Molybdenum
The main use of Molybdenum is in the commercial and industrial industries where it plays a large role in manufacturing. Due to its relative strength and heat resistance it is also used by both the military and in space exploration.
We are buyers and suppliers of Pure Mo/ Mo airmelt/Super alloys containing Mo.
Nickel-molybdenum alloys offer high chemical resistance to strong acids and other reducers such as hydrochloric acid, hydrogen chloride, sulfuric acid, and phosphoric acid. The chemical makeup for an alloy of this type, such as Alloy B-2®, has a concentration of molybdenum of 29-30% and a nickel concentration of between 66-74%. Applications include pumps and valves, gaskets, pressure vessels, heat exchangers, and piping products.
These are characterised by their high resistance to corrosion at both normal and high temperatures (resistance to scaling), good high-temperature strength and high electrical resistance. There are three main groups of alloys:
- Ni-Cr (and also Ni-Cr-Fe) alloys with high electrical resistance for heating elements, such as 70-30 (UNS N06008) and C-Grade (UNS N06004)
- Ni-Cr alloys (with Fe and other alloying elements) with good corrosion resistance. The best-known are Alloy 600 (UNS N06600) and Alloy 601 (UNS N06601)
- Ni-Cr alloys with high-temperature strength and creep resistance, mostly age-hardenable, such as Alloy X-750 (UNS N07750)
These are highly corrosion-resistant, of which Alloy C-276 (N10276) is the best-known. They offer exceptional resistance to reducing acids such as hydrochloric and sulphuric. There are a number of variants based on this composition, which have modified the Cr and Mo levels and, in some cases, added Cu or W in order to extend the corrosion resistance to conditions that are more oxidising or more reducing. These include Alloy C-22 (N06022), Alloy 59 (N08059), Alloy C-2000 (UNS N06200), and Alloy 686 (N06686).
Nickel molybdenum alloys have excellent corrosion and oxidation resistance at high temperatures. They also maintain their mechanical properties at elevated temperatures. A common nickel-molybdenum alloy is also known as Hastelloy®. This nickel alloy is often used for heat exchangers, pumps, and reactor pressure vessels.
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