The Lincoln 7018AC 1/8 in. Stick Electrode 5 lb. is ideal for joining most hard-to-weld steels. This mild-steel, low-hydrogen electrode has a powdered-iron coating and can be used in steel structures, field erection, plants and rigs. Compatible with high-sulfur steels, low-alloy steels that can harden, high-tensile steels, medium and high carbon steels, cold-rolled steels and free-machining steels.