René 41 (UNS N07041): Properties, Standards & Supply
Basic Description
Sagiant Piping Industries supports enquiries for René 41 / R-41 (UNS N07041, Werkstoff 2.4973) as bar, forgings, rings, sheet/plate, wire, fasteners and investment castings for aerospace and gas-turbine applications. René 41 is an age-hardenable nickel-base superalloy strengthened by gamma-prime Ni₃(Al,Ti) precipitation. It retains high strength through roughly the ~980°C region, but that is not a universal service limit — usable temperature depends on stress, service life, duty cycle, atmosphere and section, and an oxidation or strength figure is not automatically a rotating-part fatigue or rupture allowable. Material is supplied by form and condition (solution treated, or solution + precipitation aged) against the applicable AMS references, with acceptance limits and editions confirmed per order and EN 10204 3.1 or 3.2 documentation. René 41 is a trademarked alloy; Sagiant is an independent supplier and stockist, not the alloy producer, and the offer is mainly solid and flat products rather than seamless pipe.
René 41 (N07041): chemistry, properties, standards and RFQ data
René 41 composition, condition-specific mechanical and physical reference data, AMS standards by product form and condition, heat-treatment cycles and high-temperature service guidance. Producer reference values are shown separately from specification acceptance limits confirmed on the certificate.
Technical Specification
| Parameter | Specification |
|---|---|
| Material | René 41 / R-41 (UNS N07041, Werkstoff 2.4973); age-hardenable nickel-base superalloy |
| Strengthening | Gamma-prime Ni₃(Al,Ti) precipitation |
| Product forms | Bar, forging, ring, sheet/plate/strip, wire, fasteners and investment castings — by actual route |
| Supply conditions | Solution treated; or solution and precipitation (age) treated per specification |
| Basis | Producer reference data; specification acceptance limits, form, condition and edition confirmed per order |
René 41 (also written “Rene 41” / R-41) is a trademarked alloy; Sagiant is an independent supplier and stockist, not the alloy producer. The technical range is mainly solid and flat products (bar, forging, ring, sheet/plate) rather than seamless pipe.
Chemical Composition (wt %)
| Element | Mass % |
|---|---|
| Nickel, Ni | Balance |
| Chromium, Cr | ~19 |
| Cobalt, Co | ~11 |
| Molybdenum, Mo | ~10 |
| Titanium, Ti | ~3.1 |
| Aluminium, Al | ~1.5 |
| Iron, Fe | ≤5 |
| Silicon, Si | ≤0.5 |
| Manganese, Mn | ≤0.1 |
| Carbon, C | ~0.09 |
| Boron, B | ~0.006 |
| Zirconium, Zr | ≤0.07 |
Titanium and aluminium are shown separately. Phosphorus, sulfur, copper and other residual limits come from the selected specification and are confirmed per order; the nominal table alone is not complete specification chemistry, a dash is not zero, and heat analysis differs from check analysis. Limits from wrought, casting and wire routes are not combined.
Identity, specifications and product routes
| Record | Treatment |
|---|---|
| Wrought René 41 / R-41 | Main base-alloy record (N07041); actual producer & product specification identified |
| Solution-treated wrought | Separate delivery/property condition |
| Solution + precipitation-treated wrought | Separate thermal cycle and mechanical requirements |
| Investment castings | Separate route composition, properties, defects/inspection & specification (AMS 5399) |
| Welding wire | Separate consumable specification and weld-metal data (AMS 5800) |
| Powder / additive | Added only with verified route-specific qualification |
| 2.4973 cross-reference | Requires an actual standard and certified condition; not itself a purchase specification |
| Comparison alloys | Haynes 282, Waspaloy and others — alternatives requiring engineering assessment, not equivalents |
“René 41”, “Rene 41” and “R-41” are name variants of one grade, not separate grades; commercial products are not interchangeable merely because names match.
Mechanical Properties
| Property (typical, aged) | Value |
|---|---|
| Tensile strength | ~1420 MPa |
| 0.2% yield strength | ~1060 MPa |
| Elongation | ~14% |
| Hardness | Condition-dependent (a ~42 HRC sheet result is reported for one aging cycle); use the applicable standard limit, not a single 40 HRC maximum |
Solution-treated properties differ from fully aged, and sheet, plate, bar/forgings and castings are separate datasets, each with its own source, form and condition. Elevated-temperature tensile, creep (temperature/stress/time/strain), stress-rupture, fatigue (LCF/HCF) and thermal-stability data are supplied with the applicable qualified dataset, otherwise identified as unavailable; code/OEM design allowables are distinguished from producer typicals.
