Hangbo Alloy Group
Shanghai · Est. 2012
AWS ERNiMo-7 / UNS N10665 — Welding wire specifications, parameters, and applications for nickel alloy fabrication.
Hastelloy B-2 (AWS ERNiMo-7) is a nickel-molybdenum welding wire for welding Hastelloy B-2 and B-3 alloys. Provides excellent resistance to hydrochloric acid at all concentrations and temperatures. Low carbon and iron content minimizes carbide precipitation.
| Parameter | GTAW | GMAW |
|---|---|---|
| Shielding Gas | Argon (99.995%) | Ar + 2% He or Ar + 2% CO2 |
| Gas Flow Rate | 8-15 L/min | 15-25 L/min |
| Wire Diameter | 1.6-3.2 mm | 0.8-1.6 mm |
| Current Type | DCEN | DCEP |
| Welding Position | All positions | Flat / Horizontal |
Hastelloy B-2 welding wire is used in a wide range of demanding applications:
Hangbo Alloy Group supplies Hastelloy B-2 welding wire in the following forms:
| Standard | Description |
|---|---|
| AWS A5.14 | ERNiMo-7 |
| ISO 18274 | S Ni 1066 |
| EN ISO 18274 | S Ni 1066 |
| DIN 1736 | SG-NiMo28 |
| Element | Content (%) |
|---|---|
| Nickel (Ni) | Balance |
| Molybdenum (Mo) | 26.0 – 30.0 |
| Iron (Fe) | 2.0 max |
| Chromium (Cr) | 1.0 max |
| Manganese (Mn) | 1.0 max |
| Carbon (C) | 0.02 max |
| Property | Typical Value |
|---|---|
| Tensile Strength | 760 MPa (110 ksi) min |
| Yield Strength (0.2%) | 400 MPa (58 ksi) min |
| Elongation | 30% min |
| Service Temperature | up to 1040°C (1900°F) |
Values above are typical for as-welded Hastelloy B-2 (ERNiMo-7) deposited metal under AWS A5.14 classification requirements. Actual results vary with welding process, heat input and shielding gas.
Follow these practical guidelines to obtain sound, corrosion-resistant welds with this filler metal:
No. B-2 has almost no chromium, so it performs poorly in oxidising acids. For nitric acid service see our nitric acid alloy selection guide.
Extended time between roughly 550°C and 850°C precipitates intermetallic phases that sharply reduce ductility and corrosion resistance, so low interpass temperatures are essential.
Yes. For concentrated hydrochloric acid and certain catalyst systems it remains the most cost-effective choice. See Hastelloy B-2 acid resistance.
AWS ERNiMo-7 / UNS N10665: nickel balance with about 26-30% molybdenum and very low carbon, iron and chromium.
AWS A5.14 (ERNiMo-7), ISO/EN 18274 (S Ni 1066) and DIN 1736 (SG-NiMo28).
TIG wire 1.6-3.2 mm, MIG spools 0.8-1.6 mm and SAW coils 2.4-4.0 mm.
Pure argon for GTAW; argon with helium or CO2 additions for GMAW.
Hydrochloric acid equipment, vacuum furnace components and high-purity pharmaceutical systems.
Limiting iron and carbon minimizes carbide and intermetallic precipitation, preserving corrosion resistance in the heat-affected zone.
Hangbo Alloy Group supplies Hastelloy B-2 (ERNiMo-7) welding wire with full material certifications. We ensure consistent wire quality with precise diameter control, clean surface finish, and uniform feeding performance.
For quotations, material certifications, or technical consultation, contact our sales team or call +86 166 2109 2936.
Request a quotation for Hastelloy B-2 round bars, tubes, plates, or custom products. We stock standard sizes and accept custom orders.