Five causes of cracks in 1.8940 EN 10025-6 high strength steel during quenching

The user of S355NC grade must make sure that his calculation, design and processing methods are appropriate for the 1.8940 EN 10025-6 high strength steel material. The forming process used must be suitable for the intended application and comply with the state-ofthe- art; it is of fundamental importance to the processing behaviour of this 1.8940 EN 10025-6 high strength steel steel grade.

BBNsteel prime quality thick plate 1.8940 EN 10025-6 high strength steel product stock: 31*1640*6150, 34*1460*4550, 34*2420*7300, 26*2800*5300, 32.5*3050*7000, 32*1600*4000, 36*1300*4500, 35*1300*4100, 26*2990*6000, 37*1600*8600, 32*2650*5500, 33*2550*6000, 34*2120*6100, 36*1500*6000, 45*1300*4000, 32*3300*6000, 40*1590*8000, 33*1750*6000, 33*1750*6000, 50*1800*6000, 65*2000*6000.

The company has new project in Peru. It is about more than 2000 tons 1.8940 EN 10025-6 high strength steel, LSAW steel pipes and large diameter pipe fittings, an repeat order for Peru Goverment. The fittings include Manhole, big Elbow, Bifurcation, etc. Since 2012 when we cooperated with the Peru Goverment to operate the hydropower project, they have repeat orders for us almost every year.

How to prevent 1.8940 EN 10025-6 high strength steel, steel plate cutting cracks? 1. Preheat the steel plate before cutting, and the preheating temperature depends on the quality grade and thickness of the steel plate. However, it needs to be heated evenly. 2. The cutting speed is reduced appropriately, but its reliability is not as good as preheating. It is suggested to preheat the cutting belt with flame gun cavitation several times before cutting, and the preheating temperature should reach about 180℃.