Nickel Alloy Rene 41-AW (As-welded deposit)
Heat-treated state
UNS N07041 · EN 2.4973 · also Nicrofer 4722 Co
Joint-property condition for welded sheet structures; weld in the solution-annealed state, then re-solution if possible and age.
Values for the AW condition
Other Rene 41 tempers and conditions
Rene 41 is listed in 5 conditions; see the grade overview at Rene 41.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
High solution anneal 1150–1180 °C | Coarse-grain high-temperature solution treatment used when creep-rupture life above 870 °C matters more than room-temperature strength. | 590 | 930 | 35 | 22 HRC | — |
Solution annealed 1065–1080 °C, rapid cool | Mill-supplied condition for sheet, bar and wire: softest state for forming, machining and welding before ageing. | 655 | 1,000 | 30 | 26 HRC | — |
High solution 1150–1180 °C + aged 900 °C / 4 h | Pick when long-term creep and stress-rupture life at 870–980 °C is the design driver and lower RT strength is acceptable. | 900 | 1,310 | 16 | 35 HRC | — |
AWThis page As-welded deposit | Joint-property condition for welded sheet structures; weld in the solution-annealed state, then re-solution if possible and age. | 930 | 1,250 | 8 | 36 HRC | 1.3 % IACS |
STADefault Solution treated and aged | Standard service condition giving peak room- to 760 °C strength for casings, fasteners and springs. | 1,060 | 1,420 | 14 | 38 HRC | — |
What is Rene 41-AW?
Rene 41-AW is Rene 41 heat treated to AW — joint-property condition for welded sheet structures; weld in the solution-annealed state, then re-solution if possible and age. Rene 41-AW has a yield strength of 930 MPa (135 ksi) and a tensile strength of 1,250 MPa (181 ksi) — stronger than 94% of nickel alloy grades. Elongation at break is 8% and the elastic modulus is 218 GPa (31.6 Msi). Rene 41-AW has a density of 8.25 g/cm³ (0.298 lb/in³), lighter than 58% of nickel alloy grades. It melts at 1,315°C (2,399 °F). STA is the default condition FabDigit quotes; AW is available on request or by drawing note.
Advantages
- High strength — 930 MPa (135 ksi), better than 94% of nickel alloy grades
Limitations
- Poor heat conductor — 9 W/m·K (5.2 BTU/hr·ft·°F), worse than 97% of nickel alloy grades
- High embodied carbon — 17 kg CO₂/kg, worse than 96% of nickel alloy grades
- Difficult to machine — 10/100, worse than 93% of nickel alloy grades
- Limited ductility — 8%, worse than 87% of nickel alloy grades
- Limited formability — 8/100, worse than 87% of nickel alloy grades
Rene 41-AW properties
Typical room-temperature values for Rene 41-AW; 22 are specific to this condition. Other listed values are Rene 41 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
Rene 41-AW has a density of 8.25 g/cm³ (0.298 lb/in³), lighter than 58% of nickel alloy grades. It melts at 1,315°C (2,399 °F).
Mechanical16
Rene 41-AW has a yield strength of 930 MPa (135 ksi) and a tensile strength of 1,250 MPa (181 ksi) — stronger than 94% of nickel alloy grades. Elongation at break is 8% and the elastic modulus is 218 GPa (31.6 Msi).
Thermal6
Rene 41-AW is rated for continuous service to 815°C (1,499 °F). It conducts heat at 9 W/m·K (5.2 BTU/hr·ft·°F), worse than 97% of nickel alloy grades. Thermal expansion is 12.1 µm/m·K (6.72 µin/in·°F).
Electrical3
Rene 41-AW conducts electricity at 1.3 % IACS, worse than 89% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (74/100), worse than 66% of nickel alloy grades.
Sustainability4
Producing a kilogram of Rene 41-AW takes about 230 MJ of energy and emits 17 kg of CO₂ — more than 91% of nickel alloy grades. Typical recycled content is 35%.
Manufacturability8
Rene 41-AW's machinability is not recommended (10/100, worse than 93% of nickel alloy grades); weldability fair (35/100); formability not recommended (8/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Rene 41-AW
Is Rene 41 easy to machine?
