Nickel Alloy ENi-1-AW (As-welded deposit)
Heat-treated state · default condition
UNS W82141 · also Ni-Rod 55/99
Use as the standard as-welded deposit to AWS A5.11 for joining commercially pure nickel, dissimilar steel-to-nickel joints and cold repair welding of cast iron.
Values for the AW condition
Other ENi-1 tempers and conditions
ENi-1 is listed in 2 conditions; see the grade overview at ENi-1.
- SR
- AW
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress relieved | Choose a 540-620 °C post-weld stress relief when repaired cast iron or heavy-wall steel needs lower residual stress and stable machining dimensions; strength falls slightly as ductility rises. | 220 | 420 | 34 | 90 HB | 9 % IACS |
AWDefaultThis page As-welded deposit | Use as the standard as-welded deposit to AWS A5.11 for joining commercially pure nickel, dissimilar steel-to-nickel joints and cold repair welding of cast iron. | 250 | 440 | 30 | 100 HB | 8.5 % IACS |
What is ENi-1-AW?
ENi-1-AW is ENi-1 heat treated to AW — use as the standard as-welded deposit to AWS A5.11 for joining commercially pure nickel, dissimilar steel-to-nickel joints and cold repair welding of cast iron. ENi-1-AW has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 440 MPa (63.8 ksi) — weaker than 87% of nickel alloy grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi). ENi-1-AW has a density of 8.9 g/cm³ (0.322 lb/in³), heavier than 91% of nickel alloy grades. It melts at 1,435°C (2,615 °F).
Advantages
- Easy to machine — 42/100, better than 99% of nickel alloy grades
- Conducts heat well — 42 W/m·K (24.3 BTU/hr·ft·°F), better than 95% of nickel alloy grades
- High electrical conductivity — 8.5 % IACS, better than 95% of nickel alloy grades
- Readily welded — 85/100, better than 83% of nickel alloy grades
Limitations
- Limited service temperature — 400°C (752 °F), worse than 94% of nickel alloy grades
- Low strength — 250 MPa (36.3 ksi), worse than 87% of nickel alloy grades
- Hard to polish — 60/100, worse than 84% of nickel alloy grades
ENi-1-AW properties
Typical room-temperature values for ENi-1-AW; 22 are specific to this condition. Other listed values are ENi-1 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
ENi-1-AW has a density of 8.9 g/cm³ (0.322 lb/in³), heavier than 91% of nickel alloy grades. It melts at 1,435°C (2,615 °F).
Mechanical16
ENi-1-AW has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 440 MPa (63.8 ksi) — weaker than 87% of nickel alloy grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
ENi-1-AW is rated for continuous service to 400°C (752 °F). It conducts heat at 42 W/m·K (24.3 BTU/hr·ft·°F), better than 95% of nickel alloy grades. Thermal expansion is 13.3 µm/m·K (7.39 µin/in·°F).
Electrical3
ENi-1-AW conducts electricity at 8.5 % IACS, better than 95% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), worse than 71% of nickel alloy grades.
Sustainability3
Producing a kilogram of ENi-1-AW takes about 130 MJ of energy and emits 13 kg of CO₂ — less than 87% of nickel alloy grades. Typical recycled content is 25%.
Manufacturability7
ENi-1-AW's machinability is fair (42/100, better than 99% of nickel alloy grades); weldability excellent (85/100); 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 ENi-1-AW
Is ENi-1 easy to machine?
The deposit is soft and gummy; use sharp positive-rake carbide tooling with low speed, heavy feed and generous coolant to avoid friction hardening and built-up edge.
Can ENi-1 be welded?
Run DCEP (some brands are AC-capable) with a short arc, short beads, low interpass temperature (below 100 °C on cast iron) and immediate peening to relieve stress. Remove all grease, moulding sand residue and sulphur/phosphorus contamination first, and bake electrodes at 120–200 °C to prevent hydrogen porosity.
Can ENi-1 be formed, bent or molded?
Not applicable — this grade is a covered-electrode consumable. The deposit is ductile enough to be peened or planished for stress relief.
What surface finishes work on ENi-1?
The weld can be ground and polished. It cannot be anodized, but nickel or chrome plating and painting are possible; the nickel surface is naturally corrosion resistant in alkaline media and needs no extra passivation.
ENi-1 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 |
|---|---|---|
| Tideoxidizer / nitrogen fixer | 1 – 4 | 2.5 |
| Si | ≤ 1.25 | 0.6 |
| Mn | ≤ 0.75 | 0.4 |
| Fe | ≤ 0.75 | 0.4 |
| Al | ≤ 1 | 0.3 |
| Cu | ≤ 0.25 | 0.1 |
| C | ≤ 0.1 | 0.05 |
| S | ≤ 0.02 | 0.01 |
| Other, eachtotal of other elements | ≤ 0.5 | — |
| NiNi + Co, balance | ≥ 92 (balance) | — |
ENi-1-AW — frequently asked
What is ENi-1-AW used for?
ENi-1-AW is typically used for cast iron repair welding, dissimilar metal buffer layers and cladding on steel. In short: machinable cast-iron repair deposit; pure nickel covered electrode; low dilution buffer layers.
What is the yield strength of ENi-1-AW?
ENi-1-AW has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 440 MPa (63.8 ksi) — weaker than 87% of nickel alloy grades. Strength varies by condition: see the 2 listed tempers.
Is ENi-1-AW easy to machine?
Not especially — machinability is rated fair (42/100, better than 99% of nickel alloy grades). The deposit is soft and gummy; use sharp positive-rake carbide tooling with low speed, heavy feed and generous coolant to avoid friction hardening and built-up edge.
Can ENi-1-AW be welded?
Yes — weldability is rated excellent (85/100). Run DCEP (some brands are AC-capable) with a short arc, short beads, low interpass temperature (below 100 °C on cast iron) and immediate peening to relieve stress. Remove all grease, moulding sand residue and sulphur/phosphorus contamination first, and bake electrodes at 120–200 °C to prevent hydrogen porosity.
What surface finishes work on ENi-1-AW?
The weld can be ground and polished. It cannot be anodized, but nickel or chrome plating and painting are possible; the nickel surface is naturally corrosion resistant in alkaline media and needs no extra passivation.
Can ENi-1-AW be formed, bent or molded?
Not applicable — this grade is a covered-electrode consumable. The deposit is ductile enough to be peened or planished for stress relief.
What is the maximum service temperature of ENi-1-AW?
ENi-1-AW is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ENi-1-AW and ENi-1-SR?
AW is the default condition — use as the standard as-welded deposit to AWS A5.11 for joining commercially pure nickel, dissimilar steel-to-nickel joints and cold repair welding of cast iron. SR: choose a 540-620 °C post-weld stress relief when repaired cast iron or heavy-wall steel needs lower residual stress and stable machining dimensions; strength falls slightly as ductility rises. Yield strength is 250 MPa in AW versus 220 MPa in SR.
Sources
- AWS A5.11/A5.11M — Nickel and Nickel-Alloy Welding Electrodes for Shielded Metal Arc Welding — AWS (2018)
- AWS A5.15 — Welding Electrodes and Rods for Cast Iron — AWS (2020)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys (Nickel and Nickel Alloys) — ASM International (1990)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering (Welding of Cast Irons / Nickel Alloys) — ASM International (1993)
- Nickel-base SMAW electrode data (Ni-Rod / Nickel 99 type covered electrodes) — Special Metals Welding Products / ESAB (2022)
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.