Nickel Alloy ERNiCrMo-7
UNS N06455 · ISO S Ni 6455
ERNiCrMo-7 is a bare Ni-Cr-Mo filler wire (UNS N06455) matched to C-4 base metal; its stabilized low-carbon chemistry keeps corrosion resistance in the as-welded condition without post-weld solution annealing.
Reference datasheet — ERNiCrMo-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
ERNiCrMo-7 tempers and conditions
ERNiCrMo-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 |
|---|---|---|---|---|---|---|
Solution Annealed | Optional PWHT that homogenizes dendritic Mo segregation and maximizes corrosion resistance and ductility in critical vessels. | 400 | 690 | 50 | 175 HB | 1.4 % IACS |
As Welded | Higher-deposition spool-fed condition for thicker sections; slightly lower ductility and toughness than GTAW due to higher heat input and dilution. | 460 | 705 | 36 | 196 HB | 1.4 % IACS |
AWDefault As-welded deposit | Standard delivery condition of the joint: use when C-4 weldments must go into corrosive service without post-weld solution annealing. | 470 | 720 | 40 | 200 HB | — |
Supply forms, finishes and certifications
Ways ERNiCrMo-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 |
|---|---|---|
WIRE | Filler wire / rod as supplied | Supply form |
What is ERNiCrMo-7?
ERNiCrMo-7 is a bare Ni-Cr-Mo filler wire (UNS N06455) matched to C-4 base metal; its stabilized low-carbon chemistry keeps corrosion resistance in the as-welded condition without post-weld solution annealing. Supplied as spooled wire and cut lengths for GTAW, GMAW and PAW, it deposits about 470 MPa yield, 720 MPa tensile, 40 % elongation and 200 HB (92 HRB), with service to 650 °C. The deposit work-hardens and machines slowly (machinability 18), and filler cost is high; for the most aggressive mixed acids, ERNiCrMo-13 is the nearest step up. ERNiCrMo-7 has a density of 8.64 g/cm³ (0.312 lb/in³), heavier than 70% of nickel alloy grades. It melts at 1,338°C (2,440 °F). ERNiCrMo-7 has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 68% of nickel alloy grades. Elongation at break is 40% and the elastic modulus is 211 GPa (30.6 Msi).
What is ERNiCrMo-7 used for?
- chemical process piping
- as-welded corrosive service equipment
- flue gas desulfurization systems
Advantages
- Readily welded — 88/100, better than 92% of nickel alloy grades
- Good corrosion resistance — 92/100, better than 91% of nickel alloy grades
ERNiCrMo-7 properties
Typical room-temperature values for ERNiCrMo-7-AW; bars are the position among nickel alloy grades.
Physical3
ERNiCrMo-7 has a density of 8.64 g/cm³ (0.312 lb/in³), heavier than 70% of nickel alloy grades. It melts at 1,338°C (2,440 °F).
Mechanical14
ERNiCrMo-7 has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 68% of nickel alloy grades. Elongation at break is 40% and the elastic modulus is 211 GPa (30.6 Msi).
Thermal6
ERNiCrMo-7 is rated for continuous service to 650°C (1,202 °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 10.8 µm/m·K (6 µin/in·°F).
Electrical3
ERNiCrMo-7 conducts electricity at 1.4 % IACS, worse than 65% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is excellent (92/100), better than 91% of nickel alloy grades.
Sustainability4
Producing a kilogram of ERNiCrMo-7 takes about 165 MJ of energy and emits 14 kg of CO₂ — more than 54% of nickel alloy grades. Typical recycled content is 35%.
Manufacturability7
ERNiCrMo-7's machinability is poor (18/100, worse than 61% of nickel alloy grades); weldability excellent (88/100); 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. ERNiCrMo-7 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ERNiCrMo-7
Is ERNiCrMo-7 easy to machine?
Weld metal machines like alloy C-4: gummy and work-hardening — use rigid setups, positive-rake carbide, heavy constant feed, low SFM and flood coolant; avoid dwelling.
Can ERNiCrMo-7 be welded?
GTAW/GMAW/PAW with 100 % Ar (Ar+He for thick sections); keep heat input below ~1.5 kJ/mm, interpass ≤ 100 °C, no preheat, stringer beads and full back-purge; clean to bright metal to avoid porosity and hot cracking.
