Angle steel is a structural steel for construction, which is a section steel with simple section,

 It is mainly used for metal components and plant frame.In use,  

it is required to have good weldability, plastic deformation performance and certain mechanical strength.

Channel steel is a long strip of steel with groove section, which belongs to carbon structural 

 steel for construction and machinery.Channel steel is mainly used for building structure, 

 curtain wall engineering, mechanical equipment and vehicle manufacturing.

H-beam steel is a kind of economic section high-efficiency profile with more optimized  

section area distribution and morereasonable strength weight ratio.Because all parts of  

H-section steel are arranged at right angles, H-section steel has the advantages 

 of strong bendingresistance, simple construction, cost saving and light structural weight in all directions

I-beam is also called steel beam, It is a long strip of steel with I-shaped section.

 I-beam is divided into ordinary I-beam and light I-beam.More members are directly 

 used for bending in the plane of their webs or form lattice stressed members.

Flat steel refers to steel with width of 12-300mm, thickness of 3-60mm, 

 rectangular section and slightly blunt edge.Flat steel can be finished steel, 

 or it can be used as blank for welded pipe and thin slab for laminated thin plate. 

Main uses: as a finished material, flat steel can be used to make hoop iron, 

 tools and mechanical parts, and used as buildingframe structural parts and escalators in buildings.