OTOOLWORLD 99.9% Pure Graphite Crucible Metal Melting Gold Silver Scrap Casting Ingot Mould (1kg Graphite Crucible)

OTOOLWORLD 99.9%Pure Graphite Crucible Metal Melting Gold Silver Scrap Casting Ingot Mould

• 99.9% Graphite. select the size you need, and there is a little measurement tolerance(0-0.3MM)
• Excellent thermal conductivity and corrosion resistance.
• Melting and casting metals such as Gold, Silver, Brass, Aluminum, Copper, Zinc, Plumbum, etc.
• 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.
• Keep in dry place, After drying the crucible, please avoid the water. Be careful not to give a mechanical impact force, not from a fall or impact.