Complex sentence: By the 9th century in Europe, the blast furnace became available and with it the ability to create homogenous high carbon steel-the need for pattern welding all but died out for other than cosmetic applications.
Split into simpler sentences: By the 9th century in Europe, the blast furnace became available and with it the ability to create homogenous high carbon steel. The need for pattern welding all but died out for other than cosmetic applications.