Heat-resistant steel, low hydrogen electrode R507 DC metal chemical composition of sodium (%) Cr4.5-6.0Mo0.40-0.70 for pearlitic heat resistant steel welded Cr5Mo class. 400 ℃ high temperature, such as corrosion of the pipe out of hydrogen 
 Heat-resistant steel electrode R507B low hydrogen type DC welding Cr5Mo class pearlitic heat resistant steel, such as 400 degrees Celsius temperature hydrogen corrosion resistant pipes 
 R517 heat-resistant steel low hydrogen type electrode for welding current temperature of 650 degrees Celsius below 10Cr5MoWVTiB other pearlitic heat resistant steel, such as high temperature and high pressure boiler reheater, etc. 
 R707 heat-resistant steel welding electrode low hydrogen DC Cr9Mo heat pipes and other steel structures and superheater 
 R717 heat-resistant steel low hydrogen electrode for welding Cr9Mo DC superheater heat pipes and other steel structures and 
 R802 heat-resistant steel electrode with titanium calcium type DC welding temperature of 565 degrees Celsius below the heat-resistant steel Cr11MoV 
 R807 heat-resistant steel welding heat-resistant steel heat-resistant steel electrodes with low hydrogen electrode DC welding temperature below 565 degrees Celsius heat Cr11Mo steel, such as variable-level high-pressure gas turbine blades, etc. 
 R817 heat-resistant steel low hydrogen electrode DC Description: R817 is a low hydrogen sodium type coating Cr11MoNiVW heat-resistant steel electrodes. DCRP, the all-position welding. Welds should be based on structural features of the appropriate preheat and post weld heat treatment. 
 R827 heat-resisting steel electrodes with low hydrogen type DC welding temperature 565 degrees Celsius below the Cr11MoV, Cr11MoNiV thermal strength steel, such as superheater and steam pipeline, transmission-level high-pressure gas turbine blades, etc.