Centrifugal cast iron pipe is made of ductile iron. In many occasions they required arc welding and the welding of ductile iron has many inherited technical problems. In this research many common arc welding methods and filler metals have been tested. Evaluation of the test results has shown that by using 55% Ni-Fe filler metal with relatively low welding heat input the best welding result can be achieved.
Ductile iron Centrifugal casting Iron pipe Arc welding