... , Q215B, Q235, Q235B, Q345, 20MnSi steel. Technical Parameters: Ordinary steel strapping Σ B≥ 65-75kg/mm2(650-750Mpa), Elongation: δ 5≥ 3%-5 ... % Ordinary steel strapping Σ B≥ 75-85kg/mm2(750-850Mpa), Elongation: δ 5≥ 4%-6 ... % High quality steel strapping Σ B≥ 85-1000kg/mm2(8501000Mpa), Elongation: δ 5≥ 5-8% Specifications ...