Description
Characteristics:
It is a ferrite stainless steel with good ductility in heat-treated condition. It is used for welding 17%Cr steel, overlays and thermal spraying.
Applications:
It is suitable for welding of 409 and 430 stainless steel types. Typical applications are used for automotive exhaust fabricators such as front pipe, bellows, flange.
Notes on Usage:
1. For TIG process, use DC(-) current , Argon Shield and Tungsten Electrode.
2. For MIG process, use Spray Transfer or Short Circuit Transfer mode.
3. 98%Argon – 2%O₂ shielding gas is recommended in MIG process.
4. Preheat of the joint to minimum of 150°C before welding.
Classification:
AWS A5.9 ER409Nb
Typical chemical composition of weld metal (wt%)
| C | Cr | Mn | Si | Ni | Fe |
| 0.06 | 16.2 | 0.42 | 0.34 | 0.38 | Bal. |
Typical mechanical properties of weld metal
| TS N/mm2 | EL % | PWHT |
| 530 | 25 | 780°C x2hr |
Sizes available
| TIG Rods(mm) | 1.6 | 2.0 | 2.4 | 3.2 |
