part of ChinaTech Sourcing’s comprehensive service we manage the supply of high quality tooling directly in China, thus reducing initial investment and tooling lead times with fast turnaround for any product changes or die improvements. We also offer technical advice and support for your design engineers to ensure the part is feasible for the die casting process.

The major saving gained by sourcing offshore parts is the labour and therefore labour-intensive secondary operations. As well as casting capabilities, our suppliers also have CNC machining and finishing facilities. It is always more economical to add maximum value to the component by sourcing castings as close to the finished part as possible. This also eliminates any potential issues on delivery with porosity and leak testing.


Prior to production supply all die castings are initially supplied as PPAP (Production Part Approval Process) samples along with necessary ISIR (Initial Sample Inspection Reports) and material composition reports. Ongoing production will be controlled with appropriate process documentation, control plans and quality sampling via the inspection laboratories. For your further peace of mind, all deliveries are supplied with relevant chemical composition certificates and/or reports.

Aluminium die casting
Aluminium die casting
Die casting with silicone seal
Machined and painted aluminium die casting