Thermanit 690 is a solid wire in a nickel chromium alloy for corrosion resistant NiCr alloys of the 690 type. It works on boiler components, furnace parts, chemical installations and heat exchangers exposed to aggressive media.
The wire runs under shielding gas, fed continuously from the torch of a semi-automatic set. It also serves for cladding carbon steel surfaces, and it covers tanks and pipework made of nickel alloys.
- Classification EN ISO: 18274 S Ni 6052 (NiCr30Fe9)
- AWS classification: A5.14 ERNiCrFe-7
- Shielding gas: I1, Z-ArHeHC-30/2/0.05
- Diameters: 0.5 / 0.9 / 1.0 / 1.2 mm
Move the pool more slowly than on steel, nickel alloys are sluggish and will not flow to the groove edges on their own. Match the feed rolls to the wire diameter and inspect the liner, wire slip shows up at once as an unstable arc. Watch the wire stick-out from the contact tip, too long a stick-out drops the arc voltage and worsens penetration. Thinner diameters suit root runs and thin sheet, thicker ones suit filling.
