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Super Alloy Rene 41(tm)

Related Metals:

HAYNES(r) R-41 alloy
Pyromet Alloy 41(tm)
Udimet R-41(tm)
HAYNES(r) R-41 alloy(tm)


AISI 683
AMS 5545
AMS 5712
AMS 5713
AMS 5800
DIN 2.4973
GE B50T44
GE B50T59
GE B50T94
GE B50TF109
GE B50TF11
GE B50TF110
GE B50TF210
GE B50TF59
GE B50TF75
GE B50TF76
UNS N07041
Chemistry Data
Aluminum   1.4 - 1.8
Boron   0.003 - 0.01

0.04 - 0.12


17.5 - 20


10 - 12


5 max


0.1 max


9 - 10.5

Nickel   Balance
Silicon   0.5 max
Sulphur   0.015 max

3 - 3.3

General Information

Principal Design Features

A wrought nickel base high temperature, high strength alloy. Good oxidation resistance at high temperatures in the range of 1200 to 1800 F. The alloy is strengthened by solution heat treating and double aging at lower temperatures.


Gas turbine, aircraft and land/marine, applications. Also can be used in high strength, high temperature environments where oxidation resistance is of prime importance.


Conventional machining techniques used for iron based alloys may be used. This alloy does work-harden during machining and has higher strength and "gumminess" not typical of steels. Heavy duty machining equipment and tooling should be used to minimize c


This alloy has good ductility and may be readily formed by all conventional methods. Because the alloy is stronger than regular steel it requires more powerful equipment to accomplish forming. Heavy-duty lubricants should be used during cold forming. I

Corrosion Resistance

Rene 41 is an oxidation resistant alloy not intended for corrosion applications.


The commonly used welding methods work well with this alloy. Matching alloy filler metal should be used. If matching alloy is not available then the nearest alloy richer in the essential chemistry (Ni, Co, Cr, Mo) should be used. All weld beads should

Heat Treatment

Heat treating consists of a solution anneal at 1975 F for 4 hours then air cooling and a subsequent aging heat treatment at 1400 F for 16 hours followed by air cooling.


Forging can be accomplished with the alloy in the solution annealed condition. It is ductile and behaves much the same as the 300 series stainless steels. However it is stronger than stainless steel even at forging temperatures and thus requires more fo

Hot Working

See comments under "Forging".

Cold Working

Cold forming may be done using standard tooling although plain carbon tool steels are not recommended for forming as they tend to produce galling. Soft die materials (bronze, zinc alloys, etc.) minimize galling and produce good finishes, but die life is


Solution anneal at 1950 - 1975 F for 4 hours at temperature followed by an air cool.


Aging is done, after solution heat treating, at 1400 F for 16 hours followed by air cooling. This develops maximum strength levels at the higher end application temperatures. Aging may also be done at higher temperatures such as 1600 F with an increase


The alloy hardens by cold working, but should then be solution annealed. Aging does harden and strengthen the alloy.

Other Mechanical Props

Form-Condition Temp. Yield Str. Tensile Str. Elong. in 2% Deg.F 0.2% offset Bar 1950 F 70 154 ksi 206 ksi 14 % soln. anneal 1000 147


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