Welding of super bainitic and triplex structure steels was studied using AWS A5.5 E11018-M and AWS A5.4 E312-17 electrodes. The existence of martensitic structure at the heat affected zone encourages the occurrence of cold cracking at the HAZ in welding of both super bainitic and triplex steels. Using E312-17 electrode renders the occurrence of cold cracks at the heat affected zone of these steels. The tensile strength of welded joints using E11018-M electrode is higher than that of the pure weld metal of E11018-M electrode. This could be attributed to the dilution of weld metal from the base metal especially carbon content. The V– notch impact test results using E312-17 electrode were slightly higher than that obtained using E11018-M electrode. This could be attributed to the occurrence of cold cracks using E11018-M electrode in addition to the tough austenitic weld metal using E312-17 electrode.

Please login / register to post comments

news in steel

LKAB invests in pilot plants for phosphorus and rare earth metals

"We are investing 45 million kronor in pilot plants as part of a pre feasibility study to define a process that enables recycling of mine waste through innovative processing, producing critical raw materials. Lab tests conducted during the year confirmed that we can produce more phosphorus and rare earth metals than estimated," says President and Group CEO, Jan Moström.

Introducing Duroxite™ 200 overlay plate for preventing severe sliding wear

Duroxite™ 200 saves money and improves productivity in a wide range of applications through higher output and less maintenance.

SMS group supplies high-performance Compact Cold Mill to Marcegaglia

Marcegaglia Ravenna S.p.A. has contracted SMS group for the complete supply of a two-stand reversing cold mill of CCM® (Compact Cold Mill) design. Marcegaglia's head-quarters is located in Gazoldo degli Ippoliti, in the Mantua province in North Italy.

VCC® technology comes to Colombia

Ternium del Atlántico SAS, has placed an order with SMS group for the supply and installation of the VCC® technology (Vertical Compact Coiler) for its bar mill in Palmar de Varela, Barranquilla, Colombia.