LR Shipbuilding Steel Plate LR AH36,LR DH36,LR EH36,LR FH36 Marine Steel Plate

LR (Lloyd's Register) shipbuilding steel plates have the following characteristics:

 

LR AH36

 

Strength: The "H36" indicates a minimum yield strength of around 355 MPa. This strength allows the steel plate to withstand the mechanical stresses that ships experience during operation, such as those from waves, wind, and cargo.

Toughness: It has good toughness properties, which are crucial for preventing brittle fractures in the marine environment. This ensures the safety and durability of the ship's structure.

Application: Commonly used in the construction of the ship's hull, decks, and other structural components.

 

LR DH36

 

Enhanced Toughness: Compared to AH36, DH36 has higher toughness requirements, especially at lower temperatures. This is important for ships operating in cold waters or in areas where the structure may be subjected to low - temperature impacts.

Strength: Maintains a similar yield strength as AH36.

Usage: Often used in areas where there is a greater risk of impact or in ships that operate in colder regions.

 

LR EH36

 

Higher Strength and Toughness: EH36 steel plates have both high strength and good toughness. They are designed to meet the demanding requirements of critical shipbuilding applications.

Low - Temperature Performance: They also offer good performance at low temperatures, ensuring the safety and integrity of the ship's structure in various environmental conditions.

Application Areas: Suitable for critical structural parts of ships that require a combination of high strength and good low - temperature toughness.

 

LR FH36

 

Superior Toughness: FH36 has the highest toughness requirements among these grades. This makes it ideal for applications where the structure is subjected to extreme impact or in special - purpose vessels that demand the highest level of toughness and reliability.

Strength: Consistent with the other grades in terms of yield strength.

Usage: Typically used in areas that are subjected to extreme impact or in special - purpose vessels.

 

 

Steel Grade

C

Si

Mn

P

S

Als

AH36	≤0.18	≤0.50	0.9~1.6	≤0.035	≤0.035	≥0.015
DH36	≤0.18	≤0.50	0.9~1.6	≤0.035	≤0.035	≥0.015
EH36	≤0.18	≤0.50	0.9~1.6	≤0.035	≤0.035	≥0.015
FH36	≤0.18	≤0.50	0.9~1.6	≤0.035	≤0.035	≥0.015
AH40	≤0.18	≤0.50	0.9~1.6	≤0.035	≤0.035	≥0.015
DH40	≤0.18	≤0.50	0.9~1.6	≤0.035	≤0.035	≥0.015

 

The following are Chinese standards applicable to shipbuilding steel plates in addition to GB/T 712 - 2022:

 

Standards related to chemical composition
GB/T 223 series standards: such as GB/T 223.5 - 2008 "Iron and Steel - Determination of acid - soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method", GB/T 223.11 - 2008 "Iron, steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method", etc. These standards stipulate the analysis methods for various chemical elements in shipbuilding steel plates. By accurately measuring the content of elements such as silicon and chromium, the chemical composition of the steel plates is ensured to meet the corresponding quality requirements.

 

Standards related to welding
GB/T 985.1 - 2008 "Recommended bevel shapes for gas welding, manual metal arc welding, gas - shielded arc welding and high - energy beam welding": During the manufacturing process of shipbuilding steel plates, welding is required. This standard stipulates the appropriate bevel shapes for different welding methods to ensure the quality and strength of the welded joints. A reasonable bevel design helps improve welding efficiency and reduce welding defects, which is crucial for the welding construction of shipbuilding steel plates.
GB/T 985.2 - 2008 "Recommended bevel shapes for submerged arc welding": This standard specifically recommends the corresponding bevel design for submerged arc welding. Submerged arc welding is widely used in the welding of shipbuilding steel plates. This standard provides detailed bevel parameters for the welding of shipbuilding steel plates, making the welding process more standardized and ensuring that the welded steel plate structure can meet the usage requirements of the ship under complex working conditions.

 

Standards related to non - destructive testing
GB/T 2970 - 2016 "Ultrasonic testing method for thick steel plates": In the quality inspection of shipbuilding steel plates, non - destructive testing is an important part. This standard stipulates the equipment, testing methods, defect evaluation and other aspects of ultrasonic testing for thick steel plates. Through ultrasonic testing, internal possible defects such as cracks and inclusions can be detected without destroying the structure of the steel plate, thus ensuring the quality and reliability of the shipbuilding steel plate.
GB/T 3323 - 2005 "Radiographic examination of fusion - welded joints in metals": This standard is mainly used for radiographic testing of welded joints of shipbuilding steel plates. Radiography can clearly show the defect situation inside the welded joints, which is very effective for detecting minor defects and evaluating the welding quality, and helps ensure the quality and safety of the welded parts of the shipbuilding steel plate.

 

 

 

 

 

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 LR Shipbuilding Steel Plate LR AH36,LR DH36,LR EH36,LR FH36 Marine 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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