ERNiCr-3 – wire and rod for Inconel 600 and dissimilar joints
Ni-20Cr-3Mn-2.5Nb filler metal for alloy 600, for the 800/800HT family and for dissimilar joints between carbon steel, stainless and nickel alloys, including cryogenic and high-temperature service.
Product forms and equivalents
| Process | Classification |
|---|---|
| TIG rod (GTAW) | ERNiCr-3 |
| Solid MIG/MAG wire (GMAW) | ERNiCr-3 |
| Covered electrode (SMAW) | ENiCrFe-3 – AWS A5.11 |
| Flux-cored wire (FCAW) | ENiCr3T0-4 – AWS A5.34* |
| Submerged arc wire (SAW) | ERNiCr-3 + flux |
| Designation | Value |
|---|---|
| AWS | ERNiCr-3 |
| Specification | AWS A5.14/A5.14M / ASME SFA-5.14 |
| UNS | N06082 |
| Others | EN ISO 18274: S Ni 6082 (NiCr20Mn3Nb); W.Nr. 2.4806 |
| Trade designation | Liga 82 (designação genérica) |
Chemical composition (%)
| Element | wt. % |
|---|---|
| C | ≤ 0.10 |
| Cr | 18.0 – 22.0 |
| Nb + Ta | 2.0 – 3.0 |
| Mn | 2.5 – 3.5 |
| Fe | ≤ 3.0 |
| Ni | ≥ 67.0 |
| Ti | ≤ 0.75 |
| Si | ≤ 0.50 |
| Cu | ≤ 0.50 |
| P | ≤ 0.03 |
| S | ≤ 0.015 |
Properties of the deposited metal
| Property | Value |
|---|---|
| Tensile strength of deposited metal | ≥ 550 MPa (AWS A5.11 minimum for ENiCrFe-3, reference) |
| Elongation | ≥ 30 % (AWS A5.11 minimum for ENiCrFe-3, reference) |
Materials welded with ERNiCr-3
Dissimilar joints: The classic joint between carbon or Cr-Mo steel and austenitic stainless at elevated temperature, where the intermediate expansion coefficient and low carbon diffusion outperform ER309L. Also used to join nickel 200, nickel alloys and stainless steels to each other, and on A-286 when strength equivalent to the aged base metal is not required.
Why the composition differs from the base metal
Compared with alloy 600, the wire carries about 3 % manganese and 2.5 % niobium. Manganese ties up sulfur, and niobium forms carbides and changes solidification, which makes the bead much less sensitive to hot cracking, especially when there is dilution with iron in dissimilar joints.
Welding precautions
- No preheating for nickel alloys; when joining to carbon or Cr-Mo steel, follow the preheat required by the steel.
- The nickel alloy pool is viscous and penetrates little: use a wider bevel, a smaller root face and place the wire at the edge of the pool.
- TIG with pure argon or argon-helium; argon root purge. Rigorous cleaning: oil, paint and markers contaminate the nickel alloy with sulfur and lead.
Frequently asked questions
What is ERNiCr-3 used for?
Ni-20Cr-3Mn-2.5Nb filler metal for alloy 600, for the 800/800HT family and for dissimilar joints between carbon steel, stainless and nickel alloys, including cryogenic and high-temperature service.
Why is the composition of ERNiCr-3 different from the material it welds?
Compared with alloy 600, the wire carries about 3 % manganese and 2.5 % niobium. Manganese ties up sulfur, and niobium forms carbides and changes solidification, which makes the bead much less sensitive to hot cracking, especially when there is dilution with iron in dissimilar joints.
Which covered electrode corresponds to ERNiCr-3?
ENiCrFe-3 – AWS A5.11.
What precautions apply when welding with ERNiCr-3?
No preheating for nickel alloys; when joining to carbon or Cr-Mo steel, follow the preheat required by the steel. The nickel alloy pool is viscous and penetrates little: use a wider bevel, a smaller root face and place the wire at the edge of the pool. TIG with pure argon or argon-helium; argon root purge. Rigorous cleaning: oil, paint and markers contaminate the nickel alloy with sulfur and lead.
