Silicon metal is widely used in refractory material, powder metallurgy industry, it is a good antioxidant. To join in the refractory metal silicon can react with oxygen, first to form a new mine closed porosity, improve the density, prevent the penetratio
1. Small steel structure warehouse primary steel framing: steel column and beam,Q235B &Q345B painting or hot galvanized2. Roof Z purlin, Q235B hot galvanized3. Roof sheet: YX-750type, 0.45mm, single color steel sheet