THY-A309LQ (E309LT1-1)
E309LT1-1 Stainless Steel Flux-Cored Wire | Extra-Low Carbon
Certificates:
ABS
CCS
DNV
BV
Application
- Shipbuilding
- Pressure Vessel
- Energy Industry
- Heavy Machinery
DETAILS
THY-A309LQ (E309LT1-1) is a rutile-type C1 gas-shielded extra-low carbon stainless steel flux-cored wire. Featuring high ferrite content and low crack sensitivity, it offers all-position capability ideal for joining stainless steel to carbon or low-alloy steel and buffer layer cladding before 308-series overlay.
Features
- Rutile-type slag system optimized for 100% CO₂ (C1) gas shielding
- Extra-low carbon content coupled with high ferrite structure for low crack sensitivity
- Exceptional all-position welding performance with a stable arc and easy slag removal
- High deposition efficiency and fast travel speeds for increased fabrication productivity
Typical Applications
- Dissimilar metal joining between stainless steel and carbon steel or low-alloy steel
- Buffer layer (underlay) welding on stainless steel clad plate surfaces
- First-pass/buffer layer welding prior to surfacing 308-series stainless steel on carbon steel
- Transition joints in chemical equipment, pressure vessels, and structural fabrications
Welding Positions
- PA / PB / PC / PD / PE / PF
WARNING
- Use DC⁺ only.
- Maintain wire extension at 20 mm and shielding gas flow rate at 20–25 L/min.
- Keep interpass temperature below 120°C (250°F).
| Test Item | Rm (MPa) | A （%） |
|---|---|---|
| Requirement | ≥520 | ≥25 |
| Typical Result | 548 | 32 |
| Element | C | Mn | Si | S | P | Cr | Ni | Mo | Cu |
|---|---|---|---|---|---|---|---|---|---|
| Requirement (%) | ≤0.04 | 0.5-2.5 | ≤1.0 | ≤0.030 | ≤0.04 | 22.0-25.0 | 12.0-14.0 | ≤0.75 | ≤0.75 |
| Typical Result (%) | 0.03 | 1.49 | 0.62 | 0.005 | 0.028 | 22.70 | 12.87 | 0.11 | 0.03 |
| Diameter (mm) | 1.2 | 1.6 |
|---|---|---|
| Current (A) | 140-240 | 200-300 |