Nickel Alloy Nimonic 105
EN 2.4634
Nimonic 105 is a precipitation-hardened Ni-Co-Cr-Mo superalloy (2.4634) strengthened by gamma-prime formed from its aluminium and titanium content.
Reference datasheet — Nimonic 105 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 STA condition
Nimonic 105 tempers and conditions
Nimonic 105 is supplied in 4 conditions, soft to hard. STA 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 supplied condition — choose for machining, forming or welding before final ageing. | 500 | 860 | 35 | 22 HRC | — |
As hot forged / hot rolled bar | Mill product condition for forging stock and re-heat-treatment; properties are non-guaranteed until solution treated and aged. | 650 | 1,000 | 25 | 30 HRC | 1.4 % IACS |
Solution treated + single age | Shortened ageing cycle used for thinner sections and fasteners; slightly lower creep strength than the double-aged cycle. | 770 | 1,100 | 24 | 34 HRC | 1.3 % IACS |
STADefault Solution treated and aged | Standard fully heat-treated condition for turbine discs, blades and hot bolting — maximum creep and tensile strength. | 810 | 1,150 | 22 | 36 HRC | — |
What is Nimonic 105?
Nimonic 105 is a precipitation-hardened Ni-Co-Cr-Mo superalloy (2.4634) strengthened by gamma-prime formed from its aluminium and titanium content. Engineers select it where creep strength is required to about 950 °C; it is supplied as bar, forgings and discs in solution-treated, solution-treated-and-aged, or hot-finished condition, with typical values of 810 MPa yield, 1150 MPa tensile, 22% elongation and 333 HB (36 HRC). The trade-off is fabricability: machinability scores 12, weldability 15 and formability 12, so parts are forged and ground rather than fabricated. Haynes 282 is the practical alternative when welding is required. Nimonic 105 has a density of 8 g/cm³ (0.289 lb/in³), lighter than 85% of nickel alloy grades. It melts at 1,290°C (2,354 °F). Nimonic 105 has a yield strength of 810 MPa (117 ksi) and a tensile strength of 1,150 MPa (167 ksi) — stronger than 84% of nickel alloy grades. Elongation at break is 22% and the elastic modulus is 222 GPa (32.2 Msi).
What is Nimonic 105 used for?
- turbine discs
- turbine blades
- high-temperature fasteners
Advantages
- High strength — 810 MPa (117 ksi), better than 84% of nickel alloy grades
Limitations
- High embodied carbon — 16 kg CO₂/kg, worse than 93% of nickel alloy grades
- Difficult to weld — 15/100, worse than 87% of nickel alloy grades
- Limited formability — 12/100, worse than 83% of nickel alloy grades
Nimonic 105 properties
Typical room-temperature values for Nimonic 105-STA; bars are the position among nickel alloy grades.
Physical3
Nimonic 105 has a density of 8 g/cm³ (0.289 lb/in³), lighter than 85% of nickel alloy grades. It melts at 1,290°C (2,354 °F).
Mechanical15
Nimonic 105 has a yield strength of 810 MPa (117 ksi) and a tensile strength of 1,150 MPa (167 ksi) — stronger than 84% of nickel alloy grades. Elongation at break is 22% and the elastic modulus is 222 GPa (32.2 Msi).
Thermal5
Nimonic 105 is rated for continuous service to 950°C (1,742 °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 11.8 µm/m·K (6.56 µin/in·°F).
Electrical2
Nimonic 105 has an electrical resistivity of 1.3×10⁻⁶ Ω·m.
Chemical & Environmental3
Corrosion resistance is very good (70/100), worse than 77% of nickel alloy grades.
Sustainability4
Producing a kilogram of Nimonic 105 takes about 235 MJ of energy and emits 16 kg of CO₂ — more than 94% of nickel alloy grades. Typical recycled content is 30%.
Manufacturability8
Nimonic 105's machinability is not recommended (12/100, worse than 86% of nickel alloy grades); weldability poor (15/100); formability not recommended (12/100).
