Weld Mold Co.’s new 5551 flux-cored wire withstands extreme heat conditions for welding applications by maintaining hardness retention in temperatures as high as 1,200 F. Weld Mold 5551 is suited for extreme welding applications because of its higher physical properties and operation in higher temperatures. The wire is highly resistant to heat checking in environments where coolants are used, extremely abrasion resistant and tolerant of compressive loads. Weld Mold 5551 offers high weldability for general welding applications.