Nickel Alloy ERNiCrFe-7
UNS N06052 · ISO S Ni 6052 · also Filler Metal 52
ERNiCrFe-7 is a high-chromium nickel-chromium-iron filler wire (UNS N06052, Filler Metal 52) used for welding Alloy 690 and for dissimilar-metal joints in nuclear steam generator and reactor vessel work, where improved stress-corrosion-cracking resistance is required.
Reference datasheet — ERNiCrFe-7 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the AW condition
ERNiCrFe-7 tempers and conditions
ERNiCrFe-7 is supplied in 3 conditions, soft to hard. AW is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Post-weld heat treated | Use when the joint contains low-alloy ferritic steel requiring code-mandated stress relief; slight strength drop, toughness retained. | 390 | 630 | 42 | 175 HB | 1.5 % IACS |
As-welded deposit made by GMAW/pulsed MIG or hot-wire GTAW cladding | Pick for high-deposition cladding and buttering layers; slightly higher dilution and lower toughness than manual GTAW. | 405 | 640 | 36 | 190 HB | 1.5 % IACS |
AWDefault As-welded deposit | Default condition: GTAW deposit used as-welded for Alloy 690 and dissimilar-metal nuclear joints. | 415 | 655 | 40 | 185 HB | 1.5 % IACS |
Supply forms, finishes and certifications
Ways ERNiCrFe-7 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
SA-WIRE | Bare solid filler wire/rod as supplied | Supply form |
What is ERNiCrFe-7?
ERNiCrFe-7 is a high-chromium nickel-chromium-iron filler wire (UNS N06052, Filler Metal 52) used for welding Alloy 690 and for dissimilar-metal joints in nuclear steam generator and reactor vessel work, where improved stress-corrosion-cracking resistance is required. It is supplied as solution-annealed cold-drawn wire for GTAW, hot-wire GTAW and GMAW; as-welded deposits give about 415 MPa yield, 655 MPa tensile, 40% elongation, 185 HB and service to 950 °C, the highest in this filler family. The deposit is sluggish and prone to lack of fusion and ductility-dip cracking, and machining is difficult. ERNiCrFe-7A is the modified grade used where hot-crack resistance is critical. ERNiCrFe-7 has a density of 8.3 g/cm³ (0.3 lb/in³), lighter than 52% of nickel alloy grades. It melts at 1,360°C (2,480 °F). ERNiCrFe-7 has a yield strength of 415 MPa (60.2 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 61% of nickel alloy grades. Elongation at break is 40% and the elastic modulus is 207 GPa (30 Msi).
What is ERNiCrFe-7 used for?
- nuclear reactor dissimilar metal welds
- Alloy 690 tube-to-tubesheet welding
- steam generator repairs
Advantages
- Tough — resists crack growth — 190 MPa·√m (172.9 ksi·√in), better than 96% of nickel alloy grades
- Good corrosion resistance — 88/100, better than 81% of nickel alloy grades
ERNiCrFe-7 properties
Typical room-temperature values for ERNiCrFe-7-AW; bars are the position among nickel alloy grades.
Physical3
ERNiCrFe-7 has a density of 8.3 g/cm³ (0.3 lb/in³), lighter than 52% of nickel alloy grades. It melts at 1,360°C (2,480 °F).
Mechanical16
ERNiCrFe-7 has a yield strength of 415 MPa (60.2 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 61% of nickel alloy grades. Elongation at break is 40% and the elastic modulus is 207 GPa (30 Msi).
Thermal6
ERNiCrFe-7 is rated for continuous service to 950°C (1,742 °F). It conducts heat at 12 W/m·K (6.93 BTU/hr·ft·°F), better than 65% of nickel alloy grades. Thermal expansion is 13.9 µm/m·K (7.72 µin/in·°F).
Electrical3
ERNiCrFe-7 conducts electricity at 1.5 % IACS, better than 59% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is excellent (88/100), better than 81% of nickel alloy grades.
Sustainability4
Producing a kilogram of ERNiCrFe-7 takes about 155 MJ of energy and emits 13 kg of CO₂ — less than 58% of nickel alloy grades. Typical recycled content is 25%.
Manufacturability7
ERNiCrFe-7's machinability is poor (22/100, better than 64% of nickel alloy grades); weldability very good (78/100); formability good (60/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the nickel alloy family
Yield strength against density for every nickel alloy grade FabDigit runs. ERNiCrFe-7 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ERNiCrFe-7
Is ERNiCrFe-7 easy to machine?
