Custom Online gravity casting Services

Gravity Casting (Primarily Metal Mold Casting)

Gravity casting relies on molten metal filling a steel mold under its own weight. After cooling, the mold is opened to remove the casting.

Core Features and Advantages:

1. High Density:

   • Natural solidification without external disturbances results in excellent mechanical properties.
   • Tensile strength improves by 10%-15%, making it ideal for load-bearing components like aluminum/zinc alloy wheels and engine cylinder heads.

2. Long Mold Lifespan:

   • Steel molds can be reused over 10,000 times, significantly reducing per-piece costs.
   • Suitable for medium-volume production of 10,000-100,000 units annually.

3. Fast Production:

   • Cooling rate is 3-5 times faster than sand casting, with production cycles reduced to 3-10 minutes per piece.

4. Superior Surface Quality:

   • Surface roughness: Ra 12.5-25μm.
   • Dimensional tolerance: ±0.3mm, reducing machining requirements by 30%.

Why buyers choose our gravity casting line. Most of what leaves this shop is aluminum gravity casting work, poured in our own 34,000 m² foundry in Pingdu, Qingdao — not through a broker. That matters when a mold needs adjusting mid-project: the tooling team sits on the same floor as the pouring line.

Every order passes three inspection gates: incoming material verification, in-process checks during pouring and cooling, and full dimensional inspection before packing. Critical parts are verified on a Nikon XT H 320 industrial CT scanner and Hexagon coordinate measuring machines, with alloy composition confirmed by spectrometer. You get the measured values, not just a pass stamp.

Lead time starts at 5 days for components once tooling is ready. Send a CAD file and you’ll get pricing plus free DFM feedback — we’ll flag wall-thickness and draft-angle problems before the mold is cut, not after.

Not sure gravity casting is the right process for your part? If you need thinner walls and tighter porosity control, low-pressure casting is usually the better fit. Larger iron or steel components at lower volumes belong in sand casting, and parts that need the finest detail reproduction go to investment casting. Most gravity castings still need finishing, and our in-house CNC and lathe machining handles that in the same facility.

We ship gravity castings to buyers in Germany, France, the United States, Spain, the Netherlands, South Africa, Mexico, Brazil, South Korea and Japan. Inspection records and material certificates travel with the parts — see our quality assurance process.