Nickel Alloy 2.4878
EN 2.4878
Precipitation-hardenable Ni-Cr-Co-Mo-Ti superalloy designed for high strength and creep resistance at elevated temperature, used in bolting and turbine hardware similar in role to Waspaloy-type alloys.
Reference datasheet — 2.4878 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 +P1080 condition
2.4878 tempers and conditions
2.4878 is supplied in 5 conditions, soft to hard. +P1080 is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Choose for forming, deep machining or as raw stock before the customer's own precipitation ageing. | 450 | 900 | 40 | 220 HB | — |
As forged / hot rolled, unheat-treated stock | Semi-finished forging or billet stock intended for further hot work and a full solution + ageing cycle at the part maker. | 560 | 1,000 | 30 | 25 HRC | 1.4 % IACS |
Precipitation hardened | Choose where long-term creep and stress-relaxation resistance above ~650 °C matter more than peak room-temperature strength; the higher solution temperature coarsens the grain. | 760 | 1,190 | 20 | 34 HRC | — |
+P1080Default Precipitation hardened | Standard high-strength bolting condition: finer grain from the lower solution temperature gives the highest room-temperature proof strength. | 820 | 1,250 | 18 | 37 HRC | — |
Cold drawn / cold worked then precipitation hardened bar & wire | Small-diameter fastener and spring stock where cold work plus ageing lifts proof strength above the standard +P conditions. | 980 | 1,380 | 12 | 41 HRC | — |
What is 2.4878?
Precipitation-hardenable Ni-Cr-Co-Mo-Ti superalloy designed for high strength and creep resistance at elevated temperature, used in bolting and turbine hardware similar in role to Waspaloy-type alloys. 2.4878 has a density of 8.2 g/cm³ (0.296 lb/in³), lighter than 63% of nickel alloy grades. It melts at 1,310°C (2,390 °F). 2.4878 has a yield strength of 820 MPa (119 ksi) and a tensile strength of 1,250 MPa (181 ksi) — stronger than 87% of nickel alloy grades. Elongation at break is 18% and the elastic modulus is 213 GPa (30.9 Msi).
What is 2.4878 used for?
- gas turbine fasteners
- high-temperature bolting
- turbine hot-section hardware
Advantages
- High strength — 820 MPa (119 ksi), better than 87% of nickel alloy grades
Limitations
- Difficult to weld — 25/100, worse than 82% of nickel alloy grades
- Limited ductility — 18%, worse than 77% of nickel alloy grades
- Limited formability — 20/100, worse than 75% of nickel alloy grades
2.4878 properties
Typical room-temperature values for 2.4878-+P1080; bars are the position among nickel alloy grades.
Physical3
2.4878 has a density of 8.2 g/cm³ (0.296 lb/in³), lighter than 63% of nickel alloy grades. It melts at 1,310°C (2,390 °F).
Mechanical16
2.4878 has a yield strength of 820 MPa (119 ksi) and a tensile strength of 1,250 MPa (181 ksi) — stronger than 87% of nickel alloy grades. Elongation at break is 18% and the elastic modulus is 213 GPa (30.9 Msi).
Thermal6
2.4878 is rated for continuous service to 730°C (1,346 °F). It conducts heat at 11 W/m·K (6.36 BTU/hr·ft·°F), worse than 60% of nickel alloy grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
2.4878 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 2.4878 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
2.4878's machinability is not recommended (14/100, worse than 81% of nickel alloy grades); weldability poor (25/100); formability poor (20/100).
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. 2.4878 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 2.4878
Is 2.4878 easy to machine?
Machine preferably in the solution-annealed state with rigid setups, positive-rake carbide or ceramic tooling, low surface speed, heavy constant feed and flood coolant to avoid work hardening and glazing.
Can 2.4878 be welded?
GTAW with matched or Ni-Cr-Mo filler in the solution-annealed condition; the alloy is strain-age crack sensitive, so weld cold, minimise restraint and re-solution/age after welding.
Can 2.4878 be formed, bent or molded?
Hot work between about 1100 and 950 °C; cold forming is only practical in the +AT condition and requires high press loads plus intermediate annealing.
2.4878 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 |
|---|---|---|
| Ccarbide former for grain-boundary strength | 0.03 – 0.1 | 0.06 |
| Croxidation/hot corrosion resistance | 23 – 26 | 25 |
| Co | 18 – 22 | 20 |
| Mosolid-solution strengthening | 3 – 5 | 4 |
| Tiγ′ former | 1.8 – 2.7 | 2.3 |
| Alγ′ former | 0.8 – 1.6 | 1.2 |
| Feresidual | ≤ 2 | 0.8 |
| Mn | ≤ 1 | 0.3 |
| Si | ≤ 1 | 0.3 |
| Bcreep-ductility micro-addition | 0 – 0.01 | 0.01 |
| Zr | ≤ 0.1 | 0.03 |
| Cu | ≤ 0.2 | — |
| S | ≤ 0.02 | — |
| P | ≤ 0.02 | — |
| Nibalance, typically 43–50 % | balance | — |
What surface finishes work on 2.4878?
Not anodizable — use pickling/passivation, electropolishing, shot peening of thread roots for fatigue life, or aluminide/thermal-barrier coatings for hot-gas service.
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 2.4878 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- NiCr25Co20TiMo
How much does 2.4878 cost?
2.4878 is a high-cost nickel alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
2.4878 — frequently asked
What is 2.4878 used for?
2.4878 is typically used for gas turbine fasteners, high-temperature bolting and turbine hot-section hardware. In short: waspaloy-class bolting alloy; 1250 MPa at 730 °C service; hardest to machine of family.
What is the yield strength of 2.4878?
2.4878 has a typical yield strength of 820 MPa (119 ksi) and a tensile strength of 1,250 MPa (181 ksi) — stronger than 87% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is 2.4878 easy to machine?
Not especially — machinability is rated not recommended (14/100, worse than 81% of nickel alloy grades). Machine preferably in the solution-annealed state with rigid setups, positive-rake carbide or ceramic tooling, low surface speed, heavy constant feed and flood coolant to avoid work hardening and glazing.
Can 2.4878 be welded?
Not readily — weldability is rated poor (25/100). GTAW with matched or Ni-Cr-Mo filler in the solution-annealed condition; the alloy is strain-age crack sensitive, so weld cold, minimise restraint and re-solution/age after welding.
What surface finishes work on 2.4878?
Not anodizable — use pickling/passivation, electropolishing, shot peening of thread roots for fatigue life, or aluminide/thermal-barrier coatings for hot-gas service.
Can 2.4878 be formed, bent or molded?
Hot work between about 1100 and 950 °C; cold forming is only practical in the +AT condition and requires high press loads plus intermediate annealing.
What is the maximum service temperature of 2.4878?
2.4878 is rated for continuous use to about 730°C (1,346 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 2.4878 cost?
2.4878 is a high-cost nickel alloy ($$$$), 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
- EN 10269 — Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties — CEN (2013)
- EN 10302 — Creep resisting steels, nickel and cobalt alloys — CEN (2008)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys (Ni-base superalloys) — ASM International (1990)
- Superalloys: A Technical Guide, 2nd ed. — ASM International (2002)
- Nickel-base precipitation-hardening bolting alloy datasheets (Waspaloy / Nimonic 90 class) — Special Metals / Böhler (2020)
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.