GL-A420 Steel Plate

 

Influence of Low Yield Strength on Plasticity

 

Easy to Enter the Plastic Deformation Stage
Steel with a lower yield strength, such as Q235 steel, will begin to produce plastic deformation under relatively small stress. This is because the stress value corresponding to its yield point is low. When the external force reaches this lower yield point, the crystal structure inside the steel begins to slip, and the dislocation movement intensifies, thus causing the steel to have obvious plastic deformation. For example, in some simple building structural members, such as purlins of small - scale warehouses, when subjected to roof loads and their own weight, if steel with a lower yield strength is used, a certain degree of plastic deformation may occur under normal service loads.

 

Greater Plastic Deformation Capacity
Since steel with a low yield strength can enter the plastic deformation stage earlier, it can withstand larger deformation without fracture in this stage. This characteristic makes this type of steel more suitable for some occasions that require plastic processing. For example, in the cold - bending forming process, Q235 steel can be more easily bent into various shapes because it can adapt to the shape of the mold through its own plastic deformation during the bending process and will not break due to prematurely reaching the strength limit.

 

 

 

 

 

 

 

 

 

 

GL-A420 steel plate

GL A420,GL A460,GL A500,GL A550,GL A620,GL A690 Shipbuilding Steel Plate

 

GL A420,GL A460,GL A500,GL A550,GL A620,GL A690 Shipbuilding Steel Plate in Anyang, Henan, China.
Steel Name:
GL A420,GL A460,GL A500,GL A550,GL A620,GL A690,GL F420,GL E550,Marine Steel plate ,
Main Application:
GL A420,GL A460,GL A500,GL A550,GL A620,GL A690,Ship steel plate is mainly used to Shipbuilding Project and Ocean Offshore Structural Project.
Steel Standard:
GL Rules or ABS,DNV,BV,GL,CCS,KR,NK,RINA,ASTM A131,
Rolling Size:
Thickness*Width*Length 3-200mm*1220-4200mm*5000-18000mm

 

 

Influence of High Yield Strength on Plasticity

 

Difficult to Enter the Plastic Deformation Stage
Steel with a high yield strength, such as Q420 steel, requires higher stress to make the steel begin to produce plastic deformation. This is because its internal crystal structure is more compact and the binding force between atoms is stronger. To make dislocation movement and crystal slip occur, a greater external force is needed to overcome this binding force. In building structures, for key supporting members of high - rise buildings, using high - yield - strength steel can keep it within the elastic deformation range when bearing larger design loads and reduce unnecessary plastic deformation.

 

Relatively Limited Plastic Deformation Capacity
Although high - yield - strength steel can also produce plastic deformation after yielding, its plastic deformation range is relatively narrow. This is because after reaching a higher yield strength, the microscopic structure inside the steel has already withstood a large stress, and continuous deformation may lead to the rapid expansion of internal defects (such as micro - cracks). For example, during the tensile test of Q420 steel, the strain range that it can withstand in the plastic deformation stage after yielding is smaller than that of steel with a lower yield strength. If the strain exceeds a certain limit during the plastic deformation process of this kind of steel, it is very likely to lead to the fracture of the steel.

 

Obvious Strain - hardening Phenomenon after Plastic Deformation
After high - yield - strength steel undergoes plastic deformation, the strain - hardening index is high. This causes the stress to increase significantly as the strain increases during the deformation process. For example, in the tensile test of some high - strength alloy steels, once the steel enters the plastic deformation stage, the slope of its stress - strain curve is large, indicating that the ability of the steel to resist deformation during continuous deformation increases rapidly. This obvious strain - hardening phenomenon can enable the steel to resist further deformation to a certain extent, but at the same time, it may also lead to work - hardening problems during subsequent processing or use of the steel, affecting its further plastic processing performance.

 

 

 

 

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-A420 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.
Our factory is committed to upholding the highest standards of safety and quality.
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.
Relying on the superior conditions and strong advantages of mass production, we are able to meet the different needs of our customers.

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