Sodium Donut System™ / Pressed Flux Tablets

$8.00 Buy It Now 12d 0h, $11.00 Shipping, eBay Money Back Guarantee

Seller: smallfoundrysupply (105) 100%, Location: Granite City, Illinois, Ships to: US & many other countries, Item: 250663683458 Sodium Donut System™ USE AT YOUR OWN RISK! Please note that metal casting is extremely dangerous activity. By purchasing anything from Small Foundry Supply you agree that Small Foundry Supply, its owners or subsidiaries and employees cannot and will not be held responsible for any damages or injuries due to proper or improper use of our products or any products we sell. USE AT YOUR OWN RISK! Never add moist, wet or damp flux to molten metal. Adding damp flux will cause steam explosions resulting in severe injury or death. Handle with care - Keep away from children and pets -Keep flux dry and sealed in containers marked as poison!!! These pressed flux tablets with center holes are mounted on the shaft of a thermocouple protection tube and immersed in the alloy. The tablets float up against a taper in the shaft, and thus remain immersed in the metal, continually modifying the alloy. This system is best suited for the dip-out well of a reverb furnace where the level of metal is relatively steady. Different formulations are suited for different temperatures and metal turnover rates. This product requires a two-month lead time and confirmation prior to order. Ebay only has a 30 delivery time as the maximum we can select, but we cannot provide this item faster than 60 without significant price increase. SODIUM MODIFYING FLUXES For hypoeutectic alloys containing silicon, addition of sodium or strontium results in a modified silicon structure that brings about improvement in mechanical properties (tensile strength or elongation) and castability. Sodium is a somewhat better modifier than strontium, but more difficult to handle because the sodium is volatile and the effect fades after 45 minutes, and traditional direct addition of sodium metal is highly reactive and environmentally problematic. In modified alloys casting shrinkage during solidification is dispersed instead of localized in large cavities. Modification is also very effective in the prevention of shrinkage porosity. Powder and tablet type fluxes are available. These fluxes are all much more environmentally friendly than sodium metal. A recently developed type (the Sodium DonutTM System) handles the problem of fading, which due to sodium volatility was at one time an inevitable aspect of modifying with sodium. Quantity 1 Lbs. for $8.00 If you need large quantities, please contact us through Ebay so that we can set up a specially priced Buy It Now auction just for you! Please note that the photo is a representation of products we offer. Condition: New

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