Nickel Alloy Rene 95 EXT+IF
Heat-treated state
UNS N07095 · also 5713
EXT+IF = extruded + isothermally forged (P/M) and heat treated
Highest-integrity disk route: extrusion breaks up prior-particle boundaries and gives the finest, most uniform grain and best LCF life.
Values for the EXT+IF condition
Other Rene 95 tempers and conditions
Rene 95 is listed in 5 conditions; see the grade overview at Rene 95.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
coarse grain | Choose when creep and dwell crack-growth resistance at the disk rim matter more than peak tensile/LCF strength. | 1,100 | 1,500 | 14 | 42 HRC | 1.3 % IACS |
Powder consolidated by hot isostatic pressing, no further solution… | Pick for near-net HIP preforms where full disk-grade heat treatment is applied later, or for less critical hardware. | 1,120 | 1,520 | 13 | 41 HRC | 1.3 % IACS |
Cast + wrought (conventionally cast ingot, forged) and heat treated | Legacy ingot-metallurgy route, only for small sections — segregation and narrow forging window limit size and consistency. | 1,200 | 1,570 | 13 | 44 HRC | 1.3 % IACS |
HIP+HTDefault HIP + sub-solvus solution and age | Standard supplied disk condition: fine ASTM 10–12 grain size for maximum tensile and low-cycle-fatigue strength to 650 °C. | 1,240 | 1,620 | 15 | 45 HRC | — |
EXT+IFThis page Extruded + isothermally forged (P/M) and heat treated | Highest-integrity disk route: extrusion breaks up prior-particle boundaries and gives the finest, most uniform grain and best LCF life. | 1,310 | 1,690 | 17 | 47 HRC | — |
What is Rene 95 EXT+IF?
Rene 95 EXT+IF is Rene 95 heat treated to EXT+IF — highest-integrity disk route: extrusion breaks up prior-particle boundaries and gives the finest, most uniform grain and best LCF life. Rene 95 EXT+IF has a yield strength of 1,310 MPa (190 ksi) and a tensile strength of 1,690 MPa (245 ksi) — stronger than 100% of nickel alloy grades. Elongation at break is 17% and the elastic modulus is 210 GPa (30.5 Msi). Rene 95 EXT+IF has a density of 8.19 g/cm³ (0.296 lb/in³), lighter than 68% of nickel alloy grades. It melts at 1,260°C (2,300 °F). HIP+HT is the default condition FabDigit quotes; EXT+IF is available on request or by drawing note.
Advantages
- High strength — 1,310 MPa (190 ksi), better than 100% of nickel alloy grades
Limitations
- Difficult to weld — 8/100, worse than 99% of nickel alloy grades
- Poor heat conductor — 8.9 W/m·K (5.14 BTU/hr·ft·°F), worse than 98% of nickel alloy grades
- High embodied carbon — 17 kg CO₂/kg, worse than 96% of nickel alloy grades
- Limited formability — 5/100, worse than 91% of nickel alloy grades
- Low fracture toughness — 62 MPa·√m (56.4 ksi·√in), worse than 88% of nickel alloy grades
Rene 95 EXT+IF properties
Typical room-temperature values for Rene 95 EXT+IF; 10 are specific to this condition. Other listed values are Rene 95 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
Rene 95 EXT+IF has a density of 8.19 g/cm³ (0.296 lb/in³), lighter than 68% of nickel alloy grades. It melts at 1,260°C (2,300 °F).
Mechanical13
Rene 95 EXT+IF has a yield strength of 1,310 MPa (190 ksi) and a tensile strength of 1,690 MPa (245 ksi) — stronger than 100% of nickel alloy grades. Elongation at break is 17% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
Rene 95 EXT+IF is rated for continuous service to 650°C (1,202 °F). It conducts heat at 8.9 W/m·K (5.14 BTU/hr·ft·°F), worse than 98% of nickel alloy grades. Thermal expansion is 11.7 µm/m·K (6.5 µin/in·°F).
Electrical3
Rene 95 EXT+IF conducts electricity at 1.3 % IACS, worse than 89% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), worse than 85% of nickel alloy grades.
Sustainability4
Producing a kilogram of Rene 95 EXT+IF takes about 280 MJ of energy and emits 17 kg of CO₂ — more than 98% of nickel alloy grades. Typical recycled content is 10%.
