61894000 - Bonarc E7018-1 Low Hydrogen Welding Rods 4.0mm

Smooth Running Rods for Heavy Fabrication

If you are looking for a rod that runs smooth, lays down flat, and passes X-ray every time, the Bonarc 7018-1 in 4.0mm is a solid contender for your stinger. Known among seasoned welders for its "buttery" arc, this rod takes the frustration out of stick welding. The "-1" at the end of the classification isn't just a number; it means this rod is built tougher than your standard 7018, designed to hold up in freezing conditions without cracking. For you, that translates to a puddle that wets out beautifully at the toes and a slag that often curls up and peels off on its own as it cools.

The 4.0mm (5/32") size is the workhorse for heavy plate. It carries enough heat to dig in and get good fusion but is manageable enough to run vertical-up without fighting a sagging puddle, provided you've got your amperage dialed in correctly (usually around 140-190 amps depending on your machine and position). The iron powder in the flux gives you a high deposition rate, meaning you spend more time welding and less time changing rods compared to non-iron powder alternatives. It strikes easily—and more importantly, re-strikes reliably—so you aren't pecking at the plate like a chicken trying to get the arc established.

Whether you are repairing heavy equipment, welding structural beams, or working on pipe supports, this rod gives you the confidence that the weld underneath the slag is sound. It handles gaps reasonably well and produces a bead profile that makes you look like a pro. Just remember to keep them in your rod oven; like any 7018, they run best and strongest when they are hot and dry.

Why Welders Like It

• Easy Slag Removal: Spend less time chipping and more time burning.
• Smooth Arc: Minimal spatter and a quiet, steady hiss.
• All-Position Capable: Runs vertical up with excellent shelf control.
• Forgiving: Handles minor surface contaminants better than some competitors.