What's the model of lap welding for two grade steel bars?
You should first look at what is the project of the Ministry of communications and the Ministry of water resources, the other I know better, the Ministry of construction and the Ministry of Railways is not clear, each industry standard is not the same, so you have to figure out is what industry.If it is the Ministry of communications project, two steel bar can use E43 electrode, but the Ministry of water resources can not, need to use E50. These are found on the corresponding construction codes for reinforced concrete
Two grade steel lap welding electrode should be in line with the current national standard "carbon steel welding rod" GB/T 5117 E4303
One or two grade steel is HRB335, 335Mpa. if used does not require structural strength or do not require strength and yield strength, can be used J42 electrode. Otherwise, using J50 electrode. Welding for steel structure, general requirements for the strength of weld metal and base metal electrode. According to the strength of the steel structure. Choose the corresponding strength.Two, two simple introduction of steel bar:That is the new standard name for HRB335 steel, two steel for the old, as a kind of hot rolled ribbed bar. Thread steel in the construction industry, the second class of rebar and grade III thread steel is called in the past, the new standard, the second class of rebar is called HRB335, and the third class of rebar is called HRB400. Widely used in housing, bridges, roads and other civil engineering construction.
