Mechanical Properties

 

Load - Bearing Capacity
Steel with a high yield strength can bear greater loads. In building structures, such as columns used to support the weight of buildings or beams that carry floor loads, the use of high - yield - strength steel (such as Q390 and Q420 steel) can reduce the cross - sectional dimensions of components. Take a super - high - rise building as an example. The columns at the bottom need to bear huge vertical pressure. If steel with a higher yield strength is used, the cross - sectional area of the columns can be effectively reduced. While ensuring the safety of the structure, it can also increase the usable space inside the building.
 

 

Deformation Characteristics
The yield strength of steel determines the stress at which obvious plastic deformation begins. Steel with a lower yield strength (such as Q235 steel) will enter the plastic deformation stage under relatively small stress. In some structures with strict deformation requirements, this may lead to larger deformations. For example, in the support structure of precision instruments and equipment, if the yield strength of the steel is too low, the structure will have a large deformation under the weight of the equipment itself or a small external force, affecting the accuracy of the instruments.
 

 

Processing Properties

 

Cutting Processing
Generally speaking, steel with a lower yield strength (such as Q235 steel) is relatively easier to cut. Because during the cutting process, a lower yield strength means that the steel has less resistance to the cutting tool. For example, when using flame cutting or plasma cutting, Q235 steel can be cut more smoothly and the quality of the cut is easier to control. For high - yield - strength steel, due to its high strength, more cutting energy is required during cutting, and it may cause more wear on the cutting tool.
However, with the development of modern processing technologies, there are also some effective cutting methods for high - yield - strength steel, such as laser cutting. Laser cutting can precisely control the cutting path and heat - affected zone and can achieve better cutting quality when cutting high - yield - strength steel, but the equipment cost is relatively high.

 

Bending and Forming Processing
Steel with a lower yield strength is easier to operate during bending and forming processing. In the field of building decoration, some metal components with complex shapes (such as decorative bent pipes, engraved plates, etc.) usually choose steel with a lower yield strength, such as Q235 steel or some low - carbon high - quality carbon steel. These steels can be bent and formed under a relatively small external force, making it convenient to produce various shapes.
 

 

 

 

 

 

 

Grade	Mechanical Property
	Tensile Strength(MPa)	Yield Strength(MPa)	% Elongation in 2 in.(50mm) min	Impacting Test Temperature(°C)
GL-D420	400-520	235	22	20

 

 

Welding Properties

 

Welding Difficulty
Steel with a lower yield strength usually has relatively lower welding difficulty. During the welding process, the yield strength of steel will affect the quality of the welded joint. For steel with a lower yield strength such as Q235 steel, the deformation of the heat - affected zone during welding is relatively small, and the residual stress of the welded joint is also low. Because during welding, the lower yield strength makes the steel less likely to produce a large internal stress concentration during the heating process and is more likely to achieve good welding fusion.
 

 

Performance Change after Welding
After welding, the performance change of low - yield - strength steel is relatively small. In the heat - affected zone, the change in the mechanical properties (such as strength and toughness) of the steel is not significant. For example, in the heat - affected zone after Q235 steel is welded, the degree of decrease in strength and toughness is relatively small, and the impact on the performance of the entire structure is limited.

 

 

 

 

Why Choose Us?
We take pride in our ability to provide custom solutions for our customers' unique needs.
We analyze and compare the previous products and the current technical situation of our GL-D420 Steel Plate, and develop new technical specifications and processes.
Our customers trust us to deliver high-quality Cold-rolled Steel products on time and on budget.
We strictly implement the warm and thoughtful after-sales service, adhere to the development of good professional ethics.
We offer a wide range of Cold-rolled Steel products to meet diverse customer needs.
We adhere to the customer-centric and brand-oriented business philosophy, and continue to provide customers with reliable and excellent products and services.
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All staff of our company and all departments work together to combine business management, professional technology, quantitative statistical methods and ideological education.
Our Cold-rolled Steel products are known for their durability and reliability.
 

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