The steel perforated ventilating board has higher physical strength than the aluminum perforated ventilating board, and is usually used in the military project and occasion with a high requirement for electromagnetic shielding. The common material of steel perforated plate is SUS304 and SUS316. The common honeycomb diameter is 3.2mm and the honeycomb core thickness is 12.7mm. Its surface can be treated through electroplating or chemical nickel plating and tin plating to have the reliable performance in harsh environment. Owing to the stable shielding effectiveness and higher antiseptic property of steel perforated plate, it's mainly used in: high frequency test equipment, military communication, radar, aircraft turbine air-in protection, thermal power station etc.