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Molybdenum has several alloys. For the purpose of this brochure, only alloys that are predominantly molybdenum will be considered.
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Molybdenum has several alloys. For the purpose of this brochure, only alloys that are predominantly molybdenum will be considered.
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Molybdenum’s prime alloy is TZM. This alloy contains 99.2% min. to 99.5% max. of Mo, 0.50% Ti and 0.08% Zr with a trace of C for carbide formations. TZM offers twice the strength of pure moly at temperatures over 1300’C. The recrystallization temperature of TZM is approximately 250’C higher than moly and it offers better weldability.
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Materials and description, Crucibles and their covers are made of high temperature-resistant materials, usually porcelain, alumina or an inert metal. One of the earliest uses of platinum was to make crucibles. Ceramics such as alumina, zirconia, and especially magnesia will tolerate the highest temperatures. More recently, metals such as nickel and zirconium have been used. The lids are typically loose-fitting to allow gases to escape during heating of a sample inside.