Union I 1,2 Ni is a TIG rod for welding low-temperature nickel steels. It works on LNG tanks, cryogenic installations and pipework operating below zero.
The rod suits root runs, thin walls and welds that need a smooth face. You feed the filler into the pool by hand while the arc burns between the tungsten electrode and the weld.
- Classification EN ISO: 636-A W 46 6 3Ni1
- AWS classification: A5.28 / SFA-5.28 ER80S-G
- Shielding gas: I1
- Diameters: 2.0 / 2.4 / 2.5 / 3.0 / 3.2 mm
- Approvals: TÜV (00513), DB (42.132.49), DNV, KTA 1408.1; (08012), CE
Keep the heat input and the interpass temperature down, low temperature toughness drops as soon as the joint overheats. Grind the tungsten tip along its axis and hold a short arc, otherwise the pool spreads. Protect the root when you weld from one side, an oxidised underside spoils the corrosion resistance.
