Nickel Alloy ERNiCrMo-1-AW (As-welded deposit)
Heat-treated state · default condition
UNS N10004 · ISO S Ni 1004
Standard condition for pressure-vessel and piping joints in mixed acid service; Nb stabilization means no PWHT is required.
Values for the AW condition
Other ERNiCrMo-1 tempers and conditions
ERNiCrMo-1 is listed in 2 conditions; see the grade overview at ERNiCrMo-1.
- SA
- AW
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Weld deposit solution annealed ~1150 °C, water quenched | Choose when overlay or fabrication is given a full solution anneal to dissolve interdendritic Nb/Mo phases and maximize corrosion uniformity. | 300 | 620 | 50 | 165 HB | 1.4 % IACS |
AWDefaultThis page As-welded deposit | Standard condition for pressure-vessel and piping joints in mixed acid service; Nb stabilization means no PWHT is required. | 400 | 655 | 40 | 195 HB | 1.4 % IACS |
What is ERNiCrMo-1-AW?
ERNiCrMo-1-AW is ERNiCrMo-1 heat treated to AW — standard condition for pressure-vessel and piping joints in mixed acid service; Nb stabilization means no PWHT is required. ERNiCrMo-1-AW has a yield strength of 400 MPa (58 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 56% of nickel alloy grades. Elongation at break is 40% and the elastic modulus is 196 GPa (28.4 Msi). ERNiCrMo-1-AW has a density of 8.31 g/cm³ (0.3 lb/in³), heavier than 51% of nickel alloy grades. It melts at 1,260°C (2,300 °F).
Advantages
- Readily welded — 90/100, better than 96% of nickel alloy grades
ERNiCrMo-1-AW properties
Typical room-temperature values for ERNiCrMo-1-AW; 22 are specific to this condition. Other listed values are ERNiCrMo-1 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
ERNiCrMo-1-AW has a density of 8.31 g/cm³ (0.3 lb/in³), heavier than 51% of nickel alloy grades. It melts at 1,260°C (2,300 °F).
Mechanical16
ERNiCrMo-1-AW has a yield strength of 400 MPa (58 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 56% of nickel alloy grades. Elongation at break is 40% and the elastic modulus is 196 GPa (28.4 Msi).
Thermal6
ERNiCrMo-1-AW is rated for continuous service to 550°C (1,022 °F). It conducts heat at 10.1 W/m·K (5.84 BTU/hr·ft·°F), worse than 84% of nickel alloy grades. Thermal expansion is 14 µm/m·K (7.78 µin/in·°F).
Electrical3
ERNiCrMo-1-AW conducts electricity at 1.4 % IACS, worse than 65% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (80/100), better than 61% of nickel alloy grades.
Sustainability4
Producing a kilogram of ERNiCrMo-1-AW takes about 150 MJ of energy and emits 13 kg of CO₂ — less than 68% of nickel alloy grades. Typical recycled content is 30%.
Manufacturability7
ERNiCrMo-1-AW's machinability is poor (22/100, better than 64% of nickel alloy grades); weldability excellent (90/100); 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 ERNiCrMo-1-AW
Is ERNiCrMo-1 easy to machine?
Weld deposits machine like a solution-annealed Ni-Cr-Mo alloy: low speed, heavy positive-rake carbide, rigid setup and flood coolant to avoid work hardening and built-up edge.
Can ERNiCrMo-1 be welded?
Use GTAW/GMAW with 100 % Ar (or Ar-He) shielding, low heat input, stringer beads and interpass below ~120 °C; keep the deposit free of sulfur/lead contamination to avoid hot cracking.
Can ERNiCrMo-1 be formed, bent or molded?
Supplied as drawn wire or cut rod; deposits are ductile enough for cold straightening but heavy cold work on overlays should be followed by solution anneal.
What surface finishes work on ERNiCrMo-1?
Pickle or mechanically remove weld heat tint and Cr-rich oxide before service; passivation or electropolish restores the full corrosion performance of the deposit.
ERNiCrMo-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 |
|---|---|---|
| CAWS A5.14 max | ≤ 0.05 | 0.02 |
| Mn | 1 – 2 | 1.5 |
| Si | ≤ 1 | 0.4 |
| P | ≤ 0.04 | — |
| S | ≤ 0.03 | — |
| Cr | 21 – 23.5 | 22 |
| Mo | 5.5 – 7.5 | 6.5 |
| Fe | 18 – 21 | 19.5 |
| Cuimproves resistance in reducing acids | 1.5 – 2.5 | 2 |
| Nb+Tastabilizer against intergranular attack | 1.75 – 2.5 | 2.1 |
| W | ≤ 1 | 0.4 |
| Co | ≤ 2.5 | — |
| Ti | ≤ 0.05 | — |
| Nibalance, approx. 44–46 % | balance | — |
ERNiCrMo-1-AW — frequently asked
What is ERNiCrMo-1-AW used for?
ERNiCrMo-1-AW is typically used for chemical process equipment, reducing acid environments and hastelloy W piping repair. In short: legacy Hastelloy W filler; ductile as-welded deposit; reducing-acid service.
What is the yield strength of ERNiCrMo-1-AW?
ERNiCrMo-1-AW has a typical yield strength of 400 MPa (58 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 56% of nickel alloy grades. Strength varies by condition: see the 2 listed tempers.
Is ERNiCrMo-1-AW easy to machine?
Not especially — machinability is rated poor (22/100, better than 64% of nickel alloy grades). Weld deposits machine like a solution-annealed Ni-Cr-Mo alloy: low speed, heavy positive-rake carbide, rigid setup and flood coolant to avoid work hardening and built-up edge.
Can ERNiCrMo-1-AW be welded?
Yes — weldability is rated excellent (90/100). Use GTAW/GMAW with 100 % Ar (or Ar-He) shielding, low heat input, stringer beads and interpass below ~120 °C; keep the deposit free of sulfur/lead contamination to avoid hot cracking.
What surface finishes work on ERNiCrMo-1-AW?
Pickle or mechanically remove weld heat tint and Cr-rich oxide before service; passivation or electropolish restores the full corrosion performance of the deposit.
Can ERNiCrMo-1-AW be formed, bent or molded?
Supplied as drawn wire or cut rod; deposits are ductile enough for cold straightening but heavy cold work on overlays should be followed by solution anneal.
What is the maximum service temperature of ERNiCrMo-1-AW?
ERNiCrMo-1-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.
What is the difference between ERNiCrMo-1-AW and ERNiCrMo-1-SA?
AW is the default condition — standard condition for pressure-vessel and piping joints in mixed acid service; Nb stabilization means no PWHT is required. SA: choose when overlay or fabrication is given a full solution anneal to dissolve interdendritic Nb/Mo phases and maximize corrosion uniformity. Yield strength is 400 MPa in AW versus 300 MPa in SA.
Sources
- AWS A5.14/A5.14M — Nickel and Nickel-Alloy Bare Welding Electrodes and Rods — AWS (2018)
- ASME BPVC Section II Part C — SFA-5.14 — ASME (2023)
- ISO 18274 — Welding consumables, wire and strip electrodes for nickel and nickel alloys (S Ni 6007) — ISO (2010)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- Nickel alloy G / G-3 filler metal technical data — Haynes International / Special Metals (2020)
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.