Golden Bridge
Golden Bridge ER70S-4 (JQ-MG50-4) MIG Welding Wire
Golden Bridge ER70S-4 (JQ-MG50-4) MIG Welding Wire
SKU:JQ-MG50-4-030-02.2
JQ.MG50-4
JQ-MG50-4 is a gas shielded solid welding wire for low alloy steel, which has excellent welding performance with optimal bead appearance and is permitted for welding in all positions. The deposited metal has excellent comprehensive mechanical properties.
The product is applicable for welding various carbon steel and low alloy steel with 500MPa tensile strength grade, commonly applied in the fields such as bridges, construction machinery etc..
Chemical composition of welding wire (%)
Item |
C |
Mn |
Si |
S |
P |
Ni |
Cr |
Mo |
V |
Cu |
Example value | 0.085 | 1.05 | 0.72 | 0.014 | 0.014 | 0.005 | 0.018 | 0.006 | 0.003 | 0.11 |
Mechanical properties of deposited metal
Test item |
Rm (MPa) |
ReL/Rp0.2 (MPa) |
A (%) |
KV2 (J) -30℃ |
Example value | 540 | 450 | 30 | 93, 87, 95 |
Reference specification (DC+)
Specification of welding wire (mm) |
Welding current (A) |
CO2 gas flow (L/min) |
Φ0.8 | 50~100 | 15 |
Φ1.0 | 50~220 | 15~20 |
Φ1.2 | 80~350 | 15~25 |
Φ1.6 | 170~550 | 20~25 |





