THS-309L/THT-309L (ER309L)
ER309L Stainless Steel Welding Wire | Extra-Low Carbon
Application
- Shipbuilding
- Pressure Vessel
- Energy Industry
- Heavy Machinery
DETAILS
THS-309L/THT-309L (ER309L) is a 24%Cr-13%Ni stainless steel welding wire. Featuring high alloy content and extra-low carbon, it delivers excellent high-temperature resistance, superior corrosion resistance, a stable arc, and smooth, all-position welding performance.
Features
- 24%Cr-13%Ni extra-low carbon austenitic stainless steel formulation
- High alloy composition provides excellent high-temperature scaling and heat resistance
- Low carbon content minimizes carbide precipitation and maximizes intergranular corrosion resistance
- Stable arc performance with minimal spatter, aesthetic weld bead appearance, and easy slag removal
Typical Applications
- Dissimilar metal joining, such as stainless steel to carbon steel or low-alloy steel
- Buffer layer cladding on mild/carbon steel prior to 304L stainless overlay
- High-temperature structural parts, heat exchangers, industrial kilns, and furnace components
- Chemical processing equipment, pressure vessels, and industrial piping systems
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-309L, and pure Ar for THT-309L.
| Test Item | Rm (MPa) | A （%） |
|---|---|---|
| Typical Result | 580 | 35 |
| Element | C | Mn | Si | S | P | Ni | Cr | Mo | Cu |
|---|---|---|---|---|---|---|---|---|---|
| Requirement (%) | ≤0.030 | 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 (%) | 0.021 | 1.66 | 0.48 | 0.011 | 0.019 | 13.20 | 24.10 | 0.02 | 0.010 |