EDCoCr-B-03 rather: AWS ECoCr-B JIS DF-CoCrB 
 Description: cobalt chromium tungsten alloy cobalt-based hardfacing welding rod core, the use of DCRP, deposited metal work at 650 ℃ can maintain good wear resistance and corrosion resistance. 
 Application: high temperature and pressure valves, high pressure pump shaft sleeve and inner sleeve and the blade cut fiber port and other equipment. Surfacing hardness HRC: ≥ 44 

 D822 cobalt-based electrodes 
 Model: GB / T EDCoCr-C-03 rather: AWS ECoCr-C JIS DF-CoCrC 
 Description: The high-carbon cobalt-chromium alloy welded tungsten welding electrode core cobalt-based, using DC reverse, slag coverage is good, beautiful appearance, with excellent wear resistance, heat resistance, corrosion resistance, high temperature at 650 ℃ can be maintained these characteristics. 
 Uses: cone bit bearing, rotating impeller boilers, mill edge, wear parts such as screw feeder surfacing. 
 Surfacing hardness HRC: ≥ 53