René 41, alloy 41, 2.4973, UNS N07041 - nickel alloy

René 41, alloy 41, 2.4973, UNS N07041 - nickel alloy according to AMS 5399, 5545, 5800, 7469D

René 41, Alloy 41, 2.4973, UNS N07041 – description

René 41 (UNS N07041) is a Ni-Cr-Co-Mo, age-hardening, creep-resistant superalloy with aluminum and titanium alloying additions.

Applications

Jet engine and high speed airframe components, such as fasteners, wheels, afterburner parts, turbine casings.

Physical and Tensile Properties

Room temperature physical properties:

• Density: 8.25 g/cm³
• Melting Temperature: 1232-1391 °C
• Specific Heat Capacity: 435 J

High-temperature Coefficient of thermal expansion, from 20°C to:

• 100°C: 12.1 μm/m⋅K
• 315°C: 12.6 μm/m⋅K
• 540°C: 13.5 μm/m⋅K
• 650°C: 14.0 μm/m⋅K
• 760°C: 14.8 μm/m⋅K
• 870°C: 15.8 μm/m⋅K
• 980°C: 16.7 μm/m⋅K
• 1095°C: 17.8 μm/m⋅K

Thermal Conductivity:

• 150°C: 11.5 W/m · K
• 315°C: 14.7 W/m · K
• 540°C: 18.9 W/m · K
• 650°C: 21.1 W/m · K
• 760°C: 23.2 W/m · K
• 870°C: 25.2 W/m · K

Electrical Resistivity of strips:

• Hot rolled: 1,31 μΩ·m
• Hot rolled + solutioned (1066°C, 4h, AC): 1,25 μΩ·m
• Hot rolled + solutioned (1066°C, 4h, AC) + aged (760°C, 16h, AC): 1,27 μΩ·m
• Hot rolled + solutioned (1177°C, 30 min, AC): 1,33 μΩ·m
• Hot rolled + solutioned (1177°C, 30 min, AC) + aged (900°C, 4h, AC): 1,34 μΩ·m

Young's Modulus:

• 20°C: 218 GPa
• 100°C: 214 GPa
• 315°C: 202 GPa
• 540°C: 188 GPa
• 650°C: 179 GPa
• 760°C: 171 GPa
• 870°C: 160 GPa

High-Temperature Mechanical Properties of René 41 in solutioned (1066°C, 4h, AC) and aged (760°C; 16h, AC) condition:

• 20°C:
  • Yield strength: 1062 MPa
  • Tensile strength: 1420 MPa
  • Elongation: 14 %
• 540°C:
  • Yield strength: 1014 MPa
  • Tensile strength: 1400 MPa
  • Elongation: 14 %
• 595°C:
  • Yield strength: 1007 MPa
  • Tensile strength: 1379 MPa
  • Elongation: 14 %
• 650°C:
  • Yield strength: 1000 MPa
  • Tensile strength: 1338 MPa
  • Elongation: 14 %
• 760°C:
  • Yield strength: 938 MPa
  • Tensile strength: 1103 MPa
  • Elongation: 11 %
• 815°C:
  • Yield strength: 814 MPa
  • Tensile strength: 869 MPa
  • Elongation: 14 %
• 870°C:
  • Yield strength: 552 MPa
  • Tensile strength: 621 MPa
  • Elongation: 19 %
• 925°C:
  • Yield strength: 345 MPa
  • Tensile strength: 400 MPa
  • Elongation: 26 %

Stress-Rupture Properties - stress causing rupture in:

• 650°C, 1000h: 689 MPa
• 705°C, 100h: 662 MPa
• 705°C, 1000h: 510 MPa
• 760°C, 10h: 621 MPa
• 760°C, 200h: 441 MPa
• 760°C, 1000h: 276 MPa
• 815°C, 10h: 414 MPa
• 815°C, 200h: 262 MPa
• 815°C, 1000h: 165 MPa
• 870°C, 10h: 255 MPa
• 870°C, 200h: 159 MPa
• 870°C, 1000h: 97 MPa
• 925°C, 10h: 189 MPa
• 925°C, 200h: 83 MPa

Creep-Rupture Properties - stress to produce 0,2% plastic creep in:

• 650°C, 100h: 634 MPa
• 650°C, 1000h: 524 MPa
• 730°C, 100h: 386 MPa
• 730°C, 1000h: 234 MPa
• 815°C, 100h: 128 MPa

Corrosion Resistance

High general corrosion resistance. Very high oxidation resistance. Very high resistance to jet combustion gases up to 980°C.

Hot corrosion resistance test results (metal loss):

• 870°C, 500h: 0,3 mm
• 980°C, 1000h: 0,8 mm

Weldability

Good enough weldability with inert gas-arc methods, but due to aluminum + titanium content it requires an additional heat treatment. Long pre-welding solution treatment is required (1066-1080°C, 4h, water quench). Post-weld additional aging treatment (900°C, 1h, air cool) is recommended to minimize the risk of cracking. After that the part should undergo the normal aging sequence described below.

Heat Treatment, Working and Machining

Final properties of alloy 41 can be influenced by the solution-treatment. Higher temperature is beneficial for creep-resistance, lower for tensile ductility. Recommended work and heat treatment parameters:

• Hot working: 1150-1010°C
• Solution-treatment: 1040-1050°C; 4h; AC (for max tensile ductility)
• Solution-treatment: 1080-1090°C; 1h; AC (for max creep-resistance)
• Age-hardening: 760°C; 16h; AC

Cast René 41 heat treatment:

• Solution-treatment: 1065°C; 3h; AC
• Solution-treatment: 1120°C; 30 min; AC
• Age-hardening: 900°C; 4h; AC

Cold working is difficult because alloy 41 work hardens rapidly; frequent anneals are required.

We deliver this steel alloy as:

• Bars according to AMS 5712, 5713
• Weld rods according to AMS 5800
• Sheets and strips according to AMS 5545

Replacements, equivalents and other designations:

Rene 41, René 41, UNS N07041, GH141, GH4141, 2.4973, NiCr19CoMo, Haynes® R-41, CarTech 41, AISI 683, AMS 5399 (N07041), AMS 5545 (N07041), AMS 5800 (N07041)< AMS 7469D (N07041), AMS AS7469 (N07041), Allvac Rene 41, J467 Rene 41, Pyromet® 41, Pyroment® alloy 41, Udimet® AF-2-1DA, Udimet® alloy R41, Udimet® 41, Unitemp® 41, Unitemp® AF 2-1 DA