In use, it is required to have good weldability, plastic deformation performance and certain mechanical strength. Channel steel Channel steel is a long strip of steel with groove section, which belongs to carbon structural steel for construction and machinery.Channel...
Naming: N is the first pinyin letter of the two Chinese characters "Nai" and "Mo", while 400 represents the average Brinell hardness of this steel plate. 2, NM450 Function and Performance: Function: It mainly provides protection in situations or parts...
after cold forming, annealing in non oxidizing medium protective gas 3. BK(+C) the final heat treatment after cold forming, threfore small steel pipe plasticly, the plasticly degree does not guarantee Standard specifications and steel grades of precision tubes can be ...