Q215 carbon steel I beam is an I-shaped steel beam made of Q215 carbon structural steel. Q215 represents the yield strength of this material. The following 215 indicates that the yield strength is 215MPa, and the yield value will decrease as the thickness of the material increases. The specifications of the I-beam can be expressed by the main outline size (mm) of its cross-section, that is, the millimeters of waist height (h) × leg width (b) × waist thickness (d), such as I160×88×6, which means The waist height is 160mm, the leg width is 88mm, and the waist thickness is 6mm I-beam.