For many years, metallurgists have used various means to combine the properties of steel and aluminum to achieve an alloy with the properties of each. The petroleum refining industry has been aware of the benefits of an iron-aluminum system and, historically, has used the unique combination of properties to good advantage. These properties include provision of an excellent resistance to the harmful effects of elevated temperatures, particularly in some highly corrosive environments--and this, without sacrificing the mechanical properties of the steel.

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