What is the Q345D H-beam steel

Q345D H-beam steel is a new type of economic construction low alloy steel. H-beam steel has a reasonable and economical cross-sectional shape, good mechanical properties, and the points on the cross-section during rolling are more uniform and less internal stress. Compared with ordinary I-beam steel, it has the advantages of large cross-section modulus, light weight, and metal saving, which can make the building The structure is reduced by 30-40%; and because the legs are parallel to the inside and outside, the legs are at right angles, and assembled into a component, which can save 25% of the workload of welding and riveting. Q345D H-beam steel is commonly used in large buildings (such as factory buildings, high-rise buildings, etc.) that require large bearing capacity and good cross-section stability, as well as bridges, ships, lifting and transportation machinery, equipment foundations, supports, and foundation piles.

The characteristics of Q345D H-shaped steel are as follows:

1. The flange is wide and the lateral rigidity is large.
2. Strong bending resistance, about 5% -10% than I-beam.
3. The two surfaces of the flange are parallel to each other, making connection, processing and installation easy.
4. Compared with welding I-beam steel, the cost is low, the precision is high, and the residual stress is small. There is no need for expensive welding materials and welding seam detection, saving about 30% of the steel structure manufacturing cost.
5. Under the same cross-section load, the weight of hot-rolled H steel structure is 15% -20% lighter than that of traditional steel structure.
6. Compared with the concrete structure, the hot-rolled H-steel structure can increase the area use by 6%, while the structural weight is reduced by 20% to 30%, reducing the internal force of structural design.
7. H-shaped steel can be processed into T-shaped steel, and honeycomb beams can be combined to form various cross-sectional forms, which greatly meets the needs of engineering design and production.
 

Application range of Q345D H-beam steel

Q345D H-beam steel is mainly used for beam and column members in industrial and civil structures.

1. Steel structure bearing bracket of industrial structure
2. Steel pile and supporting structure for underground engineering
3. Structure of industrial equipment such as petrochemical and electric power
4. Long-span steel bridge components
5. Ship and machinery manufacturing frame structure
6. Trailer, car, tractor beam support
7. Port conveyor belt, high-speed baffle bracket

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