K A32 Steel Plate

 

 

Mechanical Properties

 

Yield Strength

 

During medium - temperature aging at 150 - 250°C, the alloy elements in KA32 steel will precipitate at an appropriate rate to form precipitates. These precipitates can effectively impede the movement of dislocations. For example, at around 200°C for about 15 hours of aging, as the precipitates form and grow, dislocations need to bypass these precipitates during movement, which requires more energy and thus significantly increases the material's yield strength. Compared with the KA32 steel without aging treatment, the yield strength may increase by about 30% - 50%. This enables the steel to better resist plastic deformation when subjected to external forces and improves the stability of the structure.

 

Tensile Strength

 

During the medium - temperature aging process, in addition to the improvement of yield strength, the tensile strength will also be enhanced. Due to the presence of precipitates, the material can withstand greater tensile forces in a tensile test. The precipitates can act as a strengthening phase and prevent the generation and propagation of micro - cracks inside the material. After aging in this temperature range, the tensile strength may increase by about 20% - 40%. For example, the KA32 steel components used in shipbuilding, after medium - temperature aging treatment, can withstand higher external impacts such as wind and waves and reduce the risk of structural damage.

 

 

 

Physical Properties

 

Density Change

 

During the aging process at 150 - 250°C, due to the rearrangement of atoms and the formation of precipitates, the density of KA32 steel will change slightly. Generally speaking, the density of the precipitates is different from that of the matrix material. When the precipitates are formed, the overall density of the material may increase or decrease slightly, but this change is very slight, usually less than one - thousandth. In most practical applications, this density change has little impact on the use of the material. For example, in building structures or mechanical parts, this slight density change will not have an obvious negative effect on their performance.

 

 

 

 

 

 

 

NK/K A32 high Strength Chemical Composition
Grade	The Element Max (%)
	C	Si	Mn	P	S	Al	N
NK/K A32	0.18	0.50	0.90-1.6	0.035	0.035	0.015
	Nb	V	Ti	Cu	Cr	Ni	Mo
	0.02-0.05	0.05-0.10	0.02	0.35	0.2	0.4	0.08

 

Coefficient of Thermal Expansion Change

 

Medium - temperature aging will change the coefficient of thermal expansion of KA32 steel. The thermal expansion characteristics of the newly - formed precipitates and the matrix are different, which will lead to a change in the expansion behavior of the material when it is heated. After aging in this temperature interval, the coefficient of thermal expansion may decrease by about 10% - 20%. For some applications with high requirements for dimensional accuracy, such as parts of precision instruments, this change in the coefficient of thermal expansion needs to be considered to avoid the impact on the dimensional accuracy of the parts in a temperature - changing environment.

 

Corrosion Resistance

 

Medium - temperature aging can improve the corrosion resistance of KA32 steel. During the aging process, a dense oxide film may be formed on the surface of the steel or the alloy elements may be enriched on the surface. For example, after aging at 180°C for 18 hours, some alloy elements (such as chromium, nickel, etc.) will diffuse to the surface to form a protective film, preventing the contact of corrosive media (such as seawater, acidic solutions, etc.) with the steel matrix. At the same time, the uniformly distributed precipitates inside can also reduce the corrosion channels inside the material and improve the material's corrosion resistance. This is very important for KA32 steel structures used in harsh environments such as the marine environment.

 

 

 

 

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 K A32 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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