Jul 4 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Fabrication
Machinability
Welding
Cold working
Annealing
Applications
Introduction
NIMONIC alloys consist of nickel and chromium as the principal components. High-temperature low creep and good corrosion resistance are some of the characteristics of these alloys. Additives like carbon, titanium and aluminium enhances the toughness of the alloy. Some of the NIMONIC alloys available commercially are NIMONIC 75, NIMONIC 80A, 81, 86 and NIMONIC PE11 and 16.
NIMONIC alloy 86 is an alloy of nickel-chromium-molybdenum. It exhibits good weldability, workability, ductility and creep. It also exhibits excellent oxidation resistance at high temperatures. The additive for this alloy is cerium, a rare-earth. This alloy is available in the form of sheet, strip, round, extruded section and wire.
This datasheet will look into the chemical composition, properties and applications of NIMONIC alloy 86.
Chemical Composition
The chemical composition of NIMONIC alloy 86 is given in the following table.
|
Element |
Content (%) |
|
Nickel, Ni |
65 |
|
Chromium, Cr |
25 |
|
Molybdenum, Mo |
10 |
|
Carbon, C |
0.05 |
|
Cerium, Ce |
0.03 |
Physical Properties
The following table discusses the physical properties of NIMONIC alloy 86.
|
Properties |
Metric |
Imperial |
|
Density |
8.54 gm/cm3 |
0.309 lb/in3 |
Mechanical Properties
The mechanical properties of NIMONIC alloy 86 are tabulated below.
|
Properties |
Metric |
Imperial |
|
Tensile strength(annealed) |
825 MPa |
120 ksi |
|
Yield strength(annealed) |
410 MPa |
59 ksi |
|
Elongation at Break |
42% |
42% |
|
Modulus of Elasticity |
210 GPa |
30500 ksi |
Fabrication
Machinability
The conventional machining methods used on iron alloys may be used for this alloy. This alloy work-hardens during machining and exhibits higher strength.
Welding
NIMONIC alloy 86 can be welded using common techniques, using a matching filler metal.
Cold working
Cold working may be done on the alloy for hardening.
Annealing
NIMONIC alloy 86 should be solution annealed.
Applications
The NIMONIC alloy 86 is used in the following applications:
-
Gas turbine engineering
-
Industrial furnaces
-
Combustion chambers.