I steel is widely used in various building structures, Bridges, vehicles, supports, machinery and so on.I-steel is divided into ordinary I-steel and light I-steel, hot rolled ordinary I-steel specifications for 10-63#. The specification of hot rolled ordinary I-steel supplied by agreement of both parties is 12-55#. I-steel specifications can also be expressed by model number, which indicates the number of centimeters of waist height, such as Gong 16#. If the i-beam with the same waist height has several different leg widnesses and waist thicknesses, it is necessary to add a, B and C on the right side of the model to distinguish it, such as 32A # 32B # 32C # and so on.Shandong Xinhe international trade countries are mainly baotou Steel, Laigang, Wisco, Maanshan steel and other few steel production.