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S355J2WP seaport buildings used steel, Q345qD and Q345qDNH steel plates have good welding performance and low notch sensitivity. They are steel plates specially used for building railway or highway bridges. But Q345qDNH has good fatigue resistance, certain low temperature toughness and atmospheric corrosion resistance.
The cold working performance of S355J2WP seaport buildings used steel and so on steel structure engineering steel is good, which can ensure that the steel will not crack or brittle fracture during high-temperature processing, and will not have a great impact on strength, plasticity and toughness due to processing. The durability of S355J2WP seaport buildings used steel and so on steel structure engineering steel is good. Durability refers to the service life of steel structure. The main factor affecting the service life of steel is the poor corrosion resistance of steel, followed by the deterioration of mechanical properties of steel under long-term load, repeated load and dynamic load.
Advantages of S355J2WP seaport buildings used steel: 1. Steel purity: Wugang can produce high purity molten steel with P 0.010%, S 0.005%, N70ppm, O15ppm, H2ppm, and 20ppm total inclusions in the steel. 2. Good toughness and weldability. 3. The heat treatment technology: normalizing, quenching, tempering, tempering and other heat treatment processing can be carried out on the steel plate as required. 4. Significantly improve the plasticity and impact toughness of steel, and improve the anisotropy of steel.
Penetration testing technology is only suitable for detecting surface defects. It uses penetrant to apply on the surface of the S355J2WP seaport buildings used steel steel plate, then wipes the excess penetrant with the cleaning solution, and then smears the developer. The penetrant remaining in the defect is adsorbed by the developing material, so as to observe the shape of the defect and determine the type of defect. This S355J2WP seaport buildings used steel method requires multiple wipes before and after the inspection, the process is more cumbersome, and can not detect internal defects and rough and dirty steel plates.
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