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More marine steel plate information

Gnee marine grade steel plate factories has the largest inventory of marine steel plate at its warehouse in Tianjin, China headquarters, so low marine grade steel plate price.

  • LR Grade A
  • LR DH36
  • LRAH36
  • ABS AH36
  • ABS DH36
  • ABS EH36
  • BVDH36
  • GLD36
  • S355G7+M
  • UT (Ultrasonic examination)
  • AR(As Hot Rolled only)
  • TMCP(Thermal Mechanical Control Processing)
  • N(Normalized)
  • Q+T(Quenched and Tempered)
  • Z Direction Test(Z15,Z25,Z35)
  • Charpy V-Notch Impact Test
  • The Third Party Test (such as SGS Test)
  • Coated or Shot Blasting and Painting

Thickness: 3 MM – 200 MM

Width: 1220MM – 4200MM

Length: 5000-18000mm

Customize: Available

Gnee Steel can provide the following processing services for shipbuilding steel:

  • High-definition Plasma Cutting
  • Oxy Profiling
  • Flame Cutting
  • Punching
  • Drilling
  • Tapping
  • Bevelling
  • Counter Sinking
  • Counter Boring


  • Shipbuilding
  • Offshore Platforms
  • Marine Pipelines
  • Construction Of Naval Ships

What‘s the feature of Gnee Marine Steel Plate?


Raw material selection: Gnee carefully selects high-quality raw materials for the production of shipbuilding steel plates. These materials are rigorously tested and inspected to ensure they meet the chemical composition, mechanical properties and other specifications required by international and national standards.

Manufacturing process: Gnee adopts advanced manufacturing process to produce shipbuilding steel plate. This includes precise control of the heating, rolling and cooling processes to achieve the desired mechanical properties and ensure uniformity across the sheet. Strict quality control measures are implemented at every stage of production to monitor and maintain the quality of the shipbuilding plate.

Testing and certification: Gnee conducts comprehensive testing and quality inspection of shipbuilding steel plates. This includes testing of mechanical properties such as tensile strength, yield strength and impact resistance, as well as dimensional inspection and non-destructive testing. Shipbuilding plates are certified by recognized classification societies such as ABS, DNV, LR, BV, ensuring compliance with international and national standards.

Documentation and Traceability: Gnee maintains detailed documentation and traceability records of each batch of shipbuilding steel plates. This includes material certificates, inspection reports and manufacturing records, enabling customers to verify the quality and compliance of the shipbuilding plate.

Continuous Improvement: Gnee is committed to continuous improvement of its manufacturing processes and quality management system. The company regularly reviews and updates its production procedures, equipment and quality control measures to improve the quality of shipbuilding steel plates and meet the changing requirements of international and national standards.

Tensile Strength: Gnee shipbuilding steel plate has high tensile strength, which can withstand greater tensile force without breaking or deforming. This makes the ship have better tensile performance when impacted by external forces, ensuring the structural safety of the hull.

Yield strength (yield strength): The yield strength of Gnee shipbuilding steel plate is also high, that is, it will not produce plastic deformation when subjected to a certain strain. This enables the ship to withstand high torsional and current pressures during operation, maintaining structural stability and integrity.

Impact Toughness: Gnee shipbuilding steel plate has good impact toughness, that is, it can not break when damaged and impacted. Critical to the safety of the ship in the event of a damaging collision or other unexpected impact, reducing the extent of structural damage.

Corrosion Resistance: Gnee shipbuilding steel plates are made of materials with good corrosion resistance, which can resist moisture corrosion and oxidation. This prolongs the life of the vessel and reduces maintenance costs.

Material selection: We choose materials with good corrosion resistance, such as stainless steel with high corrosion resistance, weathering steel, aluminum alloy, etc. These materials have a low oxidation rate and excellent element content, which can effectively resist oxidation, corrosion and other chemical reactions.

Coating: Gnee performs coating coating treatment for coatings used in shipbuilding, such as spraying or thermal bonding, etc. These coatings can form a protective film that effectively isolates the contact between the coating medium and the coating, reducing the possibility of corrosion.

Uniform thickness: The shipbuilding steel plate manufactured by Gnee has a thickness distribution, and precise control measures are taken during the manufacturing process to ensure that the thickness of the steel plate surface is uniform. This helps improve corrosion resistance and reduces the possibility of corrosion concentrations.

