René 41

René 41

René 41 is an age hardening nickel base superalloy with exceptional strength from room temperature through about 1600°F. The alloy is sensitive to strain age cracking during welding. Sound welds can be made by the resistance and electron beam methods. GTAW using DC straight polarity requires good joint fit-up and cooling by means of copper backup bars or water-cooled fixtures. René 41 should be in the fully solution treated condition prior to welding. After welding the assembly should be solution treated using rapid heating and cooling rates through the 1200-1600°F range, followed by aging.

Mechanical properties vary with the solution and aging treatments. Higher solution temperatures result in better room temperature ductility and elevated temperature creep-rupture strength. Lower solution temperatures give higher tensile strengths. Two commonly used heat treatments are:

1. Solution treat: 2150°F 4 hours, air cool. Age: Reheat 1650 °F 4 hours, air cool.
2. Solution treat: 1975 °F 4 hours, air cool. Age: Reheat 1400°F 16 hours, air cool.

Chemistry

 CrNiMoCoAlTiBCFeMnSiSCu
MIN 18.00 -- 9.00 10.00 1.40 3.00 0.003 -- -- -- -- -- --
MAX 20.00 Balance 10.50 12.00 1.80 3.30 0.01 0.12 5.00 0.10 0.50 0.015 0.50

Specifications

AMS 5545AMS 5712AMS 5713AMS 5800
EN 2.4973
GE B50T59GE B50TF109GE B50TF76
UNS N07041
Werkstoff 2.4973

Inventory

René 41 Sheet, René 41 Welding Products

Common Trade Names

René 41 Alloy,

Features

  • Exceptionally high strength
  • Oxidation resistant through 1800°F

Applications

  • Jet engine hot components
  • Missile components
  • Bolting
  • Springs

Physical Properties

Density: 0.298 lb/in3
Melting Range: 2385 - 2450°F

Temperature, °F 800 1000 1200 1400 1600 1800
Coefficient* of Thermal Expansion,
in/in°F x 10-6
7.4 7.6 8.0 8.4 8.6 9.3
Thermal Conductivity
Btu • ft/ft2 • hr • °F
9.7 10.8 12.0 13.2 14.4 -
Modulus of Elasticity Dynamic,
psi x 106
29 28 26 125 24 22

* 70°F to indicated temperature.

Mechanical Properties

Representative Tensile Properties Heat Treated, Sheet

Temperature, °F 70 1200 1400 1600
Ultimate Tensile Strength, ksi 183 162 152 103
0.2% Yield Strength, ksi 119 111 109 84
Elongation, % 21 14 14 11
Hardness, Rockwell C 33-40 - - -

Typical Rupture Strength, Heat Treated, Sheet - Stress to Rupture at Indicated Time

Temperature, °F 1200 1400 1600
100 Hours, ksi 107 63 23
1,000 Hours, ksi 90 43 13