Nimonic 75* Specification
*Trade name of Special Metals Group of Companies

  • W.NR 2.4951
  • W.NR 2.4630
  • UNS N06075
  • AWS 032

Applicable Standards:

  • BS HR 5
  • BS HR 504

Nimonic 75 is a Nickel-Chromium alloy with good corrosion and heat resistance.

Good Mechanical Properties at Elevated Temperatures Yes
Corrosion Resistant at Ambient Temperatures No
Corrosion Resistant & Good Mechanical Properties at Elevated Temperatures No
Oxidation Resistant Yes
Precipitation Hardenable No

Applications include:

  • Aerospace fasteners

Approximate Chemical Composition
Ni 80% min
Cr 19.5%
Properties
DENSITY 8.37 g/cm3 0.302 lb/in3
MELTING POINT 1380oC 2520oF
COEFFICIENT OF EXPANSION 11.0 µm/m °C
(20 - 100°C)
6.1 x 10-6 in/in °F
(70 - 212°F)
MODULUS OF RIGIDITY 75.6 kN/mm2 10965 ksi
MODULUS OF ELASTICITY 206 kN/mm2 29878 ksi
CONDITION OF SUPPLY HEAT TREATMENT (AFTER FORMING)
Annealed/Spring Tempered Stress relieve at 450 - 470°C (840 - 880°F) for 30 - 60 minutes and air cool.
CONDITION APPROX TENSILE STRENGTH APPROX SERVICE TEMPERATURE
Annealed 700 - 800 N/mm2 102 - 116 ksi -200 to +1100°C -330 to +2010°F
      (for lightly stressed applications)
Spring Temper 1200 - 1500 N/mm2 174 - 218 ksi -200 to +1100°C -330 to +2010°F
      (for lightly stressed applications)
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