ERNiCrMo-10 – wire and rod for Hastelloy C-22
Ni-21Cr-13Mo-3W filler metal for alloy C-22, also used as an over-alloyed option for welding C-276, alloy 625 and super-austenitics.
Product forms and equivalents
| Process | Classification |
|---|---|
| TIG rod (GTAW) | ERNiCrMo-10 |
| Solid MIG/MAG wire (GMAW) | ERNiCrMo-10 |
| Covered electrode (SMAW) | ENiCrMo-10 – AWS A5.11 |
| Submerged arc wire (SAW) | ERNiCrMo-10 + flux |
| Designation | Value |
|---|---|
| AWS | ERNiCrMo-10 |
| Specification | AWS A5.14/A5.14M / ASME SFA-5.14 |
| UNS | N06022 |
| Others | EN ISO 18274: S Ni 6022 (NiCr21Mo13Fe4W3); W.Nr. 2.4635 |
| Trade designation | Liga C-22 / Hastelloy C-22 (designação de material) |
Chemical composition (%)
| Element | wt. % |
|---|---|
| C | ≤ 0.015 |
| Cr | 20.0 – 22.5 |
| Mo | 12.5 – 14.5 |
| W | 2.5 – 3.5 |
| Fe | 2.0 – 6.0 |
| Co | ≤ 2.5 |
| V | ≤ 0.35 |
| Ni | Balance |
| Mn | ≤ 0.50 |
| Si | ≤ 0.08 |
| Cu | ≤ 0.50 |
| P | ≤ 0.02 |
| S | ≤ 0.010 |
Properties of the deposited metal
| Property | Value |
|---|---|
| Tensile strength of deposited metal | ≥ 690 MPa (AWS A5.11 minimum for ENiCrMo-10, reference) |
| Elongation | ≥ 25 % (AWS A5.11 minimum for ENiCrMo-10, reference) |
Materials welded with ERNiCrMo-10
- Hastelloy C-22
- Hastelloy C-276
- Inconel 625 / Alloy 625
- 254 SMO / F44
- Super duplex 2507 / F53 / S32750
- Super duplex Zeron 100 / F55 / S32760
Dissimilar joints: A good choice for joints between different Ni-Cr-Mo alloys and between those alloys and stainless, since the higher chromium tolerates dilution with iron well.
Why the composition differs from the base metal
For alloy C-22 itself the chemistry is practically identical, with very low carbon and silicon. On C-276 and super-austenitics it serves as over-alloyed metal: 21 % chromium and 13 % molybdenum give the bead corrosion resistance equal to or higher than the base metal even after segregation.
Welding precautions
- No preheating; interpass below 100–150 °C.
- Low heat input; avoid repeatedly reheating the same region.
- 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-10 used for?
Ni-21Cr-13Mo-3W filler metal for alloy C-22, also used as an over-alloyed option for welding C-276, alloy 625 and super-austenitics.
Why is the composition of ERNiCrMo-10 different from the material it welds?
For alloy C-22 itself the chemistry is practically identical, with very low carbon and silicon. On C-276 and super-austenitics it serves as over-alloyed metal: 21 % chromium and 13 % molybdenum give the bead corrosion resistance equal to or higher than the base metal even after segregation.
Which covered electrode corresponds to ERNiCrMo-10?
ENiCrMo-10 – AWS A5.11.
What precautions apply when welding with ERNiCrMo-10?
No preheating; interpass below 100–150 °C. Low heat input; avoid repeatedly reheating the same region. TIG with pure argon or argon-helium; argon root purge. Rigorous cleaning: oil, paint and markers contaminate the nickel alloy with sulfur and lead.
