Description
Characteristics:
LFC-77 is a metal cored wire. It feature smooth spray arc, low slag volume, low spatter, low fume emission,good penetration, high resistance to porosity, and excellent low temperature impact toughness under -40°C.
Applications:
It is suitable for the multi-layer welding onheavy plate thickness, steel structure, and storage vessels.
Notes on Usage:
1. Use DC(+) polarity.
2 .Shielding gas should be 75-80%Ar+25-20%CO₂.
Classification:
AWS A5.18 E70C-6M
EN EN758 T 46 4 MM3 H5
JIS Z3313 YFW-A502R
Welding Position:
Typical chemical composition of weld metal (wt%)
| C | Mn | Si | P | S |
| 0.06 | 1.45 | 0.54 | 0.015 | 0.005 |
Typical mechanical properties of weld metal
| YP N/mm2 | TS N/mm2 | EL % | IV -40°C J |
| 580 | 630 | 24 | 65 |
Sizes and recommended current range ( DC+)
| Diameter (mm) | 1.2 | 1.6 |
| Voltage(Volt) | 26-34 | 28-35 |
| Current(Amp) | 200-320 | 250-350 |
| Stick out(mm) | 15-25 | 15-25 |
| Flow rate(l/min) | 20-25 | 20-25 |
| Weight per spool(kg) | 15 | 15 |
