AWS A5.9 ER309LSi
ASME SFA 5.9 ER309LSi
ER309LSi has a higher level of silicon than ER309L combined with a carbon content lower than ER309. The increased silicon level provides better arc stability and a smoother bead appearance while an average 02% carbon level reduces carbide precipitation. Typical applications
would include those of ER309 and ER309L.
TYPICAL WIRE CHEMISTRY (%)