ERNiCrMo-4 – wire and rod for Hastelloy C-276
Ni-16Cr-16Mo-4W filler metal for alloy C-276, with high resistance to reducing and oxidizing acids, chlorides and mixed media in chemical and pollution control plants.
Product forms and equivalents
| Process | Classification |
|---|---|
| TIG rod (GTAW) | ERNiCrMo-4 |
| Solid MIG/MAG wire (GMAW) | ERNiCrMo-4 |
| Covered electrode (SMAW) | ENiCrMo-4 – AWS A5.11 |
| Submerged arc wire (SAW) | ERNiCrMo-4 + flux |
| Designation | Value |
|---|---|
| AWS | ERNiCrMo-4 |
| Specification | AWS A5.14/A5.14M / ASME SFA-5.14 |
| UNS | N10276 |
| Others | EN ISO 18274: S Ni 6276 (NiCr15Mo16Fe6W4); W.Nr. 2.4886 |
| Trade designation | Liga C-276 / Hastelloy C-276 (designação de material) |
Chemical composition (%)
| Element | wt. % |
|---|---|
| C | ≤ 0.02 |
| Cr | 14.5 – 16.5 |
| Mo | 15.0 – 17.0 |
| W | 3.0 – 4.5 |
| Fe | 4.0 – 7.0 |
| Co | ≤ 2.5 |
| V | ≤ 0.35 |
| Ni | Balance |
| Mn | ≤ 1.0 |
| Si | ≤ 0.08 |
| Cu | ≤ 0.50 |
| P | ≤ 0.04 |
| S | ≤ 0.03 |
Properties of the deposited metal
| Property | Value |
|---|---|
| Tensile strength of deposited metal | ≥ 690 MPa (AWS A5.11 minimum for ENiCrMo-4, reference) |
| Elongation | ≥ 25 % (AWS A5.11 minimum for ENiCrMo-4, reference) |
Materials welded with ERNiCrMo-4
Dissimilar joints: Also employed to join C-276 to stainless and to carbon steel, and in overlays on carbon steel exposed to aggressive media.
Why the composition differs from the base metal
Here the composition is practically that of the base metal, with very low carbon and silicon. Those limits are the key point: they reduce the precipitation of carbides and intermetallic phases in the fusion zone, which would strip the bead of its corrosion resistance.
Welding precautions
- No preheating; interpass below 100–150 °C.
- Low heat input and stringer beads, without wide weaving.
- 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 ERNiCrMo-4 used for?
Ni-16Cr-16Mo-4W filler metal for alloy C-276, with high resistance to reducing and oxidizing acids, chlorides and mixed media in chemical and pollution control plants.
Why is the composition of ERNiCrMo-4 different from the material it welds?
Here the composition is practically that of the base metal, with very low carbon and silicon. Those limits are the key point: they reduce the precipitation of carbides and intermetallic phases in the fusion zone, which would strip the bead of its corrosion resistance.
Which covered electrode corresponds to ERNiCrMo-4?
ENiCrMo-4 – AWS A5.11.
What precautions apply when welding with ERNiCrMo-4?
No preheating; interpass below 100–150 °C. Low heat input and stringer beads, without wide weaving. TIG with pure argon or argon-helium; argon root purge. Rigorous cleaning: oil, paint and markers contaminate the nickel alloy with sulfur and lead.
