Union S 3 NiMo 1 is a low-alloy, high strength submerged arc (SAW) wire. It goes into mobile equipment, machine frames, cranes and weight saving components.
Submerged arc welding gives a very high deposition rate on long, repeatable welds. The copper coated surface improves current pick-up in the contact tip and smooth feeding.
- Classification EN ISO: 26304-A S3Ni1Mo
- AWS classification: A5.23 / SFA-5.23 EF3
- Shielding: flux matched to the wire, no shielding gas
- Diameters: 1.6 / 2.0 / 2.5 / 3.0 / 3.2 / 4.0 / 5.0 mm
Do not exceed the permitted interpass temperature, an overheated heat affected zone loses its toughness. Watch the wire stick-out and the position of the head against the weld centre line, under a flux you cannot see the pool and a mistake shows only after the slag is chipped off. Match the flux to this wire and check how dry it is, drying the flux decides the hydrogen level in the weld.
