Graphite Ingot Mold Refining Melting Casting Mould for Gold Silver

Composition: 99.95% Graphite. Ash content less than 0.1%. Excellent thermal conductivity and corrosion resistance. Better for Refining than Silicon Carbide Graphite Crucibles. Well corrosion resistance to strong acid and alkali / Good thermal conductivity properties which highly shorten the melting time and save energy / Great impact resistance performance to 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 °F (400℃). They withstand temperatures can be 3200 °F if you use Electric Furnace. They withstand temperatures can be 5000 °F if you use Vacuum or Gas Protection Furnace. Application Melting and casting metals such as Gold Silver Brass Aluminum Copper Zinc Plumbum etc. size:Inner size 105x35x20mm 125x50x30mm Material:graphite colour:Black Package Contents: 1 x Graphite Casting Melting Ingot Only the above package content other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.