VL/EH32 Ship Building Plate

 

 

The surface quality of shipbuilding steel plate VL/EH32 usually has the following requirements:

 

I. Appearance requirements

 

Flatness: The surface of the steel plate should be relatively flat and there should be no obvious unevenness. This is crucial for subsequent processing (such as welding, cutting, etc.) and installation in the ship structure. If the surface is not flat, it may affect the welding quality, resulting in unsteady welding or even problems such as cracks. At the same time, an uneven surface will also affect the aesthetics and overall performance of the ship structure.

No cracks: There should be no cracks on the surface. Cracks are a serious defect that will greatly reduce the strength and toughness of the steel plate. During the use of the ship, it may lead to structural damage and endanger the safety of the ship. Even tiny cracks may gradually expand under stress and eventually cause serious accidents.

No folding: There should be no folding phenomenon on the surface of the steel plate. Folding will increase the local thickness of the steel plate and affect the uniformity and stability of the structure. In shipbuilding, the folded part may become a stress concentration point, reducing the bearing capacity of the steel plate and increasing the risk of structural damage of the ship.

 

II. Surface cleanliness requirements

 

No oil stains: There should be no oil stains or other impurities on the surface of the steel plate. Oil stains will affect the welding quality and reduce the strength of the welded joint. During the welding process, oil stains may cause defects such as pores and slag inclusions, reducing the compactness and corrosion resistance of the weld. In addition, oil stains may also affect the adhesion of coatings and make the anti-corrosion coating unable to effectively protect the steel plate.

No rust: The surface should have as little rust as possible. Although shipbuilding steel plates are usually subjected to anti-corrosion treatment, excessive rust will affect the effect of the anti-corrosion coating and accelerate the corrosion of the steel plate. During the use of the ship, rust may also fall off, pollute the surrounding environment, and may block the ship's drainage system and other equipment.

No scale: Steel plates may produce scale during the production process, and these scales need to be removed. The presence of scale will affect the surface quality and performance of the steel plate, reducing its corrosion resistance and welding performance. During welding, scale may be mixed into the weld and form defects such as slag inclusions, affecting the welding quality.

 

III. Dimensional accuracy requirements

 

Uniform thickness: The thickness of the steel plate should be kept uniform within the specified range. Uneven thickness will affect the strength and stability of the ship structure and may cause stress concentration at different parts, leading to structural damage. At the same time, uneven thickness will also bring difficulties to processing and installation and increase construction difficulty and cost.

Small tolerance in width and length: The width and length of the steel plate should meet the design requirements, and the tolerance should be controlled within a small range. Excessive tolerance in width and length may lead to problems such as loose splicing and size mismatch during shipbuilding, affecting the structural integrity and appearance quality of the ship.

 

Grade	Chemical compostion %
C	Si	Mn	P	S	Als

D

≤0.21

≤0.35

0.6-1.2

≤0.035

≤0.035

≥0.015

 

 

IV. Other requirements

 

Clear marking: The surface of the steel plate should be marked with clear specifications, models, materials, etc. for easy identification and management. These markings are very important for material traceability and quality control during shipbuilding.

Moderate surface roughness: The surface roughness should meet the requirements of relevant standards. Appropriate surface roughness can improve the adhesion of coatings and enhance the anti-corrosion effect. However, if the surface roughness is too large, it may affect the appearance quality of the steel plate and may not be applicable in some special occasions (such as parts that require a smooth surface).

 

 

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 VL/EH32 Ship Building 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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