Nickel Alloy Nimonic 86-HF (Hot Finished / Hot Rolled)
Grade
UNS N12160 · EN 2.4880
Heavy bar, billet and forgings delivered directly from hot work when subsequent machining and a final solution anneal are planned.
Values for the HF condition
Other Nimonic 86 tempers and conditions
Nimonic 86 is listed in 5 conditions; see the grade overview at Nimonic 86.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SADefault Solution Annealed | Standard supply condition for plate, sheet, bar and tube — maximum ductility, corrosion resistance and formability before service. | 380 | 800 | 48 | 195 HB | — |
As-welded deposit | Properties of all-weld-metal deposits used when qualifying joints in Nimonic 86 fabrications without post-weld solution treatment. | 420 | 760 | 35 | 210 HB | 1.4 % IACS |
HFThis page Hot Finished / Hot Rolled | Heavy bar, billet and forgings delivered directly from hot work when subsequent machining and a final solution anneal are planned. | 450 | 850 | 40 | 17 HRC | 1.4 % IACS |
Cold drawn | Choose for close-tolerance bar and wire where higher proof strength and a bright finish are needed at moderate service temperature. | 700 | 950 | 25 | 25 HRC | 1.4 % IACS |
Cold Rolled Hard | Spring-hard strip and thin sheet for stampings and clips that will not be re-annealed; limited to lower temperatures because of recovery/recrystallisation. | 900 | 1,100 | 8 | 32 HRC | 1.4 % IACS |
What is Nimonic 86-HF?
Nimonic 86-HF is Nimonic 86 in the HF grade — heavy bar, billet and forgings delivered directly from hot work when subsequent machining and a final solution anneal are planned. Nimonic 86-HF has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 850 MPa (123 ksi) — stronger than 66% of nickel alloy grades. Elongation at break is 40% and the elastic modulus is 218 GPa (31.6 Msi). Nimonic 86-HF has a density of 8.5 g/cm³ (0.307 lb/in³), heavier than 64% of nickel alloy grades. It melts at 1,330°C (2,426 °F). SA is the default condition FabDigit quotes; HF is available on request or by drawing note.
Advantages
- High service temperature — 1,100°C (2,012 °F), better than 88% of nickel alloy grades
Nimonic 86-HF properties
Typical room-temperature values for Nimonic 86-HF; 22 are specific to this condition. Other listed values are Nimonic 86 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
Nimonic 86-HF has a density of 8.5 g/cm³ (0.307 lb/in³), heavier than 64% of nickel alloy grades. It melts at 1,330°C (2,426 °F).
Mechanical14
Nimonic 86-HF has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 850 MPa (123 ksi) — stronger than 66% of nickel alloy grades. Elongation at break is 40% and the elastic modulus is 218 GPa (31.6 Msi).
Thermal6
Nimonic 86-HF is rated for continuous service to 1,100°C (2,012 °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 12.2 µm/m·K (6.78 µin/in·°F).
Electrical3
Nimonic 86-HF conducts electricity at 1.4 % IACS, worse than 65% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 51% of nickel alloy grades.
Sustainability4
Producing a kilogram of Nimonic 86-HF takes about 200 MJ of energy and emits 14.5 kg of CO₂ — more than 78% of nickel alloy grades. Typical recycled content is 40%.
Manufacturability8
Nimonic 86-HF's machinability is poor (20/100, better than 53% of nickel alloy grades); weldability very good (72/100); formability fair (50/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Nimonic 86-HF
Is Nimonic 86 easy to machine?
Machine like a gummy solid-solution Ni alloy: rigid setups, sharp positive-rake carbide, 15–30 m/min, heavy constant feed to cut under the work-hardened layer, and copious high-pressure coolant.
Can Nimonic 86 be welded?
Readily welded by GTAW/GMAW/PAW with matching or Ni-Cr-Mo filler; no γ′ so strain-age cracking is not a concern, but keep interpass temperature low and heat input modest to limit hot cracking and σ-phase.
Can Nimonic 86 be formed, bent or molded?
Hot work at 1150–1200 °C and cold form with ~2× the force needed for stainless; interstage annealing at ~1150 °C followed by rapid cooling restores ductility.
What surface finishes work on Nimonic 86?
Not anodisable — pickle in nitric-hydrofluoric or blast-and-passivate after heat treatment; electropolishing or mechanical polishing gives a durable bright surface, and no plating is needed for oxidation service.
Nimonic 86 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 | 24 – 26 | 25 |
| Mo | 9 – 11 | 10 |
| C | 0.03 – 0.1 | 0.05 |
| Cerare-earth addition for oxide-scale adhesion | 0.02 – 0.1 | 0.05 |
| Fe | ≤ 1 | 0.3 |
| Mn | ≤ 1 | 0.3 |
| Si | ≤ 0.4 | 0.2 |
| Ti | ≤ 0.2 | 0.05 |
| Al | ≤ 0.2 | 0.05 |
| Cu | ≤ 0.2 | 0.05 |
| S | ≤ 0.02 | 0 |
| P | ≤ 0.02 | 0.01 |
| Nibalance, typically ~63 % | balance | — |
Nimonic 86-HF — frequently asked
What is Nimonic 86-HF used for?
Nimonic 86-HF is typically used for gas turbine combustion chambers, afterburner and hot-section sheet parts, high-temperature springs and fasteners and aerospace exhaust components. In short: 1100 °C oxidation service; weldable solid-solution nickel; sheet-fabrication superalloy.
What is the yield strength of Nimonic 86-HF?
Nimonic 86-HF has a typical yield strength of 450 MPa (65.3 ksi) and a tensile strength of 850 MPa (123 ksi) — stronger than 66% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is Nimonic 86-HF easy to machine?
Not especially — machinability is rated poor (20/100, better than 53% of nickel alloy grades). Machine like a gummy solid-solution Ni alloy: rigid setups, sharp positive-rake carbide, 15–30 m/min, heavy constant feed to cut under the work-hardened layer, and copious high-pressure coolant.
Can Nimonic 86-HF be welded?
Yes — weldability is rated very good (72/100). Readily welded by GTAW/GMAW/PAW with matching or Ni-Cr-Mo filler; no γ′ so strain-age cracking is not a concern, but keep interpass temperature low and heat input modest to limit hot cracking and σ-phase.
What surface finishes work on Nimonic 86-HF?
Not anodisable — pickle in nitric-hydrofluoric or blast-and-passivate after heat treatment; electropolishing or mechanical polishing gives a durable bright surface, and no plating is needed for oxidation service.
Can Nimonic 86-HF be formed, bent or molded?
Hot work at 1150–1200 °C and cold form with ~2× the force needed for stainless; interstage annealing at ~1150 °C followed by rapid cooling restores ductility.
What is the maximum service temperature of Nimonic 86-HF?
Nimonic 86-HF is rated for continuous use to about 1,100°C (2,012 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Nimonic 86-SA and Nimonic 86 CR-H?
SA is the default condition — standard supply condition for plate, sheet, bar and tube — maximum ductility, corrosion resistance and formability before service. CR-H: spring-hard strip and thin sheet for stampings and clips that will not be re-annealed; limited to lower temperatures because of recovery/recrystallisation. Yield strength is 380 MPa in SA versus 900 MPa in CR-H.
Sources
- Nimonic alloy series technical data — Special Metals Corporation (2020)
- Werkstoff 2.4880 (NiCr25Mo10) material designation — DIN/Stahl-Eisen-Liste (2017)
- ASM Handbook Vol. 1: Properties and Selection — Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol. 13B: Corrosion — Materials — ASM International (2005)
- 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.