Nickel Alloy ERNiMo-3-AW (As-welded deposit)
Heat-treated state · default condition
UNS N10675 · also Hastelloy B-3 Filler Wire
Default condition for design of GTAW/GMAW joints and weld overlays made with this wire, no post-weld heat treatment.
Values for the AW condition
Other ERNiMo-3 tempers and conditions
ERNiMo-3 is listed in 3 conditions; see the grade overview at ERNiMo-3.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Weld deposit solution annealed after welding | Choose when the fabrication is fully solution annealed after welding to homogenise the deposit and maximise ductility and intergranular corrosion resistance. | 395 | 780 | 52 | 195 HB | 1.3 % IACS |
AWDefaultThis page As-welded deposit | Default condition for design of GTAW/GMAW joints and weld overlays made with this wire, no post-weld heat treatment. | 440 | 760 | 40 | 210 HB | — |
spooled GMAW/SAW wire, as-drawn temper | Pick for spool-fed GMAW, plasma or laser hot-wire feeding, where the stiffer cold-drawn wire feeds better; wire strength is irrelevant to joint properties. | 800 | 1,000 | 15 | 25 HRC | 1.3 % IACS |
What is ERNiMo-3-AW?
ERNiMo-3-AW is ERNiMo-3 heat treated to AW — default condition for design of GTAW/GMAW joints and weld overlays made with this wire, no post-weld heat treatment. ERNiMo-3-AW has a yield strength of 440 MPa (63.8 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 65% of nickel alloy grades. Elongation at break is 40% and the elastic modulus is 217 GPa (31.5 Msi). ERNiMo-3-AW has a density of 9.22 g/cm³ (0.333 lb/in³), heavier than 97% of nickel alloy grades. It melts at 1,370°C (2,498 °F).
Limitations
- Low electrical conductivity — 1.3 % IACS, worse than 97% of nickel alloy grades
- Hard to polish — 60/100, worse than 84% of nickel alloy grades
ERNiMo-3-AW properties
Typical room-temperature values for ERNiMo-3-AW; 10 are specific to this condition. Other listed values are ERNiMo-3 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
ERNiMo-3-AW has a density of 9.22 g/cm³ (0.333 lb/in³), heavier than 97% of nickel alloy grades. It melts at 1,370°C (2,498 °F).
Mechanical14
ERNiMo-3-AW has a yield strength of 440 MPa (63.8 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 65% of nickel alloy grades. Elongation at break is 40% and the elastic modulus is 217 GPa (31.5 Msi).
Thermal6
ERNiMo-3-AW is rated for continuous service to 550°C (1,022 °F). It conducts heat at 10 W/m·K (5.78 BTU/hr·ft·°F), worse than 88% of nickel alloy grades. Thermal expansion is 10.7 µm/m·K (5.94 µin/in·°F).
Electrical3
ERNiMo-3-AW conducts electricity at 1.3 % IACS, worse than 97% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is excellent (85/100), better than 74% of nickel alloy grades.
Sustainability4
Producing a kilogram of ERNiMo-3-AW takes about 175 MJ of energy and emits 13 kg of CO₂ — more than 65% of nickel alloy grades. Typical recycled content is 30%.
Manufacturability7
ERNiMo-3-AW's machinability is poor (15/100, worse than 76% of nickel alloy grades); weldability very good (80/100); formability good (60/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ERNiMo-3-AW
Is ERNiMo-3 easy to machine?
Weld overlay machines like solution-annealed Ni-Mo: slow speeds, heavy positive-rake carbide, rigid setup and flood coolant; expect rapid work hardening and poor chip breaking.
Can ERNiMo-3 be welded?
GTAW/GMAW with 100 % Ar (or Ar-He), stringer beads, low heat input and interpass ≤95–150 °C; no preheat, no filler dilution with high-Cr/high-Fe metals, and avoid prolonged 650–900 °C exposure.
Can ERNiMo-3 be formed, bent or molded?
Supplied as drawn wire; joint design should allow low-restraint, multi-pass filling since the deposit is ductile but sensitive to high dilution from carbon steel.
What surface finishes work on ERNiMo-3?
Remove all weld heat tint and oxide by pickling, grinding or stainless brushing before service — residual scale sharply degrades HCl resistance; electropolishing gives the best surface, anodizing is not applicable.
ERNiMo-3 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Mo | 27 – 32 | 28.5 |
| Cr | 1 – 3 | 1.5 |
| Fe | 1 – 3 | 1.5 |
| Co | ≤ 3 | 0.5 |
| W | ≤ 3 | 0.5 |
| Mn | ≤ 3 | 0.25 |
| Aldeoxidiser | ≤ 0.5 | 0.3 |
| Ti | ≤ 0.2 | 0.1 |
| Sikept low to avoid β-phase / intermetallics | ≤ 0.1 | 0.03 |
| C | ≤ 0.01 | 0.01 |
| Cu | ≤ 0.2 | 0.05 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.01 | 0 |
| Nibalance, typically 64–66 % | balance | — |
ERNiMo-3-AW — frequently asked
What is ERNiMo-3-AW used for?
ERNiMo-3-AW is typically used for hydrochloric acid processing equipment, chemical reactor vessels and acetic acid production equipment. In short: matches Hastelloy B-3; best for hydrochloric acid; not for oxidizing media.
What is the yield strength of ERNiMo-3-AW?
ERNiMo-3-AW has a typical yield strength of 440 MPa (63.8 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 65% of nickel alloy grades. Strength varies by condition: see the 3 listed tempers.
Is ERNiMo-3-AW easy to machine?
Not especially — machinability is rated poor (15/100, worse than 76% of nickel alloy grades). Weld overlay machines like solution-annealed Ni-Mo: slow speeds, heavy positive-rake carbide, rigid setup and flood coolant; expect rapid work hardening and poor chip breaking.
Can ERNiMo-3-AW be welded?
Yes — weldability is rated very good (80/100). GTAW/GMAW with 100 % Ar (or Ar-He), stringer beads, low heat input and interpass ≤95–150 °C; no preheat, no filler dilution with high-Cr/high-Fe metals, and avoid prolonged 650–900 °C exposure.
What surface finishes work on ERNiMo-3-AW?
Remove all weld heat tint and oxide by pickling, grinding or stainless brushing before service — residual scale sharply degrades HCl resistance; electropolishing gives the best surface, anodizing is not applicable.
Can ERNiMo-3-AW be formed, bent or molded?
Supplied as drawn wire; joint design should allow low-restraint, multi-pass filling since the deposit is ductile but sensitive to high dilution from carbon steel.
What is the maximum service temperature of ERNiMo-3-AW?
ERNiMo-3-AW is rated for continuous use to about 550°C (1,022 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- AWS A5.14/A5.14M — Nickel and Nickel-Alloy Bare Welding Electrodes and Rods — American Welding Society (2018)
- HASTELLOY B-3 alloy (N10675) principal features and data — Haynes International (2020)
- ASTM B335 / B622 — Ni-Mo alloy rod and seamless pipe/tube (N10675) — ASTM International (2021)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering (nickel-alloy filler metals) — ASM International (1993)
- ASM Specialty Handbook: Nickel, Cobalt and Their Alloys — ASM International (2000)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.