Specifications:
AWS A5.9
AWS Class ER409Nb
ASME SFA 5.9
UNS S40940
Description:
ER409Nb is a filler wire that has a ferritic microstructure and is used to join similar base metals. This alloy has the addition of niobium, which creates niobium carbides and prevents chromium carbides, therefore giving ER409Nb a better resistance to corrosion. ER409Nb is typically used in the production of exhaust system parts such as mufflers and catalytic converters.
Tensile Strength: 67,000 psi
Yield Strength: 50,500 psi
Elongation: 26%
Available in multiple sizes and diameters
Chemical Composition (Wt%):
Note: Single values are maximum unless otherwise noted.
Si Mn Cu Mo S Ni Cr P C Nb + Ta
1.0 0.90 0.75 0.50 0.03 0.60 10.5-13.5 0.04 0.08 (10 x C) min - 0.75 max
