3M™ Silicon Nitride Riser Tubes offer exceptional service lifetime in low-pressure aluminum casting applications.
3M™ Silicon Nitride Riser Tubes feature a unique microstructure that provides very high mechanical strength, thermal shock resistance and gas-tight properties. They are made of 3M™ Silicon Nitride, an advanced ceramic material that is extremely wear resistant, chemically inert and not wetted by aluminum. It resists buildup of dross and can be used in melts containing sodium and strontium.
3M silicon nitride riser tubes have an extremely long service life of up to one year or more, compared to an average lifetime of 6 weeks for silicon carbide or 12 weeks for aluminum titanate. This extended service life translates to longer intervals between cleaning and less production downtime for tube removal and replacement.