Resistance to marine chloride ions: Chloride ions in the marine environment are the main source of corrosion for shipbuilding steel plates. Gnee’s shipbuilding steel plate adopts the anti-chloride ion summary material and treatment process, which effectively reduces the corrosion degree of the steel plate after contact with seawater.

Anti-corrosion performance test: Gnee conducts corrosion resistance tests on shipbuilding steel plates, such as salt spray test, corrosion test, etc. These tests can simulate the corrosion situation in real marine environment, evaluate the corrosion resistance of the steel plate and ensure that it meets the relevant standards and regulations.

Cold Work Hardening: Gnee shipbuilding steel plate has high hardening during cold working, that is, its hardness and strength will gradually increase during the process of being processed. This is conducive to improving the deformation resistance, fatigue resistance and compression resistance of the steel plate, making it more suitable for bearing the load of the hull structure.

Processing Stability: Steel plates for shipbuilding have good stability during cold working, and are not prone to problems such as internal adhesion or cracking. This makes the manufacturing process more reliable, reducing scrap rates and the possibility of machining errors.

Cold Bending Properties: Gnee shipbuilding steel plates can be cold bent without breaking or cracking. This cold formability allows the steel plate to conform to the curved shape of the ship’s structure, providing better appearance and design flexibility.

Weldability: Gnee shipbuilding steel plate has good weldability and can be welded during cold working. This makes the manufacture of steel plates more convenient and enables the assembly and connection of complex structures.

Weldability: Gnee shipbuilding steel plate has good weldability and can be effectively joined with other metal materials. This means that during the welding process, the steel plate and the welding material can be well fused and form a firm weld, ensuring the strength and tightness of the welded joint.

Low tendency of welding hot cracking: Gnee shipbuilding steel plate has low tendency of hot cracking during welding. Hot cracking refers to the generation of cracks caused by thermal stress in the material during the welding process. The low thermal cracking tendency of Gnee shipbuilding steel plate can reduce defects and damages during welding, and improve the quality and reliability of welded joints.

High toughness: Gnee shipbuilding steel plate has high toughness, that is, it can resist the expansion of cracks during the welding process. This means that welded joints are less prone to cold cracks and hot cracks, thereby enhancing the durability and safety of welded joints.

Good welding deformation control: Gnee shipbuilding steel plate can control the amount of deformation in the welding process through appropriate welding process and parameters. This helps to keep the shape and dimension of the welded structure stable, reducing distortion and stress concentrations in the welded joint.

Gnee steel plate ship is relatively low in price while ensuring the quality, which can benefit from the following factors:

Production scale efficiency: Gnee steel plate shipbuilding is mass-produced on a large scale, which can reduce the production cost per unit product. Through mass production, fixed costs can be spread out and production efficiency can be increased, thereby reducing the production cost per ship.

Efficient production process: Gnee adopts advanced production process and equipment to make the production process more efficient. For example, using advanced CNC cutting technology, welding process and quality control system can reduce the scrap rate, reduce labor and material waste, and thus save costs.

Optimizing supply chain management: Gnee has established a solid supply chain management system and supplier network, and has established stable cooperative relationships with reliable raw material suppliers and parts suppliers. By optimizing the supply chain, obtaining more competitive raw material prices and more timely delivery, thereby reducing manufacturing costs.

Lean production concept: Gnee pays attention to lean production, and realizes cost reduction by eliminating waste and improving production efficiency. For example, measures such as reducing unnecessary inventory, improving line layout, implementing standardization and continuous improvement can increase production efficiency and save costs.

Innovative technology and engineering design: Gnee is committed to adopting innovative technology and engineering design to improve the performance and efficiency of ships. By using new materials, optimizing structural design, and improving ship energy utilization, the operating costs of ships can be reduced, and the price of ships can be reduced first.

Why Choose Gnee As Marine steel plate supplier

If you want to find a trustable marine plate manufacturer, Gnee will be your best choice. 15 years of experience offshore steel plate manufacturer, certified by the classification society, CE, ISO, and SGS. And we guarantee the highest safety and quality standards. We fulfill all requirements of reputed classification societies.

