ER4943/4043A Aluminum TIG RODNexal Aluminum ER4943 4043A Premium TIG Rod Nexalloy 4043A 4943 is an alternative to the 4043 alloy, offering 25% higher Ultimate Tensile Strength (UTS) and 50% higher yield strength in the as welded condition. Like 4043, it provides moderate to high strength (typically 35 ksi), a low melting point, and high fluidity. However, it also has lower ductility, formability, and toughness, along with moderate electrical and thermal conductivity. 4043A 4943