Some Properties of Fe--0-50Ni--0-15Mn Alloy Simulated Cast Iron Weld Metal Composition

The optimum welding electrode which has an adequate composition for cast iron welding is sought. Fe--(0-50)Ni--(0-15)Mn alloys simulating the compositon of cast iron weld metal were melted and cast into four kinds of molds to examine solidification temperature, tensile strength, shrinkage length, and thermal expansion coefficient. Because of the changing size of Cu mold for examining tensile strength, the cooling curves of the tensile test specimens were changed to a similar curve to that of the implant test of cast iron pre-heated to 423K. From the results obtained, it is concluded that the adequate composition range of the cast iron weld metals is Fe--(36-40)Ni--(6-8)Mn. For 30% penetration rate, these figures are Fe--(51-57)Ni--(8-12)Mn electrode. Graphs, Photomicrographs. 9 ref.--AA