Q355NH weather-resistant steel plate, GB/T4171-2008 standard, is a type of weather-resistant structural steel with superior welding properties compared to general weather-resistant steel. It has yield and tensile strengths close to low-alloy plates and excellent corrosion resistance. It is used in steel structures, vehicles, buildings, photovoltaic supports, ships, landscaping, and tower manufacturing. Typically, plates under 14mm are delivered in coil-rolled form, while those above 14mm are usually delivered as flat plates. Domestic manufacturers of Q355NH weather-resistant steel include Baosteel, Angang, Hebei Iron & Steel, Ansteel, Wuhan Iron & Steel, Lianyungang Iron & Steel, and more.