ER409Nb
Alloy Type: A5.9, STAINLESS STEEL Bare, Cored and Stranded Electrodes
ER409Nb is a ferritic stainless steel welding alloy used to weld types 409 and 409Ti base metals. The addition of niobium leads to a preferential reaction with carbon which interrupts chromium from forming carbides. This improves corrosion resistance, increases strength at high temperatures, and promotes ferritic microstructure.
| AWS Class: ER409Nb | Certification: AWS A5.9/ A5.9M:2006 |
| Alloy: ER409Nb | AWS/ASME SFA A5.9 |
| Welding Position:
F, V, OH, H |
Current:
MIG-DCEP TIG-DCEN |
Typical Properties (as welded)
| Yield, kpsi: | 50 |
| Tensile Strength, kpsi: | 67 |
| Elongation%, min: | 26 |
Typical Wire Chemistry as per AWS A5.9 (single values are maximum)
| C | Cr | Ni | Mo | Mn | Si | P | S | Cu | Element | Amount |
| 0.08 | 10.5-13.5 | 0.6 | 0.50 | 0.8 | 1.0 | 0.04 | 0.03 | 0.75 | Nb | 10XC min/0.75max |
| Typical Welding Parameters | |||||
| Diameter | Process | Volt |
Amps |
GAS | |
| in | (mm) | ||||
| .035 | (0.9) | GMAW | 26-29 | 160-210 | 98% Argon/2% Oxygen or 97% Argon/3% Oxygen |
| .045 | (1.14) | GMAW | 28-32 | 180-250 | 98% Argon/2% Oxygen or 97% Argon/3% Oxygen |
| 1/16” | (1.6) | GMAW | 29-33 | 200-280 | 98% Argon/2% Oxygen or 97% Argon/3% Oxygen |
| Diameter | Process | Volt |
Amps |
GAS | |
| in | (mm) | ||||
| 1/16” | (1.6) | GTAW | 14-18 | 90-130 | 100% Argon |
| 3/32” | (2.4) | GTAW | 15-20 | 120-175 | 100% Argon |
| 1/8” | (3.2) | GTAW | 15-20 | 150-220 | 100% Argon |