In addition, our drilling plate steel has been successfully exported to more than 60 countries such as Germany, South Korea, the United States, Mexico, and Argentina. Many regular customers come to visit our company and factory and make multiple orders.


What Services Gnee Provide?

Measurement Services

Gnee can provide the following measurement services for shipbuilding steel plates:

1. Dimensional measurement: Measure the dimensional parameters such as length, width and thickness by measuring instruments to ensure that the steel plate is qualified and meets the design requirements.
2. Surface measurement: Measure parameters such as flatness, unevenness and surface roughness of the steel plate surface to help ensure that the quality and surface state of the steel plate meet the requirements.
3. Thickness measurement: Use a thickness measuring instrument to accurately measure the thickness of the steel plate to ensure that it meets the design requirements.
4. Material measurement: use material analysis instruments to measure the chemical composition and mechanical properties of the steel plate to ensure that the quality and performance of the steel plate meet the requirements.
5. Bending and Deformation Measurements: During shipbuilding, steel plates may undergo bending and deformation. The degree of bending and deformation of the steel plate is measured and monitored by using tools such as bending measuring instruments and displacement sensors to ensure that it is within the allowable range.

Ask Measurement service

Custom Sizes And Shapes

Gnee can customize the size and shape of steel plates for your marine project according to your specific project needs. The custom design of the steel plate is carried out by a professional engineer and design team. Based on the requirements and constraints of the project, they will use calculation and simulation tools, combined with experience and technical knowledge, to optimize the steel plate design to meet the specific needs of your offshore engineering.

● According to the load calculation and strength requirements of structural design, adjust the thickness, width and length of shipbuilding steel plates
● The shape of the steel plate can be designed according to the characteristics of the marine environment. For example, in order to reduce the impact of waves on the structure, the shape of the steel plate can be spherical or flat.
● If you consider the convenience of installation and maintenance, we can also add openings and passages for easy access and operation in the design for areas that require frequent maintenance.

Ask Customized Services

Deep Processing Service

Purchasing Gnee shipbuilding steel plate can provide the following deep processing services. We can customize according to the specific needs of customers to meet the requirements of different ship engineering.

Cutting service: Shipbuilding steel plates can be custom cut to obtain the desired shape and size according to the needs of customers. For example, flame cutting, plasma cutting, laser cutting, etc., can cut steel plates into required plates, blocks, special-shaped parts, etc.
Bending and forming: Shipbuilding steel plates are bent and formed by stress application and appropriate processes to obtain the desired shape.
Welding services: Shipbuilding steel plates can be subjected to various types of welding services, including manual arc welding, gas shielded welding, laser welding, etc.
Turning and machining of holes: Turning and machining of holes in shipbuilding steel plates by using machining equipment. These processes produce smooth surfaces, precise holes and threads to meet specific assembly requirements.
Surface treatment: In order to improve the corrosion resistance and aesthetics of the steel plate, surface treatment can be carried out. This includes methods such as spraying, hot-dip galvanizing, electroplating, etc. to add a protective layer and provide corrosion resistance.

Ask Deep Processing Services

Support Third-Party Detection

Gnee shipbuilding steel plate can provide the following testing services through third-party testing agencies. These third-party testing services can provide independent, objective verification that shipbuilding steel plates comply with relevant standards and regulations.

Material chemical composition analysis: Through chemical composition analysis, determine whether the composition of the shipbuilding steel plate meets the standard requirements.
Mechanical performance test: mechanical performance test includes tensile test, impact test, bending test, etc., which are used to determine whether the mechanical properties such as strength, toughness and ductility of shipbuilding steel plate meet the specified requirements.
Metallographic testing: Through metallographic testing, check the structure, grain size, non-metallic inclusions, etc. of shipbuilding steel plates to evaluate their quality and performance.
Corrosion performance test: Through the corrosion performance test, evaluate the corrosion resistance of shipbuilding steel plates, including salt spray corrosion resistance, chemical corrosion resistance, etc.
Hardness test: Hardness test is used to measure the hardness of shipbuilding steel plate, and its strength and wear resistance can be evaluated according to the hardness value.
Ultrasonic flaw detection: Ultrasonic flaw detection is used to detect internal defects of shipbuilding steel plates, such as cracks, pores, inclusions, etc.

Ask Deep Processing Services
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