Super Alloy INCONEL N06230 (UNS N06230)

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.

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