Nimonic Alloy 81

Nimonic 81 Bolts and Nuts

Nimonic 81

Buy Nimonic 81 bolts, nuts and other fasteners from Boltport, an Indian manufacturer & supplier of Nimonic 81 bolting materials to ASTM B446, B564, F467, F468, UNS N0681, DIN EN 2.4856, AMS 5666 and BS 3076 specifications with properties adequate for high strength, corrosion resistant and high temperature applications up to 1000º C (1800º F).

Boltport fasteners offer Nimonic 81 bolts and nuts with standard and custom manufacturing to your specification. We covers Nimonic 81 hex bolts, studs, stud bolts, hex nuts, washers, threaded rod and other fastener in metric and inch sizes with coarse, fine and extra fine threads to ASME, UN, BS, ISO and DIN standards.

Enquire About Nimonic 81 Price ? Click Here

Nimonic 81 Bolting Products

Nimonic 81 Bolting Material

Nimonic 81 Specifications

  • ASTM B446 / ASME SB446
  • ASTM B443 / ASME SB443
  • ASTM B564 / ASME SB564
  • ASTM F467 / F467M
  • ASTM F468 / F468M
  • AMS 5666
  • BS 3076
  • Alloy 81
  • UNS N0681
  • DIN / EN / Werkstoff No. 2.4856
Nimonic 81 Material Datasheet

Nimonic 81 Properties

Chemical Composition
Elements Ni Cr Mo Fe Nb + Tc Co Mn Si Al Ti C P S
Min % - 20.0 8.0 - 3.15 8.0 - - - - - - -
Max % Bal 23.0 10.0 5.0 4.15 1.0 0.5 0.5 0.4 0.40 0.10 0.015 0.015
Mechanical Properties
Temperature (°F) Ultimate Tensile (ksi) Yield Strength at 0.2% Offset(ksi) Elongation %
Room Temp. 144.0 84.0 44.0
400 134.0 66.0 45.0
81 132.0 63.0 42.5
800 132.0 61.0 45.0
1000 130.0 61.0 48.0
1200 119.0 60.0 34.0
1400 78.0 59.0 59.0
181 40.0 39.0 117.0
  • Nimonic 81 for Aerospace Industry
  • Nimonic 81 for Chemical Processing Industry
  • Nimonic 81 for Food and Beverage Processing Industry
  • Nimonic 81 for Marine and Offshore Industry
  • Nimonic 81 for Oil and Gas Industry
  • Nimonic 81 for Paper and Pulp Processing Industry
  • Nimonic 81 for Power Generation Industry
  • Nimonic 81 for Research and Development Projects
  • Nimonic 81 for Water Desalination Plants

Nimonic 81 Characteristics

  • Excellent resistance to chloride pitting and crevice corrosion cracking
  • Immune to Chloride ion stress corrosion
  • Maintains high strength at elevated temperatures
  • Resistant to sea water, in both flowing and stagnant condition
  • Heat resistant

Nimonic 81 Applications

  • Marine engineering
  • Furnaces & gas turbines
  • Chemical processing plants
  • Boiler & pressure vessels
  • Nuclear power plants