Manufacturability7
Rene 95 EXT+IF's machinability is not recommended (11/100, worse than 90% of nickel alloy grades); weldability not recommended (8/100); formability not recommended (5/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Rene 95 EXT+IF
Is Rene 95 easy to machine?
Very difficult: use rigid setups, whisker/SiAlON or coated-carbide inserts, low surface speeds (20–35 m/min carbide), heavy flood coolant, and control residual stress/white layer on fatigue-critical surfaces.
Can Rene 95 be welded?
Effectively non-weldable by fusion due to ~3.5 Al + 2.5 Ti strain-age cracking; repairs limited to specialised diffusion/braze or solid-state (inertia/linear friction) joining with post-bond heat treatment.
Can Rene 95 be formed, bent or molded?
No cold forming — the alloy is shaped by HIP of pre-alloyed powder, extrusion and isothermal forging near 1100 °C at low strain rates in the sub-solvus window.
What surface finishes work on Rene 95?
Shot-peen or low-plasticity burnish fatigue-critical surfaces; can be diffusion-coated or aluminised for oxidation, and takes a fine mechanical/electrolytic polish; no anodising.
Rene 95 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 | 0.04 – 0.09 | 0.07 |
| Cr | 12 – 14 | 13 |
| Co | 7 – 9 | 8 |
| Mo | 3.3 – 3.7 | 3.5 |
| W | 3.3 – 3.7 | 3.5 |
| NbNb+Ta | 3.3 – 3.7 | 3.5 |
| Alγ′ former | 3.3 – 3.7 | 3.5 |
| Tiγ′ former | 2.3 – 2.7 | 2.5 |
| Bgrain-boundary strengthener | 0.01 – 0.02 | 0.01 |
| Zr | 0.03 – 0.07 | 0.05 |
| Fe | ≤ 0.5 | — |
| Opowder oxygen, typical control limit | ≤ 0.01 | 0.01 |
| Ni | balance | — |
Rene 95 EXT+IF — frequently asked
What is Rene 95 EXT+IF used for?
Rene 95 EXT+IF is typically used for turbine disks, aerospace rotating hardware, compressor disks and spacers, blisks and rotor hubs, seal rings and retaining rings and shaft and coupling components for gas turbines. In short: highest-strength PM disk alloy; sub-solvus isothermal forging; 650 °C service limit.
What is the yield strength of Rene 95 EXT+IF?
Rene 95 EXT+IF has a typical yield strength of 1,310 MPa (190 ksi) and a tensile strength of 1,690 MPa (245 ksi) — stronger than 100% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is Rene 95 EXT+IF easy to machine?
Not especially — machinability is rated not recommended (11/100, worse than 90% of nickel alloy grades). Very difficult: use rigid setups, whisker/SiAlON or coated-carbide inserts, low surface speeds (20–35 m/min carbide), heavy flood coolant, and control residual stress/white layer on fatigue-critical surfaces.
Can Rene 95 EXT+IF be welded?
Not readily — weldability is rated not recommended (8/100). Effectively non-weldable by fusion due to ~3.5 Al + 2.5 Ti strain-age cracking; repairs limited to specialised diffusion/braze or solid-state (inertia/linear friction) joining with post-bond heat treatment.
What surface finishes work on Rene 95 EXT+IF?
Shot-peen or low-plasticity burnish fatigue-critical surfaces; can be diffusion-coated or aluminised for oxidation, and takes a fine mechanical/electrolytic polish; no anodising.
Can Rene 95 EXT+IF be formed, bent or molded?
No cold forming — the alloy is shaped by HIP of pre-alloyed powder, extrusion and isothermal forging near 1100 °C at low strain rates in the sub-solvus window.
What is the maximum service temperature of Rene 95 EXT+IF?
Rene 95 EXT+IF 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 Rene 95 HIP+HT and Rene 95 AS-HIP?
HIP+HT is the default condition — standard supplied disk condition: fine ASTM 10–12 grain size for maximum tensile and low-cycle-fatigue strength to 650 °C. AS-HIP: pick for near-net HIP preforms where full disk-grade heat treatment is applied later, or for less critical hardware. Yield strength is 1,240 MPa in HIP+HT versus 1,120 MPa in AS-HIP.
Sources
- AMS 5713 — Nickel Alloy, Powder Metallurgy Products — SAE International (2018)
- Superalloys II: High-Temperature Materials for Aerospace and Industrial Power — Wiley (1987)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Specialty Handbook: Heat-Resistant Materials — ASM International (1997)
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.