ER409
Class: ER409
AWS: A5.9
Conforms to Certification: AWS A5.9 | ASME SFA A5.9
Weld Process Used for Tig: (GTAW)
AWS Chemical Composition Requirements
C = 0.08 max
Cr = 10.5 – 13.5
Ni = 0.60 max
Mo = 0.50 max
Mn = 0.80 max
Si = 0.80 max
P = 0.03 max
S = 0.03 max
Cu = 0.75 max
Ti = 10 x C (min) – 1.5 (max)
Available Sizes
.030 x 36
.035 x 36
.045 x 36
1/16 x 36
3/32 x 36
1/8 x 36
3/16 x 36
5/32 x 36
Application
The nominal composition of ER409 weld metal is 12% chromium with Ti added as a stabilizer. This material often is used to weld bare metal of similar composition.
| Deposited Chemical Composition % (Typical) | ||
| C = 0.05 | Mo = 0.30 | P = 0.016 |
| Cr = 11.5 | Mn = 0.62 | S = 0.018 |
| Ni = 0.35 | Si = 0.48 | Cu = 0.16 |
| TI = 0.50 | ||
| Mechanical Properties (R.T.) | |
| Yield Strength | 50,500psi |
| Tensile Strength | 67,000psi |
| Elongation | 26% |
Deposited All Weld Metal Properties
Data is typical for ER409 weld metal deposited by Tig using 100% Argon as the shielding gas.
Recommended Welding Parameters |
|||
| GTAW “Tig Process” | |||
| Wire Diameter | Amps DCSP | Volts | Shielding Gas |
| .035 | 60-90 | 12-15 | Argon 100% |
| .045 | 80-110 | 13-16 | Argon 100% |
| 1/16 | 90-130 | 14-16 | Argon 100% |
| 3/32 | 120-175 | 15-20 | Argon 100% |
Note: Parameters for tig welding are dependent upon plate thickness and welding position.
Other shielding Gases may be used for Tig welding. Shielding gases are chosen taking Quality, Cost, and Operability into consideration.