Nickel Alloy Rene 41 STA-2150
Precip hard
UNS N07041 · EN 2.4973 · also Nicrofer 4722 Co
STA-2150 = 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.
Values for the STA-2150 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 | — |
STA-2150This page 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 | — |
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 STA-2150?
Rene 41 STA-2150 is Rene 41 in the STA-2150 condition — pick when long-term creep and stress-rupture life at 870–980 °C is the design driver and lower RT strength is acceptable. Rene 41 STA-2150 has a yield strength of 900 MPa (131 ksi) and a tensile strength of 1,310 MPa (190 ksi) — stronger than 94% of nickel alloy grades. Elongation at break is 16% and the elastic modulus is 218 GPa (31.6 Msi). Rene 41 STA-2150 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; STA-2150 is available on request or by drawing note.
Advantages
- High strength — 900 MPa (131 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 weld — 25/100, worse than 82% of nickel alloy grades
- Limited ductility — 16%, worse than 79% of nickel alloy grades
- Limited formability — 20/100, worse than 75% of nickel alloy grades
Rene 41 STA-2150 properties
Typical room-temperature values for Rene 41 STA-2150; 11 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 STA-2150 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 STA-2150 has a yield strength of 900 MPa (131 ksi) and a tensile strength of 1,310 MPa (190 ksi) — stronger than 94% of nickel alloy grades. Elongation at break is 16% and the elastic modulus is 218 GPa (31.6 Msi).
Thermal6
Rene 41 STA-2150 is rated for continuous service to 980°C (1,796 °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 STA-2150 conducts electricity at 1.3 % IACS, worse than 89% 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 Rene 41 STA-2150 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 STA-2150's machinability is not recommended (13/100, worse than 82% of nickel alloy grades); weldability poor (25/100); formability poor (20/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Rene 41 STA-2150
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 STA-2150 — frequently asked
What is Rene 41 STA-2150 used for?
Rene 41 STA-2150 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 STA-2150?
Rene 41 STA-2150 has a typical yield strength of 900 MPa (131 ksi) and a tensile strength of 1,310 MPa (190 ksi) — stronger than 94% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is Rene 41 STA-2150 easy to machine?
Not especially — machinability is rated not recommended (13/100, worse than 82% 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 STA-2150 be welded?
Not readily — weldability is rated poor (25/100). 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 STA-2150?
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 STA-2150 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 STA-2150?
Rene 41 STA-2150 is rated for continuous use to about 980°C (1,796 °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.