Technical Data

Ultima™ 601 Welding I.D. Pipe


Our Ultima 601 induction hardened wear pipe is manufactured utilizing specialized thermal techniques that develop carbide hard inside diameters while maintaining ductile hardened outside diameters for toughness. Unregulated intense heat (from cutting, or welding operations) may “draw back” the hardness of the I.D., resulting in diminished resistance to abrasive wear. Please exercise all caution to minimize heat transferred to the inside of the diameter of the pipe. Confine welds to O.D. only.

Joint Prep: Remove all slag and discolored material after cutting, i.e. follow standard welding procedures for preparing clean smooth joints free of contaminants. Bring parts to contact, allow 3/16″ max. root opening. For spaces greater than 1/16″ increase leg of fillet weld by the amount of the opening.

Pre-Heat / Inter-pass Temperature: If any of the parts are colder than room temperature (70°F), preheat weld zone and 6″ of adjacent material to 100°F for sections heavier than 1″ thick cross-section call for guidelines. Do not exceed 450°F inter-pass temperature.

Electrodes: E7018 electrode, (1/8″, or 3.18mm). Smaller diameters may be used. Follow Standard Low Hydrogen Method. Utilize sound welding practices and only use experience welders familiar with welding pipe and related products.


Place welds to the outside of the pipe wall O.D. Avoid heat buildup on the I.D. Maintain smallest practical weld bead. The bead length should not exceed 5″ to 6″. Allow the pipe to cool before applying additional beads. Use stringer bead and avoid a weave pattern. Use multiple passes (5 to 6 passes) for 3/8″ filet welds – 10 to 12 passes for 1/2″ filet welds.


Caution: Induction hardened pipe contains retained internal stresses. Never cut this product lengthwise, as serious injury or property damage might result. Employ all standard guidelines appropriate to welding hardened alloy materials. Always use experienced welders.