Nickel Alloy Nimonic 115
UNS N07115 · EN 2.4662
Nimonic 115 is a high gamma-prime Ni-Co-Cr superalloy (N07115, 2.4662) with roughly 5% Al and 4% Ti for creep and oxidation resistance in hot-section turbine parts.
Reference datasheet — Nimonic 115 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 ST+A condition
Nimonic 115 tempers and conditions
Nimonic 115 is supplied in 4 conditions, soft to hard. ST+A is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Softest practical condition, supplied when the customer will machine then age in-house. | 600 | 960 | 33 | 25 HRC | — |
As-forged / as-hot-rolled | Mill product form for re-forging or for parts that will receive the full ST+A cycle afterwards. | 720 | 1,100 | 20 | 32 HRC | 1.2 % IACS |
Investment cast, solution treated and aged | Equiaxed investment-cast blades/vanes: better creep life at temperature but lower ductility than wrought. | 800 | 1,030 | 9 | 37 HRC | — |
ST+ADefault Solution treated 1190 °C/1.5 h AC + aged 1100 °C/6 h AC | Standard supplied condition for wrought bar, billet and turbine forgings — maximum creep-rupture strength to ~1000 °C. | 865 | 1,240 | 25 | 39 HRC | — |
What is Nimonic 115?
Nimonic 115 is a high gamma-prime Ni-Co-Cr superalloy (N07115, 2.4662) with roughly 5% Al and 4% Ti for creep and oxidation resistance in hot-section turbine parts. It is chosen for blades, discs and fasteners running to 980 °C and is supplied as bar, forgings and investment castings in solution-treated-plus-aged, as-forged or cast-plus-aged condition, with 865 MPa yield, 1240 MPa tensile, 25% elongation and 39 HRC. It sits at the limit of fabricability — machinability 10, weldability 8, formability 8 — so features are ground, EDM'd or cast in. Nimonic 105 or Haynes 282 are easier to process where full 980 °C capability is not needed. Nimonic 115 has a density of 7.85 g/cm³ (0.284 lb/in³), lighter than 95% of nickel alloy grades. It melts at 1,290°C (2,354 °F). Nimonic 115 has a yield strength of 865 MPa (125 ksi) and a tensile strength of 1,240 MPa (180 ksi) — stronger than 92% of nickel alloy grades. Elongation at break is 25% and the elastic modulus is 224 GPa (32.5 Msi).
What is Nimonic 115 used for?
- turbine blades
- hot-section fasteners
- high-temperature discs
Advantages
- High strength — 865 MPa (125 ksi), better than 92% of nickel alloy grades
Limitations
- Low electrical conductivity — 1.2 % IACS, worse than 99% of nickel alloy grades
- Difficult to weld — 8/100, worse than 99% of nickel alloy grades
- Difficult to machine — 10/100, worse than 93% of nickel alloy grades
- Limited formability — 8/100, worse than 87% of nickel alloy grades
- High embodied carbon — 15 kg CO₂/kg, worse than 87% of nickel alloy grades
Nimonic 115 properties
Typical room-temperature values for Nimonic 115-ST+A; bars are the position among nickel alloy grades.
Physical3
Nimonic 115 has a density of 7.85 g/cm³ (0.284 lb/in³), lighter than 95% of nickel alloy grades. It melts at 1,290°C (2,354 °F).
Mechanical15
Nimonic 115 has a yield strength of 865 MPa (125 ksi) and a tensile strength of 1,240 MPa (180 ksi) — stronger than 92% of nickel alloy grades. Elongation at break is 25% and the elastic modulus is 224 GPa (32.5 Msi).
Thermal6
Nimonic 115 is rated for continuous service to 980°C (1,796 °F). It conducts heat at 10.7 W/m·K (6.18 BTU/hr·ft·°F), worse than 68% of nickel alloy grades. Thermal expansion is 12.2 µm/m·K (6.78 µin/in·°F).
Electrical3
Nimonic 115 conducts electricity at 1.2 % IACS, worse than 99% 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 115 takes about 210 MJ of energy and emits 15 kg of CO₂ — more than 81% of nickel alloy grades. Typical recycled content is 30%.
Manufacturability8
Nimonic 115's machinability is not recommended (10/100, worse than 93% of nickel alloy grades); weldability not recommended (8/100); formability not recommended (8/100).
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. Nimonic 115 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Nimonic 115
Is Nimonic 115 easy to machine?
