Specifications:
AWS A5.9
AWS Class ER309LSi
ASME SFA 5.9
UNS S30988
Description:
ER309LSi is similar to ER309L except it contains a higher silicon content which gives it improved wetting action. This alloy is good for general purpose GMAW welding, providing a smooth weld profile in welding applications of stainless steel plate and sheets. This alloy could have a somewhat higher crack sensitivity than other alloys with a lower silicon content, if the dilution of the base metal creates a fully austenitic weld or a low ferrite. ER309LSi contains a lower carbon content which allows for a reduction in the likelihood of intergranular carbide precipitation, and it has a higher resistance to intergranular corrosion. ER309LSi is best used in the welding of food service applications and beverage tanks.
Tensile Strength: 89,900 psi
Yield Strength: 60,500 psi
Elongation: 35%
Available in multiple sizes and diameters
Chemical Composition (Wt%):
Si Mn Cu Mo S Ni Cr P C
0.65-1.0 1.0-2.5 0.75 0.75 0.03 12.0-14.0 23.0-25.0 0.03 0.03
