Silicon Nitride Riser Tubes
SF-Foundry supplies silicon nitride riser tubes designed for low-pressure casting of aluminum alloys, especially for efficient and automated production of automotive parts. It has core advantages such as high temperature resistance, corrosion resistance, and long life, which can significantly improve casting efficiency and product yield.

Application Scenarios
Working principle:
The lower end is inserted into the aluminum liquid insulation furnace, and the upper end is connected to the mold. The aluminum liquid is hydraulically pressed into the mold cavity by air pressure to complete the casting.
Main fields:
Low-pressure casting of aluminum alloys such as automobile wheels and motorcycle parts to achieve automated die casting production.
Why choose SF-Foundry Silicon Nitride Riser Tube?
SF-Foundry silicon nitride (Si₃N₄) riser tubes have become an important tool for conveying molten aluminum metal during low-pressure casting and process, relying on their excellent high temperature resistance, thermal shock resistance, and corrosion resistance, helping customers reduce downtime, reduce maintenance costs, and improve casting yield.
- Excellent high temperature resistance: Long-term resistance to 700℃ aluminum liquid corrosion, strong thermal stability, adapt to rapid temperature changes, withstand frequent hot and cold shocks, low thermal expansion coefficient, reduce the risk of thermal stress cracking
- Super strong corrosion resistance: Silicon nitride (Si₃N₄) has extremely strong chemical stability, does not react with molten aluminum, can resist the erosion of molten aluminum metal, avoid metal liquid pollution, and extend service life
- Optimized mechanical properties: High bending strength, can withstand the impact and pressure of metal liquid, and avoid damage caused by mechanical stress.
- Improved economy: No need for frequent replacement, reduced downtime, long service life.


Why trust SF-Foundry?
🔹 Using high-purity silicon nitride powder, isostatic pressing and precision sintering to ensure product consistency.
🔹 Professional technical support: Provide installation guidance, preheating solutions and after-sales support to help customers maximize product performance.
🔹 Customized service: Provide a variety of specifications (diameter, length, bending angle), adapt to different types of die-casting machines and casting equipment, support special coatings or structural optimization, and adapt to higher-demand application scenarios.
Choose SEFU silicon nitride riser tube to make your aluminum alloy casting production more efficient and stable!