Abstract: Provided is a steel sheet with excellent abrasion resistance as well as excellent low-temperature toughness and ductility of a base material while having a high strength of a tensile strength of 1,100 MPa or more. The steel sheet is a high-strength steel sheet having a tensile strength of 1,100 MPa or more, wherein the components in the steel satisfy a defined composition, A-value represented by a defined formula (1) is 0.0015 or less, while E-value represented by a defined formula (3) is 0.95 or more, and a Brinell hardness HBW (10/3000) in a position at a depth of 2 mm from a surface of the steel sheet is 360 or more and 440 or less.

Abstract: Provided is a steel sheet with excellent abrasion resistance as well as excellent low-temperature toughness and ductility of a base material while having a high strength of a tensile strength of 1,100 MPa or more. The steel sheet is a high-strength steel sheet having a tensile strength of 1,100 MPa or more, wherein the components in the steel satisfy a defined composition, A-value represented by a defined formula (1) is 0.0015 or less, while E-value represented by a defined formula (3) is 0.95 or more, and a Brinell hardness HBW (10/3000) in a position at a depth of 2 mm from a surface of the steel sheet is 360 or more and 440 or less.

Abstract: The object of the present invention is to provide a molded plastic article having high accuracy. To attain this object, the present invention provides a method of manufacturing a column or panel shaped molded plastic article having a desired molding shape on at least the circumference face of said molded plastic article comprising; manufacturing a column or panel shaped mother mold by using a material having high rigidity and heat resistance, the circumference face of said mother mold has a shape corresponding to the molded shape of the circumference face of said molded plastic article, manufacturing a cylindrical or ring shaped glass mold by the glass molding method, the inside face of which has a shape transferred from said shape of the circumference face of said mother mold, and molding a molded plastic article, circumference face of which as a shape transferred from said shape of the inside face of said resulting glass mold.