# BS4449 Reinforcement bar GR460 Grade Steel

What is GR460 Grade Steels? GR460 grade steel is a structural billet steel for structural applications. GR460 grade is a material grade and designation defined in BS4449 standard. BS4449 is a British material standard for Carbon Steel Bars for Concrete Reinforcement for strengthening application. GR460 grade Steel is lower in strength as compare to A615-75 steel.

Dimensional Characteristics of GR460 Grade Steels: The nominal size for this GR460 GRADE material as defined in the BS4449 ranges to 8-40 mm. The cross sectional area is about 50-1963 mm2.

The Chemical Composition of GR460 Grade Steels: BS4449 defines the chemical composition of GR460 Grade steels as under:

Maximum percentage of Carbon (C) is identified by the standard i.e. 0.25

Maximum percentage of Phosphorous (P) is identified by the standard i.e. 0.050

Maximum percentage of Sulphur (S) is identified by the standard i.e. 0.050

Maximum percentage of Aluminum (Al) is identified by the standard i.e. 0.020

Maximum percentage of Nitrogen (N2) is identified by the standard i.e. 0.0008

Remaining is iron (Fe) percentage and with few other alloys and negligible impurities.

Mechanical Properties of GR460 Grade Steels: The tensile strength of the GR460 Grade Steels is expressed in Newton per millimeters and it must be at-least 460 N/mm2 (MPa). The yield strength is not identified. The minimum percentage ranges for elongation is 12% thicknesses.

This material is used in civil engineering constructions like Housing, Bridges, & roads.