heavy steel sheet S690QL standard pdf

The company is a large heavy steel sheet S690QL steel supplier and exporter specializing in steel coil, steel plate, steel tube and section steel. The company has always put service and quality first, offered reasonable price, taken small profits and quick turnover as the principle, honest and trustworthy as the purpose. The success of the company is not only the hard work and wisdom of all the employees of the company, but also the deep love of our customers. We will continue to achieve new leaps and create greater brilliance of the heavy steel sheet S690QL enterprise, and make our own contribution to the development of the world economy.

Ship plate is a kind of steel plate used in shipbuilding, including thin plates and medium-thick plates. The China Classification Society rules divide steel plates into “ABDE” four quality levels, namely CCSA, CCSB, CCSD, and CCSE. There are many main materials for ship plates, such as heavy steel sheet S690QL, stainless steel, galvanized steel, shipbuilding steel plates, wooden ship plates, etc. Each material is used in different places. Generally, those large cargo ships at sea use stainless steel plates. Otherwise, if the ship plates rust, it will not only pollute the sea but also affect the ship itself.

High strength steel is a kind of steel often used in engineering construction. With the improvement of technical level, the research and development of high strength steel in China has made remarkable achievements. The application of high strength steel heavy steel sheet S690QL in the construction field can reduce the steel consumption and building volume, and improve the building weight. That is one of the important reason why the high strength steel is so warmly welcomed nowadays.

Tempering includes high temperature tempering, medium temperature tempering and low temperature tempering. Tempering means to reheat the heavy steel sheet S690QL quenched steel to a certain temperature and then cool it in a certain way. Tempering can reduce or eliminate the internal stress produced by quenching, reduce the hardness and strength, and improve the ductility or toughness of steel. After heavy steel sheet S690QL quenching, the workpiece should be tempered in time, and the required mechanical properties can be obtained through the combination of quenching and tempering.

heavy steel sheet S690QL, S235JR VS S275JR VS S355JR plates in yield strength: For plate thickness ≤16mm, the min. yield strength of S235JR plates is 235 Mpa, S275JR plates is 275 Mpa, S355JR plates is 355 Mpa. The yield strength of S235JR S275JR S355JR plates reduces with the increasing of plate thickness. S235JR VS S275JR VS S355JR plates in tensile strength: For plate thickness 3-100mm, the tensile strength of S235JR plates is 360-510 Mpa, S275JR plates is 410-560 Mpa, S355JR plates is 470-630 Mpa. For plate thickness 100-150mm, the tensile strength of S235JR plates is 350-500 Mpa, S275JR plates is 400-540 Mpa, S355JR plates is 450-600 Mpa.

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