R107
R107 is a pearlite heat-resistant steel welding electrode with low-hydrogen sodium type coating, which contains 0.5% Mo. It adopts DCEP connection method and is permitted for all positions welding. The work piece should be properly preheated and heat treated after welding according to its structural characteristics.
The product is applicable for welding boiler pipes and general low alloy steel with working temperature below 510℃, such as 15Mo.
Chemical components of deposited metal (%)
Test item |
C |
Mn |
Si |
S |
P |
Mo |
| Example value | 0.056 | 0.65 | 0.38 | 0.010 | 0.018 | 0.50 |
Mechanical properties of deposited metal (preheated at 605-645℃×1h)
Test item |
Rm (MPa) |
ReL/Rp0.2 (MPa) |
A (%) |
| Example value | 570 | 480 | 28 |
X-ray flaw detection requirements: Level I
Reference current (DC )
Welding electrode diameter (mm) |
Φ2.5 |
Φ3.2 |
Φ4.0 |
Φ5.0 |
| Welding current (A) | 60-90 | 90-120 | 140-180 | 170-210 |
1. Before welding, the welding electrode should be baked at 350℃ for 1 hour for ready use.
2. Impurities such as rust, oil stain and moisture must be removed from the work piece before welding.
2. Impurities such as rust, oil stain and moisture must be removed from the work piece before welding.