Deposits machine like Alloy 690 — low speed, heavy positive-rake carbide, rigid setup and flood coolant to fight work hardening.
Can ERNiCrFe-7 be welded?
GTAW/hot-wire GTAW preferred with low heat input, interpass ≤150 °C, stringer beads and clean interpass grinding to avoid lack of fusion and ductility-dip cracking.
Can ERNiCrFe-7 be formed, bent or molded?
Supplied as drawn wire; no user forming beyond straightening — keep wire clean and free of oil, moisture and copper contamination.
ERNiCrFe-7 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 |
|---|---|---|
| Cr | 28 – 31.5 | 29.5 |
| Fe | 7 – 11 | 9 |
| C | ≤ 0.04 | 0.03 |
| Mn | ≤ 1 | 0.25 |
| Si | ≤ 0.5 | 0.15 |
| Ti | ≤ 1 | 0.5 |
| Al | ≤ 1.1 | 0.7 |
| Nb+Ta | ≤ 0.1 | 0.02 |
| Mo | ≤ 0.5 | 0.05 |
| Cu | ≤ 0.3 | 0.02 |
| Colow-cobalt requirement for nuclear service | ≤ 0.1 | 0.02 |
| P | ≤ 0.02 | 0.01 |
| S | ≤ 0.02 | 0 |
| Other elements, total | ≤ 0.5 | |
| Niplus incidental Co, remainder | ≥ 54 (balance) |
What surface finishes work on ERNiCrFe-7?
Pickle or mechanically clean the Cr-rich oxide before subsequent passes; electropolish or passivate for nuclear surface-cleanliness requirements; not anodizable.
Surface treatments FabDigit runs on nickel alloy parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Plating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Nickel Alloy ERNiCrFe-7 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N06052
- ISO
- S Ni 6052
- Trade names
- Filler Metal 52
How much does ERNiCrFe-7 cost?
ERNiCrFe-7 is a high-cost nickel alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
ERNiCrFe-7 — frequently asked
What is ERNiCrFe-7 used for?
ERNiCrFe-7 is typically used for nuclear reactor dissimilar metal welds, alloy 690 tube-to-tubesheet welding and steam generator repairs. In short: nuclear dissimilar-metal standard; highest service temperature, 950 °C; high-Cr SCC resistance.
What is the yield strength of ERNiCrFe-7?
ERNiCrFe-7 has a typical yield strength of 415 MPa (60.2 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 61% of nickel alloy grades. Strength varies by condition: see the 3 listed tempers.
Is ERNiCrFe-7 easy to machine?
Not especially — machinability is rated poor (22/100, better than 64% of nickel alloy grades). Deposits machine like Alloy 690 — low speed, heavy positive-rake carbide, rigid setup and flood coolant to fight work hardening.
Can ERNiCrFe-7 be welded?
Yes — weldability is rated very good (78/100). GTAW/hot-wire GTAW preferred with low heat input, interpass ≤150 °C, stringer beads and clean interpass grinding to avoid lack of fusion and ductility-dip cracking.
What surface finishes work on ERNiCrFe-7?
Pickle or mechanically clean the Cr-rich oxide before subsequent passes; electropolish or passivate for nuclear surface-cleanliness requirements; not anodizable.
Can ERNiCrFe-7 be formed, bent or molded?
Supplied as drawn wire; no user forming beyond straightening — keep wire clean and free of oil, moisture and copper contamination.
What is the maximum service temperature of ERNiCrFe-7?
ERNiCrFe-7 is rated for continuous use to about 950°C (1,742 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ERNiCrFe-7-AW and ERNiCrFe-7 PWHT?
AW is the default condition — default condition: GTAW deposit used as-welded for Alloy 690 and dissimilar-metal nuclear joints. PWHT: use when the joint contains low-alloy ferritic steel requiring code-mandated stress relief; slight strength drop, toughness retained. Yield strength is 415 MPa in AW versus 390 MPa in PWHT.
How much does ERNiCrFe-7 cost?
ERNiCrFe-7 is a high-cost nickel alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- AWS A5.14/A5.14M — Nickel and Nickel-Alloy Bare Welding Electrodes and Rods — American Welding Society (2018)
- ASME SFA-5.14 (Section II Part C) — ASME (2023)
- INCONEL Filler Metal 52 / Alloy 690 product data — Special Metals Corporation (2020)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering (Ni-alloy weldability) — ASM International (1993)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.