What industries are medium and heavy steel S690QL cutting used in

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The toughness index of Q345B steel should be tested by impact test at 20 ℃. Although the strength of Q345B steel and Q345A steel are the same, the S / P control of Q345B steel is more strict, and the ambient temperatures of steel S690QL, Q345B steel and Q345A steel are different. The cold impact test refers to the impact test at a certain temperature to obtain the energy consumed by punching the specimen. The more energy consumed, the higher the toughness of the material. Q345A is not subject to impact test. So Q345B steel is better than Q345A steel.

steel S690QL, 30CrMnSiA steel has good machinability, small processing deformation and good fatigue resistance. If 30CrMnSiA steel is used to make a tool, it is processed to the tool shape by rough machining. Mill the cutting edge with a cemented carbide milling cutter and polish it with a polishing machine. There should be no problem for the surface roughness reaching 3.2. 30CrMnSiA steel has high strength, sufficient toughness and good hardenability after quenching and tempering. After quenching and tempering, 30CrMnSiA steel can be used for grinding wheel shafts, gears and sprockets.

steel S690QL, Q345C steel plate is a kind of weldable low carbon engineering structure material, which is generally produced by continuous rolling mill. The carbon content of Q345C steel plate is less than 0.25%. The yield strength σ0.2 of Q345C steel plate is 300- 800MPa and the yield ratio is 0.65- 0.95. Q345C steel plate has excellent low temperature toughness. That is mainly owe to the solid solution of alloy elements (Mn, Si, Al, Cr, etc.), grain refinement (Nb, V, Ti, etc.), precipitation hardening (Nb, V, Ti, etc.), phase transformation strengthening (Mn, Si, Mo, etc.), and controlled rolling and controlled cooling, etc. new technologies.

2020 October stock steel S690QL product: 8*1800*10950, 16*2150*10950, 70*2270*7350, 6*2200*10000, 20*3200*4400, 20*2280*5800, 20*2100*10800, 70*2270*7000, 12*2050*5100, 20*3200*4400, 12*2000*11850, 14*2940*9600, 20*2150*10000, 70*2260*7700, 6*1950*10000, 12*2000*11850, 6*2200*10000, 14*2510*10950, 16*2150*10000, 70*2260*7240, 20*3200*4400, 6*2200*10000,20*2100*7000, 12*2500*8000, 20*2100*10750, 35*2200*6800, 12*2000*11850, 20*2100*7000, 31.2*2950*9380.

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