DesofinTM

	Desofin Grain Refiner For Brass Additional Information

Product Form:

DesofinTM was normally sold in capsules of 25 or 50 grams, new one is 60 grams.

Custom capsule weights are also available. Our new formula is much cheaper for you.

Consumption:

100 grams of DesofinTM are recommended now per metric ton of melted brass to be inoculated.

This equates to one 50 grams capsule for each 500 kg of melted brass. The new formula will
doubles grain refining so that one new 60 grams tube is sufficient for 500 kg refining.

Alloy Requirements:

Best casting results will occur with clean yellow brass ingot. The basic brass must be

free of inclusions which are identified by a visual check of the polished surface. Good
grain refinement usually occurs when the copper contents is between 57 and 63 percent.

Optimal grain refinement usually occurs when the copper content is 59.5 percent the

aluminum content is 0.6 percent.

DesofinTM has been used to lower the casting temperatures and increase the castability

and fluidity of the aluminum bronze, red brass and tin bronze, however it will not produce
grain refinement in these materials.

Methods of Use:

Additional information on alloys

As a safety precaution, care should be taken to preheat the Desofin capsules on the

furnace rim, shelf, etc. so they are free of any moisture.

Any adjustments to the aluminum or zinc content of the melt should be made prior to

adding DesofinTM . The surface of the melt should be reasonably free of slag.

DesofinTM should be added to the melt by immersing the capsules atleast 100 cm. below the

liquid metal surface using a bell shaped plunger and the furnace should be in low tap.

Expected Benefits:

Depending on the alloy composition, the use of DesofinTM can result in the following casting benefits:

Improved Fluidity of the metal to be cast. One new tube can revive the fluidity of five metric tons of brass when desired
Lower the casting Temperatures are possible depending on the size of the part to be cast and the type of mold to be used. Generally
between 940 and 980 degrees C for beryllium copper molds.
Lower temperatures are possible if the iron steel molds are used.
Cracking Tendencies of the parts to be cast are greatly reduced and most often, cracks

are eliminated.

The occurrence of the sinks is greatly reduced.
Lead is more uniformly distributed in the fine grain structure.
There are no halogen gases evolved with the new formula now.

Potential Savings:

Using DesofinTM can result in the following savings:

Savings over the cost of purchasing fine grained ingot.
Reduction of casting scrap.
Reduction in finishing and rework costs.
Energy savings resulting from lower casting temperatures.
It is not necessary to refine foundry scrap, i.e. gates, risers and turnings already grain refined.