Alloy N86, Nimonic 86® - Nickel Alloy

Alloy N86, Nimonic® alloy 86 - nickel alloy

Alloy N86, Nimonic® 86 – description

Nimonic 86 is a solid solution nickel-chromium-molybdenum alloy with alloying additions of magnesium and cerium. It is exceptionally resistant to cyclic oxidation at 1050°C, ductile, weldable, and creep-resistant.

Applications

Used in aerospace (gas turbine combustion chambers, afrerburner parts) and thermal processing (heat-treatment furnace equipment).

Physical and Tensile Properties

Room temperature physical properties:

• Density: 8.45 g/cm³

High-Temperature Coefficient of Thermal Expansion, from 20°C to:

• 100°C: 12.7 μm/m⋅K
• 200°C: 12.8 μm/m⋅K
• 300°C: 13.1 μm/m⋅K
• 400°C: 13.5 μm/m⋅K
• 500°C: 13.9 μm/m⋅K
• 600°C: 14.1 μm/m⋅K
• 850°C: 15.5 μm/m⋅K
• 1050°C: 16.8 μm/m⋅K

Young's Modulus:

• 20°C: 210 GPa
• 100°C: 206 GPa
• 200°C: 201 GPa
• 300°C: 195 GPa
• 400°C: 189 GPa
• 500°C: 183 GPa
• 600°C: 176 GPa
• 850°C: 155 GPa
• 1050°C: 138 GPa

High-Temperature Tensile Properties of Heat-treated Sheets, according to the manufacturer:

• 20°C:
  • 0.2% Proof Stress: 438 MPa
  • Tensile Strength: 873 MPa
  • Elongation: 45 %
• 750°C:
  • 0.2% Proof Stress: 250 MPa
  • Tensile Strength: 502 MPa
  • Elongation: 74 %
• 850°C:
  • 0.2% Proof Stress: 184 MPa
  • Tensile Strength: 310 %
  • Elongation: 83 %
• 900°C:
  • 0.2% Proof Stress: 125 MPa
  • Tensile Strength: 237 MPa
  • Elongation: 66 %
• 1050°C:
  • 0.2% Proof Stress: 44 MPa
  • Tensile Strength: 98 MPa
  • Elongation: 50 %

High-Temperature Tensile Properties of Heat-treated Bars, according to the manufacturer:

• 300°C:
  • 0.2% Proof Stress: 251 MPa
  • Tensile Strength: 692 MPa
  • Elongation: 49 %
• 500°C:
  • 0.2% Proof Stress: 243 MPa
  • Tensile Strength: 661 MPa
  • Elongation: 54 %
• 700°C:
  • 0.2% Proof Stress: 239 MPa
  • Tensile Strength: 557 %
  • Elongation: 56 %
• 850°C:
  • 0.2% Proof Stress: 173 MPa
  • Tensile Strength: 319 MPa
  • Elongation: 69 %

Corrosion Resistance

Alloy N86 is extremely resistant to cyclic oxidation at 1050°C. Please compare the test results. Test conditions: 15 minutes at 1050°C followed by 5 minutes air cooling.

Heat Treatment, Working and Machining

Heat treatment of sheets: 1150°C for 10 min, air cooling

Heat treatment of sheets: 1150°C for 2-4 h, air cooling

Thermal Stability, Cold Working, and Heat Treatment: Nimonic 86 undergoes precipitation hardening followed by recrystallization when exposed to 500–600°C for long periods of times. Cold working accelerates the process and extends the temperature range to 450–700°C. In contrast, rapid cooling after annealing improves thermal stability by prolonging the time required for hardening to occur.

Weldability

Good weldability. Best weld using TIG process, using matching composition filler wire.

We deliver this steel alloy as:

• Sheets
• Bars
• Forgings
• Plates