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 we specialise in the rapid turn-around of orders, with most stock items ready for shipping out the same day to anywhere in the world. For time-critical orders, such as AOGs use our AOG service desk (, the team are dedicated to processing and dispatching orders on the same day, even for cutting orders on bar and sheet products.

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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.