What innovations is metal working did the sumerians introduce?

The Sumerians introduced several key innovations in metalworking, notably the use of bronze, an alloy of copper and tin, which enabled the creation of stronger and more durable tools and weapons. They developed advanced casting techniques, including the lost-wax method, which allowed for intricate designs and greater precision in metal objects. Additionally, the Sumerians were among the first to use metal for decorative purposes, producing jewelry and ceremonial items that showcased their craftsmanship and artistic expression.