Identifying authentic Bisalloy steel plates requires checking a combination of physical stencil markings, manufacturer paperwork, and standardized product documentation. Bisalloy, an Australian-made high-hardness and structural steel, typically features distinct paint stencil markings stamped directly onto the surface of the steel plates. These stencils display critical identifying information, including the specific grade designation (such as Bisalloy 360, 400, 500, or structural grades), batch numbers, plate thickness, heat numbers, and the trademarked Bisalloy logo. Additionally, purchasers receive certified mill test certificates from authorized distributors that correlate directly with the physical stampings on the delivered steel sheets to guarantee authenticity and material performance compliance.