[Clouds Steel Works to recommend the star product - steel production] performance indicators 1, strength index strength of steel by the elastic limit σe, yield strength σy steel-concrete loft offer, and ultimate tensile σu, designed to yield strength of steel based steel-concrete loft, high yield strength steel structure can reduce the weight of the mixed attic price, save steel, reduce the cost. Σu tensile strength steel that is before damage can withstand maximum stress steel-concrete loft company, then the structure due to plastic deformation and lose a great performance, but the structure does not collapse deformation, meet the structural resistance when strong earthquake Claim. 'Σu / size σy value, can be considered parameters strength of steel reserves. [Clouds Steel Works to recommend the star product - steel production] 3, forming performance of cold-formed steel is a measure of the performance of the steel bent at room temperature process to produce plastic deformation resistance when cracks. Cold bending properties of the steel is subjected to cold-formed steel experiment to test the performance of a predetermined degree of bending of the bending deformation. Steel-concrete building attic attic _ _ Tianjin Steel Mixed clouds and clouds of steel from the Tianjin Steel Engineering Company. Tianjin clouds Steel Engineering Company (www.tjxygcfw.com) strong, credible, in Tianjin steel industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the clouds into the brilliant steel and you work for a better future!