Machine in the solution-annealed state where possible: rigid setups, positive-rake carbide or ceramic inserts, ~10–20 m/min with carbide, heavy constant feed and flood coolant to avoid work-hardened glazing.
Can Rene 41 be welded?
GTAW/EBW with matching AMS 5800 filler on solution-annealed material only; low heat input, no preheat, and re-solution before ageing to avoid strain-age (post-weld heat treatment) cracking.
Can Rene 41 be formed, bent or molded?
Cold form only in the solution-annealed condition with high-tonnage presses and generous radii; hot working is done at 1010–1120 °C with tight temperature control, and ageing must follow all forming.
What surface finishes work on Rene 41?
Not anodizable; grit-blast plus pickling or electropolish for scale removal, and use aluminide/diffusion or thermal-barrier coatings for very high-temperature oxidation service.
Rene 41 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 | 0.06 – 0.12 | 0.09 |
| Cr | 18 – 20 | 19 |
| Co | 10 – 12 | 11 |
| Mo | 9 – 10.5 | 9.75 |
| Tiγ′ former | 3 – 3.3 | 3.15 |
| Alγ′ former | 1.4 – 1.8 | 1.6 |
| Bgrain-boundary strengthener | 0 – 0.01 | 0.01 |
| Fe | ≤ 5 | 1 |
| Mn | ≤ 0.1 | — |
| Si | ≤ 0.5 | — |
| Cu | ≤ 0.5 | — |
| S | ≤ 0.02 | — |
| Nibalance, ~52 % | balance | — |
Rene 41-AW — frequently asked
What is Rene 41-AW used for?
Rene 41-AW is typically used for turbine casings, jet engine hot-section parts, aerospace fasteners and high-temperature springs. In short: strength to 980 °C; hardest superalloy to fabricate; aerospace hot-structure grade.
What is the yield strength of Rene 41-AW?
Rene 41-AW has a typical yield strength of 930 MPa (135 ksi) and a tensile strength of 1,250 MPa (181 ksi) — stronger than 94% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is Rene 41-AW easy to machine?
Not especially — machinability is rated not recommended (10/100, worse than 93% of nickel alloy grades). Machine in the solution-annealed state where possible: rigid setups, positive-rake carbide or ceramic inserts, ~10–20 m/min with carbide, heavy constant feed and flood coolant to avoid work-hardened glazing.
Can Rene 41-AW be welded?
With care — weldability is rated fair (35/100). GTAW/EBW with matching AMS 5800 filler on solution-annealed material only; low heat input, no preheat, and re-solution before ageing to avoid strain-age (post-weld heat treatment) cracking.
What surface finishes work on Rene 41-AW?
Not anodizable; grit-blast plus pickling or electropolish for scale removal, and use aluminide/diffusion or thermal-barrier coatings for very high-temperature oxidation service.
Can Rene 41-AW be formed, bent or molded?
Cold form only in the solution-annealed condition with high-tonnage presses and generous radii; hot working is done at 1010–1120 °C with tight temperature control, and ageing must follow all forming.
What is the maximum service temperature of Rene 41-AW?
Rene 41-AW is rated for continuous use to about 815°C (1,499 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Rene 41-STA and Rene 41 SA-2150?
STA is the default condition — standard service condition giving peak room- to 760 °C strength for casings, fasteners and springs. SA-2150: coarse-grain high-temperature solution treatment used when creep-rupture life above 870 °C matters more than room-temperature strength. Yield strength is 1,060 MPa in STA versus 590 MPa in SA-2150.
Sources
- AMS 5545 — Nickel Alloy Sheet, Strip and Plate (Rene 41), Solution Heat Treated — SAE International (2017)
- AMS 5712 / AMS 5713 — Rene 41 Bars, Forgings and Rings — SAE International (2016)
- AMS 5800 — Rene 41 Welding Wire — SAE International (2015)
- ASM Handbook Vol. 1: Properties and Selection — Heat-Resistant 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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.