12mm Diameter Deformed (HD12) Grade 500E Reinforcing Bar (6m length) In Grade 500E bar the "HD" prefix stands for "High-Tensile Deformed" (Grade 300E only has the "D" prefix for "Deformed). Our bar meets the demanding requirements of AS/NZS 4671 compliance. Engineered with exceptional seismic performance. High yield strength and elongation properties. Ideal for structural applications such as foundations, columns, beams, and slabs. The 'E' in 500E denotes its earthquake-resistant properties, making it ideal for structures that require a higher degree of flexibility to handle seismic forces.