Mesoamerican metallurgy shares similar characteristics. This article documents the blacksmith’s trade within a colonial and New Spanish context between the sixteenth and eighteenth centuries. It researches the evolution of Hispano-American metallurgy and its constructivist implications, which include: the manufacturing of armament for the conquest, the utensils made in the colonies, documenting inventories of tools, the creation of unions and their functional structures, and the transfer of the trade between Spaniards and Indians.