What is pipe S690QL equivalent steel in GB standard

After the steel plate is produced from the original factory, it will pass through a series of transportation and storage links and then be delivered to the processing workshop. During this period of time, the steel plate surface will contact with the air continuously, which will inevitably produce a layer of oxide skin. The oxide skin is a difficulty in the treatment process. It has high melting point, is not easy to burn and dissolve, increases preheating time, reduces cutting speed. Therefore, the surface of the pipe S690QL plate should be derusted before cutting.

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The alloying principle of low alloy high strength steel plate mainly uses solid volume strengthening, fine grain strengthening and precipitation strengthening produced by alloy elements to improve the strength of low alloy high strength steel plate, pipe S690QL. At the same time, the effect of fine grain strengthening on the reduction of ductile brittle transition temperature of low alloy high strength steel platel is used to offset the adverse effect of carbon nitride precipitation strengthening on the rise of ductile brittle transition temperature of steel, so that low alloy high strength steel plate can obtain high strength while maintaining good low temperature performance.

5mm 6mm hot rolled thin plates product pipe S690QL inventory:
5*3000*8000, 5*3000*8400, 6*2800*9390, 5*2800*11880, 6*2614*7050, 5*3000*11650, 5*3000*9900, 5*3000*8300, 6*2854*8200, 5*2790*10500, 6*2854*9680, 5*3000*8800, 6*2854*7480, 6*2614*9250, 5*2990*10470, 5*3000*8600, 6*2800*9390, 6*2854*8500, 5*2990*10400, 5*2990*9000, 6*2854*6480, 6*2854*6800, 5*3000*7550, 6*2854*9390.

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