... , sepiolite, white clay, pyrophyllite etc siliceous nonmetallic minerals are effectively used in E4303, E4313 welding rod, while they have not so smooth ... welding rod.Sericite Mica is a kind of flake shape aluminium potassium silicate, formula is KAl2[Si3AlO10](OH,F), the chemical ... . The mix percentage is 3% to 5% when it is used in E4303, E4313 etc acid welding rod, sericite mica can increase ...