waved steel fiber Confirmed by EN 14889,ASTM A820, Diameter: 0.2-1.2mm Length: 15-90mm Tensile strength: 800-2300MPa Steel fibers is a new type of construction materialMixed with steel fiber concrete cement will apparently have all kinds of functions, such as decreasing the thickness of concrete and shortening time of construction, saving cost, lengthening the service life, reducing the ...