Baosteel has developed 80kg-grade easy-welding high-strength steel that realizes no-pre-heating welding. Baosteel has started the supply of the product in batches to customers.
Easy-welding high-strength steel is used in manufacturing of mechanical equipment used in coalmines, especially for making hydraulic support, which requires corrosion resistance, wear resistance, shock resistance, high strength, lightweight and easy processing.
Baosteel initiated research on no-preheating welding of 80kg grade easy-welding high-strength steel in 2010. The R&D group found a special way to solve the balance relationship between the strength and crack resistance of steel. They also focused on research for new mechanisms for strengthening steel.
A factory supplying machinery for use in coalmines measured and calculated that utilising the no-preheating welding of 80kg grade easy-welding high-strength steel provides cost savings on energy, manpower heating equipment and so on, totalling to approx. EUR 3.6M per year. Besides, it can also solve the working environment and environmental protection problems caused by preheating process, and put an end to the safety risk may brought by insufficient preheating.
