Funshowcase Foundry Clay Graphite Crucibles Cup Furnace Torch Melting Casting Refining Gold Silver Copper Brass Aluminum Glass 500ml Max for Aluminum 12kg Copper 35kg

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About Funshowcase Foundry Clay Graphite Crucibles Cup

Dimensions 100ml_ Max for Aluminum_300g Copper_800g dimensions_ diameter upper 78mm diameter bottom 65mm, height 75mm 500ml_Max for Aluminum_1200g Copper_3500g dimensions_ diameter upper 113mm diameter bottom 80mm, height 120mm 1000ml_Max for Aluminum_3000g Copper_8000g dimensions_diameter upper 150mm diameter bottom 100mm, height 175mm Material: Graphite Excellent thermal conductivity and corrosion resistance. 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. 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 Fahrenheit £¨400 Centigrade Degree). The withstand temperatures can be 3200 Fahrenheit( 1800 Centigrade Degree ) if you use Air Electric Furnace. The withstand temperatures can be 5000 Fahrenheit ( 2800 Centigrade Degree ) if you use Vacuum or Gas Protection Furnace.