Description
Characteristics:
LFC-70 is a metal cored wire suitable for used with Ar/CO₂ for mild steel and 490 N/mm² high tensile steel, its deposition rate is 10-30% higher than a solid wire. Multi-layer welding can be performed without removing slag.
Applications:
It is suitable for the multi-layer welding of thick plate welding in such applications as steel structure, bridges, shipbuilding, vehicles, storage tanks, etc.
Notes on Usage:
- Use DC(+) polarity.
- Maintain inter-pass temperature under 150°C for multi-layer welding.
- Trailer Shield is required to ensure the weld pool completely shield by 75-80%Ar,25- 20%CO₂ gas until solidification is complete and no porosity problem.
Classification:
AWS A5.18 E70C-3M/6M
EN EN758 T 42 2 PM1 H10
JIS Z3313 YFW-A50DR
Welding Position:
Typical chemical composition of weld metal (wt%)
| C | Mn | Si | P | S |
| 0.04 | 1.50 | 0.63 | 0.012 | 0.010 |
Typical mechanical properties of weld metal
| YP N/mm2 | TS N/mm2 | EL % | IV J | |
| 545 | 595 | 28 | -20°C | -30°C |
| 57 | 45 | |||
Sizes and recommended current range ( DC+)
| Diameter (mm) | 1.2 | 1.6 | ||
| Welding Position | F | HF | F | HF |
| Voltage(Volt) | 25-35 | 25-38 | 25-35 | 28-38 |
| Current(Amp) | 150-300 | 180-300 | 220-400 | 270-440 |
| Stick out(mm) | 15-25 | 15-25 | 20-30 | 20-30 |
| Flow rate(l/min) | 15-25 | 15-25 | 20-25 | 20-25 |
| Weight per spool(kg) | 15 | 15 | ||
