Welding Nodular Iron. Welding of Ductile Iron with Ni-Fe-Mn Filler Metal A new filler metal system can be used with several welding processes to produce joints in ductile iron that match or exceed base metal properties up to 80000 psi 552 MPa BY T. Nodular spheroidal graphite cast iron.
Also because of its localized nature welding produces thermal stresses in the weld area. Braze welding can be used on nodular iron if some sacrifice of tensile strength can be tolerated. At this temperature the iron inside the metal gets stretched preventing it from cracking.
An experienced welder can weld nodular cast iron but there are some tricks to it.
Therefore welding of nodular cast iron likewise welding other cast irons requires special precautions to obtain optimum properties in the welded metal and the adjacent HAZ. The weld is made by depositing a series of small stringer weld beads at a low heat input to minimise the HAZ. Welding of Ductile Iron with Ni-Fe-Mn Filler Metal A new filler metal system can be used with several welding processes to produce joints in ductile iron that match or exceed base metal properties up to 80000 psi 552 MPa BY T. When welding any cast iron you will end up with a brittle martensitic structure even though the nodular iron is ductile.