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In this paper effects of welding on mechanical and microstructural characteristics of high-strength low-alloy steel joints is presented. Testing was done at models prepared with Vgroove butt joints that are done by two different w elding processes. Considered welding processes were done by MMA or MIG for root pass and MAG for other passes with related consumables. Experimentally determined basic mechan i al characteristics were put in correlation to relate ones that were numerically ca lcul ted. The experimentally obtained yield strength and tensile strength showed that welding p rocess MMA/MAG provide better mechanical properties then MIG/MAG. It is implicate d that selection of welding process at high-strength low-alloy steels is multi criterion a alysis. If only proper welding is obtained, applications of high-strength low-alloy steel are a dequate. Those applications caused specific problems related to its specific characteristics an d properties especially weldability. As welding processes can be analysed from different as pect , selection of specific welding process at high-strength low-alloy steel are more complex.

Effects of welding on mechanical and microstructural characteristics of high-strength low-alloy steel joints