Chemical Composition

 

The chemical composition of LR AH50/LR A50 shipbuilding steel plate is primarily composed of carbon (C), manganese (Mn), phosphorus (P), sulfur (S), silicon (Si), and trace amounts of copper (Cu), chromium (Cr), and nickle (Ni). Its maximum carbon content is 0.21%, and the maximum manganese content is 2.5%. Phosphorus and sulfur contents are less than or equal to 0.035%. Copper content should be no more than 0.35% while chromium and nickel content should be less than 0.2%.

 

Mechanical Properties

 

LR AH50/LR A50 shipbuilding steel plate has excellent mechanical properties, including high yield and tensile strengths and good elongation. Its minimum yield strength is 345 MPa, and its minimum tensile strength is 70 ksi (480 MPa). The elongation at break ranges from 17%-21%. The steel plate also has good impact toughness, as it can withstand Charpy V-notch impact tests at -50°C/-58°F.

 

Heat Treatment

 

LR AH50/LR A50 shipbuilding steel plate is typically delivered in a normalized or controlled-rolling condition. Normalizing is a heat treatment process that involves heating the steel to a temperature above the critical point and allowing it to cool in air. It results in the uniform distribution of carbides and phosphides and improves the steel's mechanical properties. Controlled-rolling is a technique for controlling the rolling temperature and cooling rate during the steel plate production process, which helps to enhance the plate's microstructure and reduce its internal stress.

 

Size Range

 

LR AH50/LR A50 shipbuilding steel plate is available in various thicknesses (6-100mm) and widths (1500-3200mm) and can be customized according to customers' specific requirements.

 

Impact Tests

 

LR AH50/LR A50 shipbuilding steel plate can withstand Charpy V-notch impact tests at -50°C/-58°F with a minimum energy absorption of 41J.

 

Primary Application Scenarios

 

LR AH50/LR A50 shipbuilding steel plate is mainly used in the construction of large-scale ships, offshore drilling platforms, and other marine engineering applications that require high strength and excellent toughness.

 

TJC Steel Supply Case

 

TJC Steel, one of the world's largest steel plate suppliers, has provided LR AH50/LR A50 shipbuilding steel plate to various customers worldwide. For example, they supplied 200 metric tons of LR A50 shipbuilding steel plates to a customer in the Philippines for the construction of offshore drilling platforms.

 

Conclusion

 

The LR AH50/LR A50 shipbuilding steel plate is a high-strength, tough, and weldable material that plays a critical role in marine engineering. Its excellent mechanical properties and versatile applications make it a popular choice for shipbuilding, offshore drilling platforms, and other marine engineering projects. With TJC Steel's reliable supply and excellent customer service, it is an excellent choice for construction professionals looking for high-quality steel plate materials.