ECuNi (187)
Alloy Type: A5.6, COPPER AND COPPER ALLOY Covered Arc Welding Electrodes
ECuNi (Alloy 187) is a copper-nickel, all-position, electrode of SMAW of wrought or cast alloys of similar composition as well as 80 Cu+20 Ni and 90 Cu+10 Ni alloys. It is also used for the clad sides of copper-nickel clad steels.
Typical Applications: marine applications due to its good resistance to the corrosive effects of sea water
| AWS Class: ECuNi | Certification: AWS A5.6/A5.6M:2008 |
| Alloy: ECuNi | ASME SFA A5.6 |
| Welding Position: F, V, OH, H | Current:
DCEP |
| Tensile Strength, kpsi: | 50 |
| Yield Strength, kpsi: | *NS |
| Elongation %: | 20 min |
*Not Specified
Typical Wire Chemistry as per AWS A5.6 (single values are maximum)
| Mn | Fe | Si | Cu including Ag | Ni including Cobalt | P | Pb | Ti | Other |
| 1.00-2.50 | 0.40-0.75 | 0.50 | Remainder | 29.0-33.0 | 0.020 | 0.02 | 0.50 | 0.50 |
| Typical Welding Parameters | |||||
| Diameter | Process | Volt | Amps (flat) | Amps (V/OH) | |
| in | (mm) | ||||
| 3/32 | (2.4) | SMAW | 24-28 | 70-85 | 65-75 |
| 1/8 | (3.2) | SMAW | 26-30 | 85-110 | 80-90 |
| 5/32 | (4.0) | SMAW | 28-32 | 110-140 | 100-120 |
| 3/16 | (4.8) | SMAW | 28-32 | 120-160 | 110-130 |