Graphite Casting Ingot Mold Coin Combo Metal Casting Refining Scrap Bar for Melting Casting Refining Metal Jewelry Gold Feature: Composition: 99.95% Graphite, Ash content less than 0.1%. Excellent thermal conductivity and corrosion resistance. Better for Refining than Silicon Carbide Graphite Crucibles. 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). The withstand temperatures can be 3200 F if you use Air Electric Furnace. The withstand temperatures can be 5000 F if you use Vacuum or Gas Protection Furnace. Perfect Performance Excellent thermal stability for fast heating and cooling; 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 ensure the reliability of product quality. ApplicationUsed for melting and casting metals such as Gold, Silver, Brass, Aluminum, Copper, Zinc, Plumbum, etc Specifications: Material: Pure Graphite Ash 0.1% Bulk density 1.82 g/cm3 (1 troy ounce =31.1035g) Color:Black Shape:A/B(Optional) Size: More detailed,please see photo Quantity:1Pc. Note: Size for manual measurement, there may be a 0 to 3mm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package include: 1x Graphite Casting Melting Ingot.