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Common Alloys in Alloy Steels
Alloying elements are added to alloy steel castings to achieve certain properties of the material. As a guideline, alloying elements are added in low percentages (less than 5%) to increase strength or hardenability, or in larger percentages (over 5%) for special properties such as corrosion resistance or extreme temperature stability sex. Manganese, silicon or aluminum are added to remove dissolved oxygen, sulfur and phosphorus from the melt during the steelmaking process.
The following are alloy steel casting properties: strength, hardness, toughness, wear resistance, corrosion resistance, hardenability and hot hardness. To achieve some of these improved properties, the metal may require heat treatment.
Some of these can be used in exotic and demanding applications such as turbine blades for jet engines, spacecraft and nuclear reactors. Due to the ferromagnetic properties of iron, some steel alloys find important applications where their response to magnetism is important, including in electric motors and transformers. The uses and applications of alloy steel castings span a wide variety of industries and casting types.
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