KP1962-1B1 - Lincoln Electric Severe Duty Subarc Contact Tip 1/8" (10-Pack)

High-Performance Metallurgy for Submerged Arc Welding

The Lincoln Electric KP1962-1B1 Severe Duty Contact Tip represents a critical component in high-amperage Submerged Arc Welding (SAW) systems. Engineered specifically for the rigorous demands of heavy fabrication, this contact tip is manufactured from a premium Beryllium-Copper alloy. Unlike standard Electrolytic Tough Pitch (ETP) copper or Chromium-Zirconium alternatives, Beryllium-Copper offers a superior balance of electrical conductivity and mechanical hardness. This metallurgical advantage is essential in submerged arc applications where the contact tip is subjected to continuous high currents ranging from 600 to 1200 Amperes, as well as the abrasive friction of 1/8-inch (3.2 mm) wire feeding at substantial speeds.

The "Severe Duty" designation of the KP1962-1B1 indicates its capability to withstand the extreme thermal environments inherent to SAW processes. In these applications, radiant heat from the arc and resistive heating within the tip can lead to softening and deformation in lesser materials. The Beryllium-Copper alloy maintains its structural integrity at elevated temperatures, resisting the "keyholing" effect—where the bore becomes oval-shaped—which degrades electrical transfer and leads to unstable arcs. By maintaining a precise bore geometry over a longer service life, this contact tip ensures consistent current transfer, optimal arc stability, and uniform bead profiles, which are critical for meeting the stringent quality codes often associated with structural steel, pipe mill, and pressure vessel fabrication.

Designed for seamless integration, the KP1962-1B1 is engineered to fit Lincoln Electric's K231-1 and K231-2 Submerged Arc Torches. These water-cooled torches rely on the high thermal transfer capabilities of the contact tip to dissipate heat effectively. The precision machining of the threads and mating surfaces ensures a low-resistance connection with the torch body, preventing micro-arcing at the interface that could damage the torch assembly. Supplied in a package of 10, these tips provide industrial users with a reliable supply of consumables necessary for maintaining high duty cycles in automated and semi-automated welding environments.