The effect of welding procedure on ANSI/AWS A5.29-98 E81T1-Ni1 flux cored wire all-weld metal

H. G. SVOBODA, N. M. RAMINI DE RISSONE, LUIS A. DE VEDIA, E. SURIAN

WELDING JOURNAL

American Welding Society

Lugar: Miami; Año: 2004 vol. Nov p. 301 - 307

0043-2296

The objective of this work was to study the effects that different shielding gases (CO2 and a mixture of 80% Ar/20%CO2),  welding position (flat and uphill), arc energy (1.0 vs. 1.9 kJ/mm) and number of passes per layer (two and three) have on  the all-weld-metal microstructure and mechanical properties of an ANSI/AWS A5.29-98 E81T1-Ni1 flux cored wire, 1.2  mm diameter. Hardness, tensile, and impact tests were used to assess the mechanical properties, and quantitative metallographic analyses were performed to identify the resulting microstructures. In general, ANSI/AWS A5.29-98  81T1-Ni1 (E81T1-Ni1M) mechanical requirements were comfortably satisfied under Ar/CO2, but significant variations were found with different welding procedures. These variations have been rationalized in terms of the microstructure and chemical composition of the weld deposits. The strength and toughness of welds produced with Ar/CO2 were quite sensitive to minor changes in heat input, while the CO2 welds exhibited little deviation in these properties with nearly identical changes in heat input.