Super Alloy INCONEL C-276 (UNS N10276)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Fabrication and Heat treatment
     Welding
     Hot Working
     Annealing
Applications

Introduction

Inconel is a group of austenitic nickel-chromium-based super alloys produced by Special Metals Corporation. Super alloys are referred to as high performance alloys that function well in environments with elevated temperatures.

Super alloy INCONEL C-276 has high molybdenum content which provides the material with localized corrosion resistance like pitting. This alloy is generally known for corrosion resistance in a wide range of aggressive media. The low carbon content in this alloy helps to reduce carbide precipitation while performing welding.

The following section explains in detail about super alloy INCONEL C-276.

Chemical Composition

The chemical composition of INCONEL C-276 is outlined in the following table.

Element Content (%)
Molybdenum, Mo 15-17
Chromium, Cr 14.5-16.5
Cobalt, Co 2.5 max
Manganese, Mn 1
Vanadium, V 0.35 max
Silicon, Si 0.08 max
Phosphorus, P 0.04 max
Sulfur, S 0.03 max
Carbon, C 0.01 max
Nickel. Ni Remainder

Physical Properties

The physical properties of INCONEL C-276 are tabulated below.

Properties Metric Imperial
Density 8.89 g/cm3 0.321 lb/in3
Melting point 1325 °C 2417 °F

Mechanical Properties

The following table shows mechanical properties of INCONEL C-276.

Properties Metric Imperial
Tensile strength 740.5 MPa 107400 psi
Yield strength 347 MPa 50300 psi
Elastic modulus 205 GPa 29700 ksi
Elongation at break 67% 67%

Thermal Properties

The thermal properties of INCONEL C-276 are tabulated below.

Properties Metric Imperial
Thermal conductivity (@23°C/73.4°F) 9.80 W/m-K 68.0 BTU in/hr.ft².°F

Fabrication and Heat treatment

Welding

Weldability of INCONEL alloy C-276 is rated as good. This material can be used as-welded for most applications.

Hot Working

Hot working of this alloy can be performed 870 and 1230°C (1600 and 2250°F). in case of performing heavy working, it has to be above 1090°C (2000°F).

Annealing

INCONEL alloy C-276 can be annealed at 1150-1175°C (2100-2150°F) and rapidly cooled by water quenching.

Applications

INCONEL C-276 is chiefly used in the following areas:

  • Chemical processing
  • Pollution control
  • Pulp and paper production
  • Industrial and municipal waste treatment
  • Recovery of sour natural gas.

Products made using INCONEL C-276 are as follows:

  • Air pollution control components such as ducts, stack-gas re-heaters, dampers, stack liners, scrubbers, fans and fan housings
  • Components required in chemical processing such as reaction vessels, heat exchangers, evaporators, and transfer piping.

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