1. Q550D steel is a kind of steel with specific yield strength and quality, which is mainly used in important structural parts, construction machinery and mining steel structural parts that require high strength and low temperature resistance. The grade of this steel is composed of three parts: the Chinese pinyin letter representing the yield strength, the yield strength value and the quality grade symbol, such as Q550D. The quality grade of Q550D steel is D, with high yield strength and good mechanical properties, which can meet the needs of various complex and demanding application scenarios.
2. In practical applications, the performance of Q550D steel is very good, especially in low temperature environment. Due to its excellent strength and toughness, Q550D steel is widely used in the manufacture of high-strength structural parts in extremely cold regions, such as bridges, construction, ships, and machinery. In addition, due to its high strength and wear resistance, Q550D steel is also widely used in the manufacture of steel structural parts of mining machinery and construction machinery, such as excavators, loaders, and mining trucks.
3. In addition to the application in low-temperature environment and high-strength structural parts, Q550D steel also has good welding performance and processing performance. This steel has excellent welding properties and is able to meet the requirements of various welding processes, and there will be no obvious deformation or cracks after welding. In addition, Q550D steel also has good machinability, and can easily perform machining operations such as cutting, bending, and forming, further increasing its application range and value.
Q550D steel is a high-quality, high-performance steel with a wide range of application prospects and value. With an in-depth understanding of its properties and applications, we can better leverage this material to meet the needs of complex and demanding applications and drive innovation in related industries.
Fourth, the grade representation method: S590Q Q550D WQ590D wh70q AH70DBD steel grade and Q690D similar by the Chinese pinyin letter representing the yield strength, the yield strength value, the quality grade symbol three parts, such as: Q550D, wherein: Q - the yield strength of the steel "yield" word "yield" Chinese pinyin first letter; 550—yield strength value, unit mpa; D—The quality grade is D (the grades are divided into C, D, E). When the demander needs the steel plate to have the performance in the thickness direction, the symbol representing the performance level in the thickness direction (Z direction) is added after the grade specified above, for example: Q550D-Z15.
Fifth, the material specification thickness * width * length (mm) weight (tons) name Q550D8 * 1500-4200 * 6000-18800mm105326T quenched and tempered high-strength steel plate Q550D10*1500-4200*6000-18800mm95164T quenched and tempered high-strength steel plate Q550D15*1500-4200*6000-18800mm82316T quenched and tempered high-strength steel plate Q550D20*1500-4200*6000-18800mm135314T quenched and tempered high-strength steel plate Q550D25*1500-4200*6000-18800mm145672T quenched and tempered high-strength steel plate Q550D30*1500-4200*6000-18800mm182317T quenched and tempered high-strength steel plate Q550D35*1500-4200*6000-18800mm163976T quenched and tempered high-strength steel plate Q550D40*1500-4200*6000-18800mm286362T quenched and tempered high-strength steel plate Q550D45*1500-4200*6000-18800mm257148T quenched and tempered high-strength steel plate Q550D50*1500-4200*6000-18800mm281446T quenched and tempered high-strength steel plate Q550D55*1500-4200*6000-18800mm348364T quenched and tempered high-strength steel plate Q550D60*1500-4200*6000-18800mm492347T quenched and tempered high-strength steel plate Q550D65*1500-4200*6000-18800mm334337T quenched and tempered high-strength steel plate Q550D70*1500-4200*6000-18800mm286349T quenched and tempered high-strength steel plate Q550D75*1500-4200*6000-18800mm176524T quenched and tempered high-strength steel plate Q550D80*1500-4200*6000-18800mm276823T quenched and tempered high-strength steel plate Q550D85*1500-4200*6000-18800mm285694T quenched and tempered high-strength steel plate Q550D90*1500-4200*6000-18800mm176246T quenched and tempered high-strength steel plate Q550D95*1500-4200*6000-18800mm97349T quenched and tempered high-strength steel plate Q550D100*1500-4200*6000-18800mm107937T quenched and tempered high-strength steel plate Q550D110*1500-4200*6000-18800mm1086t quenched and tempered high-strength steel plate