US President recently decided to invoke a Cold War-era defense law to encourage domestic Inconel 625.
What is Inconel 625?
Inconel 625 alloy is a non-magnetic, corrosion and oxidation resistant
nickel-chromium alloy. The high strength of Inconel 625 is due to the hardened
combination of molybdenum and niobium on the nickel-chromium matrix of the
Inconel 625 is extremely resistant to a variety of unusually severe corrosive
environments, including high temperature effects such as oxidation and
carburization, including corrosion. Its outstanding strength and toughness at
high temperatures ranging from low temperatures to up to 2000°F (1093°C) are
primarily due to the solid solution of the refractory metals Co and Mo in a
Nichrome 625 has excellent resistance to pitting and crevice corrosion, high
corrosion fatigue strength, high tensile strength, and resistance to stress
corrosion cracking against chloride ions - making it an excellent choice for
seawater applications. Inconel is used in aerospace applications as well as
marine applications. Common applications for this alloy are springs, seals,
bellows for submersible controls, cable connectors, fasteners, flexures, and
oceanographic instrument components.
Physical Properties of Inconel 625
Density: 0.305 lbs/in3, 8.44 g/cm3 Average Coefficient of Thermal Expansion:
68 -400°F (20 -204°C): 7.3 x 10 6 (13.1) 68 -600°F (20 -315°C): 7.5 x 10 6
68-800°F (20- 427°C): 7.7 x 10 6 (13.9)
Permeability H = 200Osted Annealed: 1.0006 Modulus of Elasticity: ksi (MPa)
in Tensile 30.2 X 103 (208 X 103) Melting Range: 2350 -2460°F (1290 -1350°C)
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Southern Copper Corp (SCCO.N) recently said its Peruvian mine remained closed after a six-week standoff with protesters and blamed the Peruvian government for failing to intervene in the safety of its 1,300 workers and their families.
The company said in a statement that a recent agreement to end protests at the Cuajone mine required the company to withdraw complaints against protest leaders because railways transporting minerals and supplies remained blocked. Production has been suspended since the end of February.
Peru's Energy Ministry said in a separate statement that it had also reached an agreement with Southern Copper to start talks to find common ground with local communities.
"If we shut down for a year, the government will stop receiving more than 3.1 billion soles ($830 million) in taxes and royalties, and 8,000 direct and indirect jobs will be lost. This is what we want to avoid, "Southern Copper added in the statement.
Peru has faced a wave of protests from indigenous communities, who accuse mining companies of not providing enough jobs and funding to poor local residents.
Central bank officials said last week that protests against copper mines such as MMG's Las Bambas and Southern Copper's Cuajone were dragging down the economy.
Peru is the world's second-largest copper producer and mining is an important source of tax revenue for the country. It is estimated that the supply and prices of the Inconel 625 will be influenced by that.