Golden Bridge
Golden Bridge ER80S-B2 (JQ-MG55-B2) MIG Welding Wire
Golden Bridge ER80S-B2 (JQ-MG55-B2) MIG Welding Wire
SKU:JQ-MG55-B2-040-02.2
JQ-MG55-B2
JQ-MG55-B2 is a mixed gas shielded solid welding wire for heat-resistant steel, which has excellent welding performance with smooth arc, low spatter level, good wire feeding behavior and optimal bead appearance. It is permitted for all positions welding, and the deposited metal has excellent comprehensive mechanical properties.
The product is applicable for welding 1.25%Cr-0.5%Mo pearlite heat-resistant steels with working temperature below 520℃, such as SA335P11, SA335P12, etc. It is mainly used in the fields such as boiler pipes, pressure vessels, petrochemical industry, and conventional thermal power stations.
Chemical composition of welding wire (%)
Item |
C |
Mn |
Si |
S |
P |
Ni |
Mo |
Cr |
Cu |
| Example value | 0.08 | 0.50 | 0.45 | 0.006 | 0.015 | 0.02 | 0.50 | 1.25 | 0.15 |
Mechanical properties of deposited metal (Ar+2%O2, heat treatment temperature: 620±15℃×60+150min)
Test item |
Rm (MPa) |
ReL/Rp0.2 (MPa) |
A (%) |
| Example value | 648 | 537 | 21 |
Reference specification (DC+)
Wire specification（mm） |
Welding current（A） |
Gas flow（L/min） |
| Φ1.0 | 50~220 | 15~20 |
| Φ1.2 | 80~350 | 15~25 |
| Φ1.4 | 120~400 | 20~25 |
| Φ1.6 | 170~550 | 20~25 |
1. The content of impurities in shielding gas should be strictly controlled to ensure the gas purity.
2. The dry elongation should be controlled within 15-20mm.
2. The dry elongation should be controlled within 15-20mm.
