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【Size】Capacity: 4KG gold; Height:130mm; Inner diameter:60mm; Top diameter:85mm; Bottom diameter:75mm
【Composition:】99.9% Graphite. Ash content less than 0.1%. Excellent thermal conductivity and corrosion resistance. Better for Refining than Silicon Carbide Graphite Crucibles.
【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.
【Application】Melting and casting metals such as Gold, Silver, Brass, Aluminum, Copper, Zinc, Plumbum, etc.
【Attention】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.
Eforlife -- Pure graphite crucible for metal melting and casting
*Important note: Pure graphite crucible can NOT be heating by Carbon furnace or charcoal kiln. It will be oxidized and cracked.
Composition: Graphite ≥ 99.9%; Ash≤0.1% (protect the precious metals from contamination while smelting) Capacity:1kg/2kg/3kg/4kg/5kg Gold.
●Well thermal stability : Capable of fast heating and cooling according to the using conditions of graphite crucible. ●Excellent corrosion resistance, impact resistance, acid resistance and alkali resistance. ●Great heat transfer performance: highly shorten the melting time and save energy. ●Small thermal expansion coefficient in high-temperature using process and certain strain resistance to the thermal shock, quenching. ●Graphite Crucible is Generally used in alloy tool steel smelting and smelting of nonferrous metals and their alloys. ●Graphite is more durable than ordinary material products, which makes graphite crucible to have long service life under correct using condition.
Stored in dry place, do not get it wet. After drying the crucible, please avoid the water. Be careful not to give a mechanical impact force, not from a fall or impact.
On the first use, the foundry was just hot enough to smelt aluminum cans, the crucible warped noticeably. On the third use, also while smelting aluminum, the side melted after the first full pour.
I've used this crucible twice now and it is showing some wear and I think its my fault. The propane flame shoots right on the crucible which is causing it to deform on the one side. I did do a preheat up to full temp added some borax to coat the inside and then let it cool before melting anything in it. But for what it is and the price it does the job fine. The one complaint I have is a soda can doesn't fit through the opening which they do give the measurements so not really the fault of the company. Holds a good bit of aluminum and pours nicely. If you are looking to melt cans though i would choose a different style though.
great little Graphite Crucible smooth finish. Will do the little smelts where I wish to make 1 pound aluminum castings.
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