ERNiCrCoMo-1 – wire and rod for Incoloy 800HT and Inconel 601 at high temperature
Ni-22Cr-12Co-9Mo-Al filler metal for service above about 760 °C, with high creep and oxidation resistance; indicated for 800HT, alloy 601 and joints between heat-resisting alloys.
Product forms and equivalents
| Process | Classification |
|---|---|
| TIG rod (GTAW) | ERNiCrCoMo-1 |
| Solid MIG/MAG wire (GMAW) | ERNiCrCoMo-1 |
| Covered electrode (SMAW) | ENiCrCoMo-1 – AWS A5.11 |
| Designation | Value |
|---|---|
| AWS | ERNiCrCoMo-1 |
| Specification | AWS A5.14/A5.14M / ASME SFA-5.14 |
| UNS | N06617 |
| Others | EN ISO 18274: S Ni 6617 (NiCr22Co12Mo9); W.Nr. 2.4627 |
| Trade designation | Liga 617 (designação genérica) |
Chemical composition (%)
| Element | wt. % |
|---|---|
| C | 0.05 – 0.15 |
| Cr | 20.0 – 24.0 |
| Co | 10.0 – 15.0 |
| Mo | 8.0 – 10.0 |
| Al | 0.8 – 1.5 |
| Fe | ≤ 3.0 |
| Ti | ≤ 0.60 |
| Ni | Balance |
| Mn | ≤ 1.0 |
| Si | ≤ 1.0 |
| Cu | ≤ 0.50 |
| P | ≤ 0.03 |
| S | ≤ 0.015 |
Properties of the deposited metal
| Property | Value |
|---|---|
| Tensile strength of deposited metal | ≥ 620 MPa (AWS A5.11 minimum for ENiCrCoMo-1, reference) |
| Elongation | ≥ 25 % (AWS A5.11 minimum for ENiCrCoMo-1, reference) |
Materials welded with ERNiCrCoMo-1
Dissimilar joints: Used in joints between 800HT, alloy 601, 310 stainless and heat-resisting steels when the service temperature exceeds about 760 °C.
Why the composition differs from the base metal
The wire does not copy 800HT or alloy 601: it is much richer in nickel and carries cobalt and molybdenum. This gives the bead creep resistance equal to or higher than the base metal at high temperature, since an as-welded deposit of the same chemistry would lose strength and ductility in service.
Welding precautions
- No preheating; interpass below 150 °C.
- Moderate heat input; the deposit is sensitive to hot cracking if contaminated.
- 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 ERNiCrCoMo-1 used for?
Ni-22Cr-12Co-9Mo-Al filler metal for service above about 760 °C, with high creep and oxidation resistance; indicated for 800HT, alloy 601 and joints between heat-resisting alloys.
Why is the composition of ERNiCrCoMo-1 different from the material it welds?
The wire does not copy 800HT or alloy 601: it is much richer in nickel and carries cobalt and molybdenum. This gives the bead creep resistance equal to or higher than the base metal at high temperature, since an as-welded deposit of the same chemistry would lose strength and ductility in service.
Which covered electrode corresponds to ERNiCrCoMo-1?
ENiCrCoMo-1 – AWS A5.11.
What precautions apply when welding with ERNiCrCoMo-1?
No preheating; interpass below 150 °C. Moderate heat input; the deposit is sensitive to hot cracking if contaminated. TIG with pure argon or argon-helium; argon root purge. Rigorous cleaning: oil, paint and markers contaminate the nickel alloy with sulfur and lead.
