Graphite Ingot Mold, Melting Casting Mould, Silver Ingot, for Gold Silver Aluminum Copper Brass Zinc Plumbum and Alloy Metals,(50x36x30mm-250g Gold; 136g Silver)

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• [Ingot Mold Size] For Outer size:50x36x30mm/19.7x14.2x11.8in; Inner:35x20x22mm/13.8x7.9x8.7in; Capacity: 250g Gold; 136g Silver; Melting and casting metals such as Gold, Silver, Brass, Aluminum, Copper, Zinc, Plumbum, etc. Graphite oil bath, ingot gold, silver, copper, aluminum, glass, etc., non-sticking and not bursting, high-purity, high-density, high-strength graphite, fine processing, fine and smooth surface without visible pores
• [Graphite Mold Composition:]99.95% Graphite. Ash content less than 0.1%. Excellent thermal conductivity and corrosion. Better for Refining than Silicon Carbide Graphite Crucibles.
• [Casting Mold, 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. They withstand temperatures can be 3200°F if you use Air Electric Furnace. They withstand temperatures can be 5000 °F if you use Vacuum or Gas Protection Furnace.
• [Metal Casting Molds Performance] Excellent thermal stability for fast heating and cooling, Good thermal conductivity properties which highly shortens the melting time and saves energy / Great impact performance to ensure the reliability of product quality.