THS-309/THT-309 (ER309)
ER309 Stainless Steel Welding Wire | High Temp Resistance
Application
- Shipbuilding
- Pressure Vessel
- Energy Industry
- Heavy Machinery
DETAILS
THS-309/THT-309 (ER309) is a 24%Cr-13%Ni stainless steel welding wire. Due to its high alloy content, it offers excellent high-temperature resistance, a stable welding arc, aesthetic bead appearance, and outstanding all-position usability.
Features
- 24%Cr-13%Ni high-alloy stainless steel chemical composition
- Excellent resistance to high-temperature oxidation, scaling, and thermal corrosion
- Stable welding arc with minimal spatter and smooth, attractive bead profile
- Superior all-position welding performance
Typical Applications
- Joining dissimilar metals, such as stainless steel to carbon or low-alloy steels
- High-temperature industrial equipment, furnace components, and heat exchangers
- Stainless steel cladding and buffer layer welding on mild steel
- Industrial kilns, incinerators, and thermal processing machinery
Welding Positions
- PA / PB / PC / PD / PE / PF
WARNING
- Rust, oil, moisture, and other contaminants must be removed from the weld zone before welding.
- Shielding gas: Ar + (1%–3%) O₂ is recommended for THS-309, and pure Ar for THT-309.
| Test Item | Rm (MPa) | A （%） |
|---|---|---|
| Typical Result | 605 | 36 |
| Element | C | Mn | Si | S | P | Ni | Cr | Mo | Cu |
|---|---|---|---|---|---|---|---|---|---|
| Requirement (%) | ≤0.12 | 1.00-2.50 | 0.30-0.65 | ≤0.020 | ≤0.025 | 12.00-14.00 | 23.00-25.00 | ≤0.75 | ≤0.75 |
| Typical Result (%) | 0.06 | 2.12 | 0.42 | 0.012 | 0.018 | 13.20 | 24.10 | 0.03 | 0.03 |