The　microstructure　and　mechanical　properties　of　the　deposited　metals　of　five　metal　cored　wires　for　welding　600-900　MPa　ultralow　carbon　bainitic　steels　were　investigated.　It　was　found　that　lowering　the　C　content　and　optimising　the　Mn,　Ni,　Mo　and　Cr　contents　of　the　deposited　metal　significantly　improved　the　strength　and　toughness.　At　the　lowest　strength　level　(627　MPa),　ferrite　dominated,　mainly　acicular　ferrite　and　proeutectoid　ferrite.　However,　at　the　highest　strength　level　(＞800　MPa),　bainite　dominated,　mainly　degenerate　upper　bainite　and　granular　bainite.　Good　strength　toughness　match　was　achieved　by　a　deposited　metal　having　an　interlaced　multiphase　microstructure　with　degenerate　upper　bainite　and　martensite　acting　as　main　strengthening　phases,　and　granular　bainite　and　acicular　ferrite　acting　as　toughening　phases.