Jul 4 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Fabrication and Heat Treatment
Applications
Introduction
Super alloys are high performance alloys that are known for their excellent mechanical strength and resistance to creep at elevated temperatures, good surface stability, and good corrosion and oxidation resistance.
Super alloy INCONEL N06230 is a carbide strengthened nickel-chromium-tungsten-molybdenum alloy. This alloy is known for its superior combination of stability, strength and resistance to corrosion at elevated temperatures. It also provides good resistance to oxidation at temperatures greater than 980°C (1800°F) and good resistance to carburization and nitridation.
The following section explains in detail about super alloy INCONEL N06230.
Chemical Composition
The chemical composition of INCONEL N06230 is outlined in the following table.
|
Element |
Content (%) |
|
Nickel. Ni |
47.49 - 65.19 |
|
Chromium, Cr |
20 – 24 |
|
Tungsten, W |
13 – 15 |
|
Cobalt, Co |
≤ 5 |
|
Iron, Fe |
≤ 3 |
|
Molybdenum, Mo |
1-3 |
|
Manganese, Mn |
0.30 - 1 |
|
Silicon, Si |
0.25 - 0.75 |
|
Aluminum, Al |
0.20 - 0.50 |
|
Carbon, C |
0.050 - 0.15 |
|
Phosphorous, P |
≤ 0.030 |
|
Sulfur, S |
≤ 0.015 |
|
Boron, B |
≤ 0.015 |
|
Lanthanum, La |
0.0050 - 0.050 |
Physical Properties
The physical properties of INCONEL N06230 are tabulated below.
|
Properties |
Metric |
Imperial |
|
Density |
8.91 g/cm3 |
0.322 lb/in3 |
|
Melting point |
1360 - 1410°C |
2480 - 2570°F |
Mechanical Properties
The following table shows mechanical properties of INCONEL N06230.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
806-841 |
117-122 ksi |
|
Yield strength |
379-427 |
55-62 ksi |
|
Poisson’s ratio |
0.31 |
0.31 |
|
Elongation at break |
44-48% |
44-48% |
|
Elastic modulus |
167 GPa |
24200 ksi |
|
Shear modulus |
63 GPa |
9140 ksi |
Thermal Properties
The thermal properties of INCONEL N06230 are tabulated below.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@100°C/212°F) |
3.84 µm/m°C |
2.13 µin/in°F |
Fabrication and Heat Treatment
Hot and cold forming, machining and welding can all be performed using the conventional processes for high-strength nickel alloys. In case of heavy forming and forging the temperature range is 1010-1230°C (1850-2250°F). Light working can be done at 954°C (1750°F). Similarly in the case of performing annealing before forming, it can be done at 1066-1149°C (1950-2100°F) so as to avoid a coarse grain structure for forming.
Applications
INCONEL N06230 is used in equipment and components for the following application areas:
-
Land-based gas turbines
-
Thermal and petrochemical processing
-
Heat treating
-
Ore and metal refining.