The quality standards of LR AH36 steel plate is usually related to classification societies and international standards, and are specifically described as follows:
1. Chemical composition requirements: including the restriction range of carbon content, sulfur content, phosphorus content and other elements to ensure that the chemical composition of the steel plate meets the specified standards.
2. Mechanical performance requirements: Covering tensile strength, yield strength, elongation, impact toughness and other indicators to ensure that the strength, plasticity and toughness of the LR AH36 steel plate meet the design requirements.
3. Metallographic structure requirements: It is stipulated that LR AH36 steel plate should have a certain metallographic structure, which usually requires fine and uniform grains and no obvious inclusions and defects.
4. Dimensions and surface quality: Specify the tolerance range of thickness, width, and length of LR AH36 steel plate. The surface should be flat and smooth, without defects such as cracks, wrinkles, and scratches.
5. Welding performance: LR AH36 steel plate is required to have good welding performance, including the reliability, strength and corrosion resistance of the welded joint.
6. Dehydrogenation treatment: High-strength steel plates may require dehydrogenation treatment to reduce the risk of brittle fracture.
7. Control thickness error: Specify the thickness error range of steel plates to ensure the accuracy and consistency of the hull structure.
8. Comply with classification society certification requirements: Steel plate production is required to comply with the certification standards and requirements of specific classification societies (such as LR, ABS, DNVGL, etc.) to ensure that products comply with international navigation agreements and specifications.
The detailed description of these quality standards ensures that the quality of LR AH36 steel plates can meet the requirements of ship engineering and ensure the safety and reliability of ship structures.
