H-shaped steel is a common steel shape, which has the following advantages and disadvantages.

Advantages: 

-High strength: H-shaped steel has a large cross-sectional area, so it has high strength and rigidity, and can withstand large loads. 

-Good stability: the section shape of H-shaped steel is symmetrical, which has good stability and can resist overturning and lateral displacement.

-Construction convenience: H-shaped steel has simple section shape, light weight, and is convenient for transportation and installation. 

-Material saving: the section shape of H-shaped steel can make full use of materials and save material costs. 

-Widely used: H-shaped steel is widely used in building structures, machinery manufacturing, shipbuilding, bridge construction and other fields. 

Disadvantages: 

-High cost: the production cost of H-shaped steel is high, and the price is relatively high compared with other steel shapes. 

-Poor corrosion resistance: H-shaped steel is easy to be affected by oxidation and corrosion, especially in humid, high temperature, dusty, acid-base and other environments. Therefore, anti-corrosion treatment is required. 

-Poor plasticity: the section shape of H-shaped steel is fixed, and the plasticity is poor, which cannot meet some special construction requirements.