Rene 41, UNS N07041, is a gamma prime strengthened nickel superalloy with very high strength at temperature, usable to roughly 1600F. It outperforms alloy 718 and Waspaloy in short term strength at high temperature and is used where that margin is needed.
The alloy is sensitive to strain age cracking, so fabrication sequence, welding condition and post weld heat treatment matter more than with 718.
Stocked as bar, sheet and forgings in the solution treated or solution treated and aged condition.
Sizes and stock
- Round bar: up to 3.5" DIA
- Sheet: up to .050" THK
- Forgings: by request
Processing capabilities
- Billet conversion and open die, closed die and ring forging
- Solution treat, age and anneal to the applicable spec
- Saw cutting, trepanning, gun drilling and CNC machining
- Ultrasonic, penetrant dye, micrography and physical testing
Specifications
Material is released to the applicable specification with mill test reports and, on request, independent lab verification.
Why engineers specify Rene 41
- Very high strength at elevated temperature
- Good oxidation resistance to about 1600F
- Established in hot section hardware and fasteners
- Available solution treated for fabrication then aged
Nominal chemistry
Percent by weight, nominal composition per the governing specification. The mill test report for your heat is the controlling document.
Typical mechanical properties
| Condition | Tensile strength | Yield strength | Elongation | Hardness |
|---|---|---|---|---|
| Solution treated | ~140 ksi | ~85 ksi | ~30% | - |
| Solution treated and aged | 180 ksi min | 130 ksi min | 10% min | - |
Typical published values for reference only, not for design. Properties vary with section size, product form and processing. Order to the specification and condition your drawing requires.
Typical applications
- Hot section structural hardware
- High temperature bolts and fasteners
- Afterburner components
- Missile and rocket structure
Fabrication notes
Machining
Nickel and cobalt superalloys work harden aggressively. Use rigid setups, sharp tooling, slow speeds, positive feed that stays under the hardened skin, and flood coolant. Age hardened material machines far more slowly than solution treated material, so rough before aging wherever the print allows.
Welding
Most solid solution grades weld readily with matching filler. Age hardenable grades such as 718 and Waspaloy are welded in the solution treated condition and aged afterward to control strain age cracking.
Forming
Hot working ranges are narrow and forces are high. Cold form in the annealed condition with intermediate anneals, and stress relieve before final heat treatment.
Rene 41 compared with similar grades
Waspaloy
Somewhat lower strength but easier to process for rotating parts.
Alloy 718
Far easier to weld, limited to lower temperature.
Designations and cross reference
- Material family
- Nickel & Cobalt Alloys
- UNS number
- N07041
- Werkstoff (W.Nr)
- 2.4973
Working from an obsolete, foreign or superseded designation? Send it over and we will cross reference it to a current grade and specification.
Quality, testing and traceability
Supplied with mill test reports and heat traceability, with ultrasonic inspection, penetrant dye, micrography, grain size, stress rupture and mechanical testing available on request.
We are AS9100D and ISO 9001:2015 registered. If our stock does not already carry the inspection your specification requires, we can quote the material with that work performed. More on our quality system
Available forms
Custom sizes converted from billet, plus saw cut, waterjet and near-net blanks. See custom conversions
Rene 41 frequently asked questions
What is Rene 41?
Rene 41, UNS N07041, is a gamma prime strengthened nickel superalloy with very high strength at temperature, usable to roughly 1600F. It outperforms alloy 718 and Waspaloy in short term strength at high temperature and is used where that margin is needed.
What forms is Rene 41 available in?
We supply Rene 41 in bar, sheet, forging. Custom sizes are converted from billet, and we can provide saw cut, waterjet or near net blanks so material arrives closer to your finished part.
What is the UNS or equivalent designation for Rene 41?
Rene 41 is designated UNS N07041, Werkstoff 2.4973. If your drawing calls out an obsolete or foreign designation we can cross reference it and confirm the equivalent before you order.
What specifications can Rene 41 be supplied to?
Commonly ordered specifications include AMS 5545, AMS 5712, AMS 5713, AMS 5800, B50T59, N60T69. Material is released to the specification and condition on your purchase order, with mill test reports supplied as standard.
What conditions can Rene 41 be ordered in?
We can supply Solution treated, Solution treated and aged. If our stock is not already in the condition you need, we can quote it with the heat treatment performed before shipment.
Can you cut Rene 41 to size?
Yes. Saw cutting, waterjet, laser and shearing are available, along with trepanning, gun drilling, lathe turning and CNC machining, so you can order blanks or rough machined pieces rather than full lengths.
Do you provide test reports and additional testing on Rene 41?
Every order ships with mill test reports and heat traceability. If your print calls for ultrasonic inspection, penetrant dye, magnetic particle, chemical assay, micrography, hardness or mechanical testing and our stock does not already carry it, we can quote the material with that work performed.
Can Rene 41 be supplied to DFARS domestic melt requirements?
Tell us at quote stage if the order is DFARS or domestic melt restricted and we will confirm availability against that requirement before you commit.
What do you need to quote Rene 41?
Grade, form, dimensions, quantity, specification and condition, plus any testing or certification requirements and the date you need it. Send a drawing if you have one. Quotes are typically ready within 24 hours.
How does Rene 41 compare with Waspaloy?
Somewhat lower strength but easier to process for rotating parts.