Physical Properties
| Property | Value |
|---|---|
| Density | ~8.25 g/cm³ |
| Modulus of elasticity (27°C) | ~218 GPa |
| Shear modulus (27°C) | ~83 GPa |
| Poisson’s ratio | ~0.31 |
| Melting range | Per producer datasheet |
| Thermal & electrical | Heat capacity, thermal conductivity/diffusivity, electrical resistivity and mean expansion per producer temperature table |
| Magnetic response | Qualitative unless a sourced permeability with field/condition is available |
Temperature-dependent properties use each source’s own series and units rather than a single constant; a melting interval is not a maximum operating temperature.
Standards by Product Form & Condition
| Form / role | Reference |
|---|---|
| Investment castings | AMS 5399 (not a forged-ring or forging specification) |
| Sheet, strip & plate | AMS 5545 (solution treated, precipitation-heat-treatable) |
| Bars, forgings & rings (solution treated, precipitation hardenable) | AMS 5712 |
| Bars, forgings & rings (solution + precipitation heat treated) | AMS 5713 — not interchangeable with 5712 |
| Welding wire | AMS 5800 (welding consumable — not a sheet/plate specification) |
| Fasteners | Exact material and finished-fastener/drawing, thread & inspection requirements (not “AMS bolting specs”) |
Generic ASTM B-series or ASME SB references are not added merely because René 41 is nickel-based; the exact alloy/form is matched to scope and code acceptance. A dimensional standard does not by itself certify the material.
Available Forms, Sizes & Dimensions
| Form | Basis |
|---|---|
| Bars | Diameter, length, tolerances, finish & heat-treatment condition |
| Sheet / strip / plate | Thickness, width, length, finish & tolerances (sheet and plate thickness ranges stated per form to avoid a gap between them) |
| Forgings / rings | Route, OD/ID/height, machining allowance, grain flow & grain-size/inspection |
| Castings | Separate geometry/inspection/condition where supplied |
| Wire | Welding wire, engineering wire and heading stock distinguished |
| Fasteners | Part/drawing standard, thread system/class, condition, manufacturing sequence & acceptance tests |
No invented pipe schedules: any tubular offer requires a route and material specification first, and there is no routine tubular specification listed for R-41. Unsupported forms are marked “not offered” or “subject to technical confirmation”; stocked, mill-order and custom capability are kept distinct.
Temperature, Service & Corrosion
| Aspect | Consideration |
|---|---|
| High-temperature strength | René 41 retains high strength through roughly the ~980°C region, but this is incomplete as a universal limit — add stress, service life, duty cycle, atmosphere, section & surface condition |
| Application qualification | Each application linked to its form and qualification (casting vs forging matters for blades and wheels) |
| Corrosion modes | Oxidation, hot corrosion/sulfidation, molten deposits, carburisation/nitridation and aqueous attack assessed separately, with test conditions and metal loss/penetration — not blanket immunity |
Strength positioning is stated against temperature, condition and metric rather than as an unqualified “highest-strength” ranking; resistance is not immunity.
Heat Treatment
| Step | Guidance |
|---|---|
| Solution treatment | Per specification/form; higher and lower solution routes give different property tradeoffs |
| Aging | Commercial aging through ~760–982°C (broader than a 760–900°C envelope), by property goal |
| Cooling / cycle | Time and cooling per the governing specification; not a single fixed recipe |
Hot-forging temperature guidance is separate from the room-temperature delivery condition; the exact solution/aging cycle is governed by the selected specification.
Welding & Fabrication
| Topic | Guidance |
|---|---|
| Strain-age cracking | Controlled by initial condition, filler choice, restraint, heating rate through sensitive temperature regions and heat-treatment sequence |
| Filler & process | Filler identity (matching welding consumable vs non-welding wire), process, cleaning, shielding/root protection & interpass/heat-input control |
| Post-weld | PWHT and inspection; weld-metal properties distinguished from restored base-metal design properties |
| Forming & machining | Hot/cold forming, work hardening, intermediate annealing, machining/tooling & scale-removal guidance |
A qualified procedure — not website temperature ranges — governs shop practice.
