is an alloy containing copper, cadmium and tin with an electrical conductivity 30% of copper. It is known for applications at elevated temperatures and is readily machined. It is more difficult to machine in any of its heat treated conditions and use of oil base lubrication is common for all machining operations using this material. Heat input adversely affects the corrosion resistance of this alloy. 2221 aluminum is strengthened by an aging heat treatment or by controlled cold working from the solution annealed condition.
6061 Aluminum is probably the most common heat treatable aluminum alloy. 6061 is an aluminum alloy in which magnesium and silicon are the alloying elements. It has good mechanical properties, is heat treatable and weldable. It can be produced in several heat temper grades such as 6061-O, 6061-T4, 6061-T6, 6061-T651, 6061-T42 and recommended for the manufacture of applications requiring high corrosion resistance.
7075 Aluminum uses zinc in its alloying process. It has good fatigue strength and average machinability. The material's electrical conductivity is significantly lower than copper. Its higher cost limits its use to more specific applications where cheaper alloys are not suitable.
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