Carbon Structural Steel

 

Q235 Steel
This is a widely - used carbon structural steel. In building structures such as simple industrial workshops and warehouses, Q235 steel will bear long - term sustained loads. For example, in the roof truss structure of some small warehouses, the steel beams and columns made of Q235 steel have to bear the dead load generated by the roofing materials and stored goods, as well as the live load such as people walking around and goods loading and unloading for a long time. When the storage capacity of the warehouse approaches or exceeds the designed capacity, the steel will be under a relatively large sustained load for a long time, and situations similar to GL - D460 steel will occur, such as changes in the internal crystal structure of the steel and a decrease in strength and toughness.

 

 

 

High - strength Low - alloy Structural Steel

 

Q390 Steel
It is commonly used in heavy - duty machinery manufacturing and large - scale building structures. Taking the boom structure of a large - scale crane as an example, the boom made of Q390 steel has to bear its own weight and the weight of the hoisted heavy objects for a long time. Under the action of long - term sustained loads, the microscopic structure of the steel will change, such as the slip and deformation of grains. Moreover, due to its high - strength characteristics, in the case of long - term overloading, more complex microscopic damages may occur, such as the appearance of micro - cracks at the grain boundaries, which will further affect the service life of the steel.

 

Q420 Steel
It is applied in high - rise buildings and long - span bridges. For example, in the main cables and main girders of some cross - sea bridges, Q420 steel has to bear huge dead loads (such as the self - weight of the structure and the weight of auxiliary facilities) and long - term live loads (such as vehicle - running loads). In the environment of long - term sustained loads, similar to GL - D460 steel, its strength and toughness will gradually decrease, and fatigue damage may occur, affecting the safety performance of the structure.

 

Stainless Steel

 

 

 

 

 

 

NV E460 extra high general strength property
Grade		Mechanical Property			Charpy V Impact Test
	Thickness	Yield	Tensile	Elongation	Degree	Energy 1	Energy 2
NV E460	mm	Min Mpa	Mpa	Min %	-40	J	J
	t≤50	460	570-720	17%		31	46
	50＜t≤70	460	570-720	17%		31	46
	70＜t≤150	460	570-720	17%		31	46

 

 

304 Stainless Steel
Although stainless steel has good corrosion resistance, it will also be affected when bearing long - term sustained loads. In the field of building decoration, 304 stainless steel is used to make curtain wall frames and other structures. When the curtain wall area is large and the building is located in a high - wind - pressure area, the 304 stainless - steel frame has to bear the continuous pressure generated by wind loads for a long time. At the micro - level, the long - term continuous stress will lead to the dislocation movement inside the stainless steel, causing the material to have a strain - hardening phenomenon and thus changing its mechanical properties, such as reducing the material's ductility.

 

316 Stainless Steel
It is widely used in chemical equipment and offshore engineering structures. For example, in some supporting structures of offshore oil platforms, 316 stainless steel has to bear the platform's own weight, equipment weight, and long - term sustained loads such as wave impacts. The long - time load action will cause tiny cracks to appear inside the steel, and under the combined action of the corrosive environment and the sustained load, these cracks may accelerate and expand, threatening the integrity of the structure.

 

 

 

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We analyze and compare the previous products and the current technical situation of our GL-E460 Steel Plate, and develop new technical specifications and processes.
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We offer a wide range of Cold-rolled Steel products to meet diverse customer needs.
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