Testing & Documentation
| Item | Scope |
|---|---|
| Mechanical | Room-temperature and elevated tensile, stress-rupture and grain size per contracted method & acceptance criteria |
| NDT | As specified for the form & class (castings inspected to their own criteria) |
| PMI | Confirms alloy identity within the instrument/method capability; does not establish complete chemistry |
| Certification | EN 10204 3.1 (manufacturer) vs 3.2 (independent/third-party); document type does not inherently require every test |
Contracted tests, methods and acceptance criteria are agreed at ordering with heat/lot traceability rather than promised unconditionally.
Product Range
The rene 41 range can be supplied with related pipes, tubes, butt weld fittings, forged fittings, flanges, fasteners and custom fabricated items where required by the BOQ.
Applications
For dimensional references, see the Pipe Schedule & Fittings Guide. For related supply, review Pipes & Tubes, Butt Weld Fittings, Forged Fittings and Flanges.
Types of Products
| Type | Description |
|---|---|
| Pipes & Tubes | Seamless, welded and large-diameter supply |
| Fittings | Butt weld, forged and fabricated fittings |
| Flanges | Forged flanges and special machined items |
| Plates / Bars / Round Bars | Subject to grade and project availability |
Available Forms
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Frequently Asked Questions
Is René 41 a family of grades, and is “Rene 41” different from “R-41”?
René 41 is principally one alloy identity, UNS N07041 (Werkstoff 2.4973). “René 41”, “Rene 41” and “R-41” are name variants of the same grade, not separate grades. What varies is the product route (wrought, investment casting, welding wire) and the delivery condition (solution treated, or solution + precipitation aged). René 41 is a trademarked alloy and Sagiant is an independent supplier and stockist, not the producer.
What is the chemical composition of René 41?
Producer nominal composition is approximately Cr 19, Co 11, Mo 10, Ti 3.1, Al 1.5, C 0.09, B 0.006, with Fe ≤5, Si ≤0.5, Mn ≤0.1 and Zr ≤0.07, and nickel as balance. That is a nominal reference, not complete specification chemistry — phosphorus, sulfur, copper and other residual limits come from the selected wrought, casting or wire specification, and the mill certificate governs. A dash is not zero.
What hardness does aged René 41 reach?
There is no single 40 HRC maximum. Hardness depends on the heat-treatment cycle — a sheet result of about 42 HRC is reported for one aging condition. The applicable value is the limit or typical range stated for the specific condition in the selected specification, not a universal maximum.
Which specification applies to each product form?
By form and route: AMS 5399 for investment castings, AMS 5545 for sheet/strip/plate, AMS 5712 for bars/forgings/rings (solution treated, precipitation hardenable), AMS 5713 for bars/forgings/rings (solution + precipitation heat treated), and AMS 5800 for welding wire. AMS 5399 is not a forging specification and AMS 5800 is not a sheet/plate specification. The form, condition and adopted edition are confirmed per order.
Does Sagiant supply René 41 pipe?
The verified René 41 range is mainly solid and flat products — bar, forging, ring, sheet/plate — plus wire, fasteners and castings. There is no routine tubular specification listed for R-41, so we do not advertise a standard pipe schedule range. A custom tube can be discussed with a defined route and material specification, and unsupported tubular forms are marked “subject to technical confirmation” rather than filled with guessed schedules.
Is René 41 weldable?
René 41 is susceptible to strain-age cracking, so welding feasibility is separate from restored design properties. Successful welding depends on the initial condition, filler choice (matching welding consumable vs non-welding wire), restraint, cleaning, shielding, heat-input/interpass control, the heating rate through sensitive temperature regions and the post-weld heat-treatment sequence — all in a qualified procedure.
What information is needed for a quotation?
Provide the product form and route, dimensions and tolerances, quantity, delivery condition (solution / aged), the exact specification and edition, service temperature, stress and duty, required testing (RT/elevated tensile, stress-rupture, grain size, NDT), traceability and certificate type (EN 10204 3.1 or 3.2), finish and delivery location. Availability and the accepted specification route are confirmed with the quotation.
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