D802 cobalt-based alloy electrodes standards in line with GB EDCoCr-A-03 rather AWS ECoCr-A D802 cobalt-based alloy electrode Description: cobalt-chromium tungsten alloy core of cobalt-based welding electrodes, DC reverse, deposited metal work at 650 ℃ still maintain a good wear resistance and corrosion resistance. Purpose: to work for about 650 ℃ can maintain good wear resistance and corrosion resistance of the occasion, or to withstand shocks and hot and cold cross the site, such as welding temperature and pressure valves and thermal cutting edge and so on. D802 cobalt-based alloy electrode deposited metal chemical composition /% C 0.7-1.44 Si≤2 Mn≤2 Cr 25-32 Fe≤4 W 3-6 other ≤4 the balance of Co D802 cobalt-based alloy electrode surfacing hardness HRC: ≥40 above chemical composition and hardness at room temperature refers to three or more surfacing welding metal. D802 cobalt-based alloy electrode reference current: AC or DC D802 cobalt-based alloy electrode wire diameter (mm) 3.2 4.0 5.0 D802 cobalt-based alloy electrode welding current (A) 90 ~ 130 140 ~ 170 170 ~ 200 D802 cobalt-based alloy electrode Caution : 1. 150 ℃ before welding electrodes shall be baked for one hour. 2. In order to avoid cracks, according to the workpiece size and the type of the base material shall be preheated 200 ~ 400 ℃ of. And should be low current short-arc welding. After welding the workpiece should be immediately placed in the drying and preheating of sand or kelp in the slow cooling cylinder. 3. Since arc welding temperatures relatively high, so the dilution rate is relatively large welding, it is generally difficult if only in order to improve the welding or arc welding efficiency considerations were.