Funshowcase Rectangle Jewelry Casting Graphite Ingot Mold Crucible for Melting Refining Scrap Precious Metal 135x42x32mm
$16.99
Description
Graphite casting melting ingot, jewelry casting molds.Melting and casting metals such as gold, silver, brass, aluminum, copper, zinc, plumbum, etc..Excellent thermal conductivity and corrosion resistance.Well corrosion resistance to strong acid and alkali. Great impact resistance performance to ensure the reliability of product quality.Warm-Tips: Pure graphite crucible can not be heating by carbon furnace or charcoal kiln. It will be oxidized and cracked; Pure graphite will start to oxidize at 752℉ (400℃). The withstand temperatures can be 3200℉ ( 1800℃ ) if you use Air Electric Furnace. The withstand temperatures can be 5000℉ ( 2800℃ ) if you use Vacuum or Gas Protection Furnace
