Ship Plate Grade

Structural steel for hull is divided into general strength structural steel and high strength structural steel according to its small yield point. The general strength structural steel according to CCS standards is divided into four quality grades: A, B, D and E; The high-strength structural steel specified in the rules and standards of China Classification Society has three strength grades and four quality grades.

A32 D32 E32 F32 ≤ 50mm carbon equivalent CEQ,% not more than 0.36

>50-100 carbon equivalent CEQ,% not more than 0.4

A36 D36 E36 f36 ≤ 50mm carbon equivalent CEQ,% not more than 0.38

>50-100 carbon equivalent CEQ,% not more than 0.4

A40 D40 E40 F40 ≤ 50mm carbon equivalent CEQ,% not more than 0.4

>50-100 carbon equivalent CEQ ship plate steel,% none

Due to the particularity and complexity of ship working conditions and high-strength ship plate, higher requirements are put forward for the metal materials for manufacturing hull structure

1. Strength: the ability of metal materials to resist fracture and deformation under the action of external force.

2. Plasticity: the ability of metal materials to produce plastic deformation without damage under the action of external force.

3. Impact toughness: the ability of metal to resist impact load and brittle failure.

4. Fatigue strength: the ability of metal materials to resist repeated external forces, that is, the ability not to cause damage under infinite times of alternating load.

5. Hardness: the ability of metal materials to resist harder objects pressing into the surface.

Hull steel is a professional carbon steel used for the construction and repair of ship shells and their auxiliary structures. Professional carbon steel used for building and repairing ship shells and their auxiliary structures. The performance of this kind of steel determines the hull structure design and construction technology. Therefore, there are strict requirements for the chemical composition, mechanical properties, process properties and quality of steel, so as to ensure the shipbuilding quality. Marine steel is required to have certain strength, toughness and, certain low temperature and corrosion resistance, and good welding performance.

Hull steel should have enough toughness and fatigue strength. Toughness is the ability to resist brittle failure. Due to the different stress state, loading speed and temperature after machining, the tendency of brittle state of hull steel is also different, and brittle fracture is easy to occur. Therefore, good toughness, especially low-temperature toughness, is required to ensure the safety of ocean navigation. Fatigue performance is to ensure that the ship will not produce low cycle fatigue under various alternating loads, so as to improve the service life of the ship.

In order to achieve the domestic self-sufficiency rate of shipbuilding steel plate to reach more than 90% and basically occupy the market, it is necessary to adjust and optimize the variety structure

(1) Increase the production of grade 32 and 36 high-strength ship plates, develop grade 40 high-strength ship plates as soon as possible, and form a series of ship plate steel grades;

(2) Increase the production proportion of wide steel plate (more than 3000mm) to diversify the specifications of ship plate; Expand the scope of ship plate certification;

(3) Strengthen enterprise management and improve the ability to accept small batch and multi variety orders;

(4) Improve technical equipment, carry out research on ship plate TMCP process, and develop and produce TMCP Steel plate.

Why choose us?

• We are committed to meeting the needs of our customers and exceeding their expectations.
• Our company adheres to the business philosophy of "steady and aggressive, standardized operation, honest operation, prudent and efficient", and is committed to creating stable and high level of value growth for our customers.
• We always follow strict quality control standards to ensure that our products meet the highest standards.
• Our Ship Plate Grade has reasonable production process, stable product quality, and is suitable for large-scale production.
• We understand the importance of delivering our products on time and at a competitive price.
• Our concentrate on is always to consolidate and enhance the excellent and service of present solutions, in the meantime regularly develop new products to meet distinctive customers' demands for Ship Plate Grade.
• Our factory is committed to reducing waste and protecting the environment.
• Based on a deep understanding of the development trend of the industry, the company will give full play to its core advantages and write a new chapter with peers!
• We are dedicated to providing our customers with the best possible products and service.
• We should establish the sense of integrity, carry out integrity education, make integrity as the proper quality of each cadre and staff, effectively comply with the law, loyalty and honesty, and consciously develop good professional conduct and moral behavior.

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