The disposition of a U.S. real property interest by a foreign person (the transferor) is subject to income tax withholding (IRC section 1445). The transferee is the withholding agent. If you are the transferee, you must find out if the transferor is a foreign person.
Looking directly at the crucible when magnesium first reacts with oxygen can damage your eyes. 5 years ago Magnesium metal is burned in air forming magnesium oxide.
These materials can withstand the highest temperatures in typical foundry work. Silicon carbide has the added advantage of being a very durable material. The A shaped crucibles are useful for metals up to 2000 Â°F (1093Â°C).