Cobalt Alloy R41 / Rene 41

Technical Data Sheet

Chemical Composition Limits
Weight % C Si Ni Co Al Fe Mn Cr Mo Ti B
Rene 41
0.06 - 0.12 0.20 max Bal 10-12 1.4-1.6 5.0 max 0.10 max 18-20 9.0-10.50 3-3.30 0.003-0.010

Alloy R41 (Rene 41) is an age hardening nickel base super alloy with has exceptional strength from room temperature through to between 650°C - 980°C (1200 - 1800ºF). R 41 is designed for use in severely stressed high temperature applications. R41 (Rene 41) is typically used in hot components for jet engines, rocket engines, turbine blades, turbine wheels, torque rings, bolting, springs and much more.

Typical Mechanical Properties

Material Tensile Strength ksi Yield Strength ksi Elongation in 4D Reduction of Area Hardness
Rene 41 (R41)
Solution Treated Bar
        363 HB max
Rene 41 (R41)
Solution Treated Aged Bar
170 130 8 10 311 HB min
Rene 41 (R41)
Solution Treated Sheet
170 max 100 max 30 max   30HRC max
Rene 41 (R41)
Solution Treated Aged Sheet
170 min 130 min 10 min   35 HRC min

Alloy R41 (Rene 41) is available in Sheet, Strip, Plate, Wire, Rod, Bar (round bar, flat bar), Forging Stock and Welding Wire. For all stock availability contact Sales.

UNS N07041
Werkstoff Nr. 2.4973
AISI 683
SAE AMS 5712 Bar
SAE AMS 5545 Sheet, Strip and Plate
GE B50T59 Sheet, Plate, Strip, Bars and Forgings
GE B50TF76C Sheet, Plate, Strip
GE B50TF109C Sheet, Strip, Plate, Solution Treated
SAE AMS 5800 Welding Wire
MSRR 9500/241 Welding Wire
Tradenames - Rene 41, Pyromet Alloy 41

At Aircraft Materials all stock items can be shipped out within 24 hours, usually within the same day. Even cutting orders for bar or sheet can be processed and dispatched the same day, and for time-critical situations such as AOGs, we have a dedicated AOG service desk ready to help (

Thanks to our global logistics network we can source from anywhere in the world in just a few days. We use a range of transport partners to enable us to ship overnight within the U.K. and Europe and provide fast shipping solutions to the rest of the world. If your requirement is urgent we can offer a priority shipping service, but also if time is not so critical we can offer more cost-effective options to ensure you get the best value for money. To find out more about our services click here.

Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

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