Gr. 1

The high percentage of carbides gives the alloy higher wear resistance accompanied by reductions in the impact and corrosion resistance. The higher hardness also means a greater tendency to check during cooling. The checking tendency may be minimized by closely monitoring preheating, interpass temperature, and postheating techniques. While the cobalt-chromium deposits soften somewhat at elevated temperatures, they normally are considered immune to tempering. Weld metal deposited by ERCoCr-C electrodes and rods is used to build-up items such as mixers, rotors, or wherever harsh abrasion and low impact are encountered. Suitable also for applications such as pump sleeves, rotary seal rings, wear pads, expeller screws and bearing sleeves. The addition of tungsten enhances high temperature hardness and matrix toughness for excellent adhesive and solid particle erosion wear resistance. It retains its hardness, 43–58 HRC, at temperatures up to 760°C. Preheat at 300°C and over in general.

Cobalt alloy for hardfacing with excellent corrosion and abrasion resistance with low impact.

Primary hypereutectic carbides (approximately 19%) are found in in an austenitic type matrix.

It bonds well with all steels including stainless.

Ensure thorough cleaning of both the joint surface and its adjacent area prior to welding, diligently removing any contaminants such as grease, oil, crayon marks, sulfur compounds, and other foreign matter. Exercise caution to avoid any contact between the joint area and copper or copper-bearing materials. While it is preferable, albeit not mandatory, for the alloy to be in a solution-annealed condition during welding, preheating is typically deemed unnecessary as long as the base metal temperature remains above 0°C. Throughout the welding process, maintain consistently low interpass temperatures for optimal results. For further enhancement, it is advisable to implement postheating at 600°C and facilitate a slow cooling process after welding to effectively prevent the occurrence of cracking.