Extremely difficult in the aged condition — use rigid setups, positive-rake carbide or whisker-reinforced ceramic inserts, low surface speed with high feed, flood coolant and constant depth of cut to avoid work-hardened glaze; grinding and EDM are common for blade features.
Can Nimonic 115 be welded?
Essentially non-weldable by conventional fusion methods due to ~5 % Al + ~4 % Ti (strain-age/liquation cracking); repairs use vacuum brazing, wide-gap brazing or highly controlled preheated laser/EB processes with post-weld ST+A.
Can Nimonic 115 be formed, bent or molded?
Hot work only, in a narrow 1050–1160 °C window with rapid reheating; cold forming is impractical, and investment casting is the usual route for complex airfoils.
Nimonic 115 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 |
|---|---|---|
| C | 0.12 – 0.2 | 0.15 |
| Cr | 14 – 16 | 14.3 |
| Co | 13 – 15.5 | 13.2 |
| Mo | 3 – 5 | 3.3 |
| Alprincipal γ′ former | 4.5 – 5.5 | 4.9 |
| Tiprincipal γ′ former | 3.5 – 4.5 | 3.7 |
| Fe | ≤ 1 | 0.5 |
| Mn | ≤ 1 | |
| Si | ≤ 1 | |
| Cu | ≤ 0.2 | |
| Zrgrain-boundary strengthener | 0.02 – 0.1 | 0.04 |
| Bhigh B level as listed in ASM superalloy tables; some specs limit to ≤0.02 | 0.01 – 0.2 | 0.16 |
| S | ≤ 0.02 | |
| Nibalance, ~60 % | balance |
What surface finishes work on Nimonic 115?
Typically shot-peened and coated with pack/vapour aluminide or MCrAlY for hot-section service; polishes well but passivation/anodizing is not applicable.
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 Nimonic 115 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N07115
- EN / DIN / Werkstoff-Nr.
- 2.4662
How much does Nimonic 115 cost?
Nimonic 115 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.
Nimonic 115 — frequently asked
What is Nimonic 115 used for?
Nimonic 115 is typically used for turbine blades, hot-section fasteners and high-temperature discs. In short: highest gamma-prime Nimonic; service to 980 °C; essentially non-weldable superalloy.
What is the yield strength of Nimonic 115?
Nimonic 115 has a typical yield strength of 865 MPa (125 ksi) and a tensile strength of 1,240 MPa (180 ksi) — stronger than 92% of nickel alloy grades. Strength varies by condition: see the 4 listed tempers.
Is Nimonic 115 easy to machine?
Not especially — machinability is rated not recommended (10/100, worse than 93% of nickel alloy grades). Extremely difficult in the aged condition — use rigid setups, positive-rake carbide or whisker-reinforced ceramic inserts, low surface speed with high feed, flood coolant and constant depth of cut to avoid work-hardened glaze; grinding and EDM are common for blade features.
Can Nimonic 115 be welded?
Not readily — weldability is rated not recommended (8/100). Essentially non-weldable by conventional fusion methods due to ~5 % Al + ~4 % Ti (strain-age/liquation cracking); repairs use vacuum brazing, wide-gap brazing or highly controlled preheated laser/EB processes with post-weld ST+A.
What surface finishes work on Nimonic 115?
Typically shot-peened and coated with pack/vapour aluminide or MCrAlY for hot-section service; polishes well but passivation/anodizing is not applicable.
Can Nimonic 115 be formed, bent or molded?
Hot work only, in a narrow 1050–1160 °C window with rapid reheating; cold forming is impractical, and investment casting is the usual route for complex airfoils.
What is the maximum service temperature of Nimonic 115?
Nimonic 115 is rated for continuous use to about 980°C (1,796 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Nimonic 115 ST+A and Nimonic 115-ST?
ST+A is the default condition — standard supplied condition for wrought bar, billet and turbine forgings — maximum creep-rupture strength to ~1000 °C. ST: softest practical condition, supplied when the customer will machine then age in-house. Yield strength is 865 MPa in ST+A versus 600 MPa in ST.
How much does Nimonic 115 cost?
Nimonic 115 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
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys (superalloy data) — ASM International (1990)
- Superalloys: A Technical Guide, 2nd ed. — ASM International (2002)
- Nimonic alloy series technical data — Special Metals Corporation (2020)
- UNS N07115 / Werkstoff 2.4662 designation listings — SAE/ASTM DS-56 & DIN (2019)
- GH115/Nimonic 115 (2025)
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.