The main differences between aluminum 1060 and aluminum 1010 for aluminum sheet metal fabrication, or for prototype stamping process are:

Purity:
Aluminum 1060 has a higher purity of 99.6% or more, making it more suitable for applications requiring excellent electrical and thermal conductivity.
Aluminum 1010 has a lower purity of 99.0% or more, with slightly more impurities present.

Mechanical Properties:
Aluminum 1060 has lower tensile strength and hardness compared to 1010, making it more suitable for applications where ductility and formability are important.
Aluminum 1010 has higher tensile strength and hardness, making it better suited for applications requiring more structural integrity and resistance to deformation.

Formability:
Aluminum 1060 is more formable and can be bent, rolled, or drawn more easily than 1010.
Aluminum 1010 is less formable and may require more specialized fabrication techniques, such as annealing, to achieve complex shapes.

Cost:
Aluminum 1060 is generally more expensive than 1010 due to its higher purity.
Aluminum 1010 is a more economical choice for applications that do not require the higher purity of 1060.

Applications:
Aluminum 1060 is commonly used for electrical components, heat exchangers, and decorative applications where high conductivity and formability are important.
Aluminum 1010 is often used for structural components, architectural applications, and general fabrication where higher strength and hardness are required.

In summary, the choice between aluminum 1060 and 1010 for sheet metal fabrication depends on the specific requirements of the application, such as electrical/thermal conductivity, mechanical properties, formability, and cost considerations.