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g. Aluminum Casting Foundry Degas Tablets, 10 Each 1.75 Oz
g. Aluminum Casting Foundry Degas Tablets, 10 Each 1.75 Oz
 
Our Price: $35.00


Product Code: 2011-010
Qty:

Description
 

-LOW SMOKE-

- KEEP OUT OF REACH OF CHILDREN -


Description:

BCS Aluminum Degas Tablets are a professional grade, low smoke, degassing tablet for use in aluminum casting. They are manufactured by the Asbury Fluxmaster of Utah Co. and sold under the trade name of Asbury #752(tm) to the foundry industry. This material works to effectively remove hydrogen gas while fluxing suspended oxides and other impurities from the melt. It is designed to release a greater number of smaller gas bubbles over a longer period to give the most efficient cleaning with a minimum of smoke and fumes.


What It Does:

Molten metal can have gas dissolved in it that can cause problems. This gas is usually hydrogen. Dissolved gas can cause surface imperfections when the gas comes out of solution (bubbles) into the sand. It can also lead to serious metallurgical defects caused by hydrogen embrittlement and internal porosoity.

Degasser combines with hydrogen in solution in the molten metal, and drives it out of the melt.


How To Use It:

Only a small quantity is needed (see chart below). Dosage required will depend on gas conditions of the metal, but typically 1.75 ounces will handle 100 lbs of metal. These tablets will need to be ground or divided up for use in smaller amounts.

The degasser should be plunged to the bottom of the melt and allowed to bubble up thru the molten metal for best results. The material can also be stirred into the melt with a carbon stirring rod or other appropriate tool, although this is not as effective as plunging. Here's a link to a good YouTube video by "MyFordBoy" describing the process and how to make a plunger: https://youtu.be/8fpzNK3d0rs

For small batch use the following amounts are recommended:

Crucible Size

Pounds Aluminum

Degasser

#2

2 lb.

1/4 tsp.

#4

4 lb.

1/2 tsp.

#6

6 lb.

3/4 tsp. .

#8

8 lb.

3/4 tsp.

#10

10 lb.

1 tsp.

#16

16 lb.

2 tsp.

Note:

  1. tsp. = teaspoon.
  2. Above small batch amounts have produced good results when using clean scrap aluminum.