Can ERNiCrMo-7 be formed, bent or molded?
Supplied as drawn wire; deposits are ductile enough for hammer testing and cold straightening but work-harden rapidly, so cold forming of weldments needs intermediate anneals.
ERNiCrMo-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 | 14 – 18 | 16 |
| Mo | 14 – 17 | 15.5 |
| Fe | ≤ 3 | 1.5 |
| Tistabilizer against grain-boundary carbide precipitation | ≤ 0.7 | 0.3 |
| Co | ≤ 2 | 0.5 |
| Mn | ≤ 1 | 0.4 |
| Si | ≤ 0.08 | 0.04 |
| C | ≤ 0.02 | 0.01 |
| Cu | ≤ 0.5 | 0.05 |
| P | ≤ 0.04 | 0.01 |
| S | ≤ 0.03 | 0.01 |
| Other (each)total of unspecified elements per AWS A5.14 | ≤ 0.5 | |
| Nibalance, typically ~65 % | balance |
What surface finishes work on ERNiCrMo-7?
Pickle or bead-blast plus passivation to remove heat tint — chromium-depleted oxide is the weak point for pitting; electropolishing gives the best as-welded corrosion performance.
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 ERNiCrMo-7 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N06455
- ISO
- S Ni 6455
How much does ERNiCrMo-7 cost?
ERNiCrMo-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.
ERNiCrMo-7 — frequently asked
What is ERNiCrMo-7 used for?
ERNiCrMo-7 is typically used for chemical process piping, as-welded corrosive service equipment and flue gas desulfurization systems. In short: matched filler for C-4; as-welded corrosion resistance; no PWHT required.
What is the yield strength of ERNiCrMo-7?
ERNiCrMo-7 has a typical yield strength of 470 MPa (68.2 ksi) and a tensile strength of 720 MPa (104 ksi) — stronger than 68% of nickel alloy grades. Strength varies by condition: see the 3 listed tempers.
Is ERNiCrMo-7 easy to machine?
Not especially — machinability is rated poor (18/100, worse than 61% of nickel alloy grades). Weld metal machines like alloy C-4: gummy and work-hardening — use rigid setups, positive-rake carbide, heavy constant feed, low SFM and flood coolant; avoid dwelling.
Can ERNiCrMo-7 be welded?
Yes — weldability is rated excellent (88/100). GTAW/GMAW/PAW with 100 % Ar (Ar+He for thick sections); keep heat input below ~1.5 kJ/mm, interpass ≤ 100 °C, no preheat, stringer beads and full back-purge; clean to bright metal to avoid porosity and hot cracking.
What surface finishes work on ERNiCrMo-7?
Pickle or bead-blast plus passivation to remove heat tint — chromium-depleted oxide is the weak point for pitting; electropolishing gives the best as-welded corrosion performance.
Can ERNiCrMo-7 be formed, bent or molded?
Supplied as drawn wire; deposits are ductile enough for hammer testing and cold straightening but work-harden rapidly, so cold forming of weldments needs intermediate anneals.
What is the maximum service temperature of ERNiCrMo-7?
ERNiCrMo-7 is rated for continuous use to about 650°C (1,202 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ERNiCrMo-7-AW and ERNiCrMo-7-SA?
AW is the default condition — standard delivery condition of the joint: use when C-4 weldments must go into corrosive service without post-weld solution annealing. SA: optional PWHT that homogenizes dendritic Mo segregation and maximizes corrosion resistance and ductility in critical vessels. Yield strength is 470 MPa in AW versus 400 MPa in SA.
How much does ERNiCrMo-7 cost?
ERNiCrMo-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 — AWS (2018)
- ASTM B622/B575 — UNS N06455 (alloy C-4) chemistry and properties — ASTM (2022)
- ISO 18274 / EN — S Ni 6455 (NiCr16Mo16Ti) — ISO (2010)
- Alloy C-4 (N06455) technical data — physical and corrosion properties — VDM Metals / Haynes International (2020)
- ASM Handbook Vol.2 — Properties of Nonferrous Alloys (Ni-Cr-Mo alloys) — ASM International (1990)
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.