Stainless steels
FERVEO INX 309LSi TIG
TIG rodCatalogue only
also as: solid wire
AWS class
ER 309 LSi
EN ISO class
G/W 23 12 L Si
Tensile strength (Rm)
600 MPa
Classification
| AWS class | ER 309 LSi |
|---|---|
| EN ISO class | G/W 23 12 L Si |
| Material no. (W.-Nr.) | 1.4332 |
Purpose
- TIG rod version of the low-carbon INX 309LSi wire — same use joining carbon/low-alloy steel to stainless, to 300°C.
Why it works
Same alloy as INX 309LSi MIG, as a TIG rod (DC-, I1 gas) — fine puddle control for root passes and thin sections.
Fields of application
- DIN 1.4583, 1.4710, 1.4729, 1.4740, 1.4825, 1.4828, 1.4878 (heat-resistant steels and castings).
- Intermediate layers and dissimilar-steel joining.
Chemical composition
| Element | Typical, % |
|---|---|
| C | 0.02 |
| Cr | 24.5 |
| Mn | 1.8 |
| Ni | 13.5 |
| Si | 0.85 |
Mechanical properties
| Tensile strength (Rm) | 600 MPa |
|---|---|
| Yield strength (Rp0.2) | 400 MPa |
| Elongation (A5) | 30 % |
| Impact energy (KV) | 65 J |
| Service temperature | −60 … 300 °C |
Process
| Polarity | DC− |
|---|---|
| Shielding gas | I1 |
Sizes and part numbers
| Ø | Request |
|---|---|
| 1 mm | |
| 1.6 mm | |
| 2.4 mm | |
| 3.2 mm |
Supply programme
boxes 5 kg
Cross-reference
| Replaces CN 23/12-IG (Böhler) | Direct replacement |
| Replaces OK Tigrod 309L (ESAB) | Direct replacement |
| Replaces OK Tigrod 309LSi (ESAB) | Direct replacement |
| Replaces TG-S309L (Kobelco) | Direct replacement |
| Replaces LNT 309LSi (Lincoln) | Direct replacement |
| Replaces NIC 309 L (Nicrotec) | Direct replacement |
| Replaces INERTROD 309LSi (Oerlikon) | Direct replacement |
| Replaces 24/12S (Selectarc) | Direct replacement |
| Replaces UTP A 6824 LC (UTP) | Direct replacement |
Equivalence refers to the classification (AWS / EN ISO), not to product identity. In applications with a qualified procedure (WPS), validate the substitution before use.
Base metals
1.45831.47101.47291.47401.48251.48281.4878
Advantages
- Corrosion resistant up to 300°C.
- Controlled TIG arc — suited to root passes.
Limitations
- High ferrite content in the deposit: risk of sigma-phase embrittlement under sustained exposure at 600–900°C — not recommended for critical structures in that range.