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 105 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Nimonic 105
Is Nimonic 105 easy to machine?
Machine in the solution-treated condition where possible; rigid setups, low speeds with carbide or SiAlON ceramic inserts, heavy positive feed and flood coolant to avoid work hardening and glazing.
Can Nimonic 105 be welded?
High Al+Ti content makes it prone to strain-age and HAZ liquation cracking — weld only in solution-treated condition (GTAW/EB), minimise restraint, and re-solution + re-age afterwards.
Can Nimonic 105 be formed, bent or molded?
Hot work between about 1080 and 1150 °C with light finishing reductions; cold forming is very limited and needs intermediate solution anneals.
Nimonic 105 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 |
|---|---|---|
| Co | 18 – 22 | 20 |
| Cr | 14 – 15.7 | 14.8 |
| Mo | 4.5 – 5.5 | 5 |
| Al | 4.5 – 4.9 | 4.7 |
| Ti | 0.9 – 1.5 | 1.2 |
| C | 0.08 – 0.2 | 0.13 |
| Fe | ≤ 1 | 0.3 |
| Mn | ≤ 1 | 0.1 |
| Si | ≤ 1 | 0.2 |
| Cu | ≤ 0.2 | 0.05 |
| B | 0 – 0.01 | 0.01 |
| Zr | ≤ 0.15 | 0.1 |
| S | ≤ 0.02 | |
| Nibalance, typically ~53% | balance |
What surface finishes work on Nimonic 105?
No anodising; use grinding/polishing, shot peening for fatigue life, and aluminide or MCrAlY diffusion coatings for service above ~900 °C.
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 105 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 2.4634
How much does Nimonic 105 cost?
Nimonic 105 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 105 — frequently asked
What is Nimonic 105 used for?
Nimonic 105 is typically used for turbine discs, turbine blades and high-temperature fasteners. In short: creep strength to 950 °C; forged rotating-part superalloy; very low machinability rating.
What is the yield strength of Nimonic 105?
Nimonic 105 has a typical yield strength of 810 MPa (117 ksi) and a tensile strength of 1,150 MPa (167 ksi) — stronger than 84% of nickel alloy grades. Strength varies by condition: see the 4 listed tempers.
Is Nimonic 105 easy to machine?
Not especially — machinability is rated not recommended (12/100, worse than 86% of nickel alloy grades). Machine in the solution-treated condition where possible; rigid setups, low speeds with carbide or SiAlON ceramic inserts, heavy positive feed and flood coolant to avoid work hardening and glazing.
Can Nimonic 105 be welded?
Not readily — weldability is rated poor (15/100). High Al+Ti content makes it prone to strain-age and HAZ liquation cracking — weld only in solution-treated condition (GTAW/EB), minimise restraint, and re-solution + re-age afterwards.
What surface finishes work on Nimonic 105?
No anodising; use grinding/polishing, shot peening for fatigue life, and aluminide or MCrAlY diffusion coatings for service above ~900 °C.
Can Nimonic 105 be formed, bent or molded?
Hot work between about 1080 and 1150 °C with light finishing reductions; cold forming is very limited and needs intermediate solution anneals.
What is the maximum service temperature of Nimonic 105?
Nimonic 105 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 Nimonic 105-STA and Nimonic 105-ST?
STA is the default condition — standard fully heat-treated condition for turbine discs, blades and hot bolting — maximum creep and tensile strength. ST: softest supplied condition — choose for machining, forming or welding before final ageing. Yield strength is 810 MPa in STA versus 500 MPa in ST.
How much does Nimonic 105 cost?
Nimonic 105 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
- Nimonic alloy 105 technical data — Special Metals Corporation (Henry Wiggin) (2004)
- BS HR3 / DIN 17742 material 2.4634 (NiCo20Cr15MoAlTi) — BSI / DIN (1999)
- ASM Handbook Vol. 1: Properties and Selection — Superalloys — ASM International (1990)
- Superalloys: A Technical Guide, 2nd ed. — ASM International (2002)
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.