UTP A 3545 Nb is a solid wire in a special NiCr alloy, of the NiCr36Fe15Nb0.8 type, for high heat resistant cast alloys. It is used on chemical process equipment, high temperature installations and mixed joints between nickel alloys and steels.
The wire runs under shielding gas, fed continuously from the torch of a semi-automatic set or from a feeder. It handles manual work and mechanised stations alike.
- Classification EN ISO: 18274 S Ni Z (NiCr36Fe15Nb0.8)
- Diameters: 1.2 mm
Keep the interpass temperature low and limit weaving, nickel is prone to hot cracking. Set the gas flow so the pool stays covered along the whole bead, and screen the workstation when you weld outdoors. Check the contact tip, a worn bore upsets wire feeding and leads to burnback. Plan the number of layers and the bead sequence before you start, on heavier joints this keeps distortion down. Set current and voltage to the thickness and position, and try them on a test piece before production.
