BÖHLER Ni 2-UP is a submerged arc (SAW) wire for mild and low-alloy steels, including fine grained grades. It is used on steel structures, tanks, machine frames and workshop work on plain carbon steel.
The wire suits grades such as ASTM A 514. The low hydrogen level in the deposit reduces the risk of cold cracking.
- Classification EN ISO: S 46 6 FB S2Ni2
- AWS classification: F8A8-ENi2-Ni2
- Shielding: flux matched to the wire, no shielding gas
- Diameters: 2.5 / 3.0 / 4.0 mm
On heavier sections and in a cold workshop plan the preheating, so that the risk of cold cracking stays down. 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. Thinner diameters suit root runs and thin sheet, thicker ones suit filling.
