Nickel 205 Alloy (UNS N02205)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Fabrication and Heat Treatment
     Machinability
     Forming
     Welding
     Heat Treatment
     Forging
     Hot Working
     Cold Working
     Annealing
Other Designations
Applications

Introduction

Nickel 205 alloy is a wrought nickel alloy with properties similar to that of nickel 200 alloy. It exhibits excellent mechanical, electrical and corrosion-resistant properties and good oxidation resistance.

The alloy is ferromagnetic below 360°C (680°F), and contains small additions of aluminum and titanium for a good combination of mechanical and electrical properties.

The following section will discuss in detail about nickel 205 alloy.

Chemical Composition

The chemical composition nickel 205 alloy is outlined in the following table.

Element Content (%)
Nickel, Ni ≥99
Manganese, Mn ≤0.35
Iron, Fe ≤0.20
Silicon, Si ≤0.15
Copper, Cu ≤0.15
Carbon, C ≤0.15
Magnesium, Mg 0.010 - 0.080
Titanium, Ti 0.010 - 0.050
Sulfur, S ≤0.0080

Physical Properties

The following table shows the physical properties of nickel 205 alloy.

Properties Metric Imperial
Density 8.89 g/cm3 0.321 lb/in3
Melting point 1435-1446°C 2615-2635°F

Mechanical Properties

The mechanical properties of nickel 205 alloy are displayed in the following table.

Properties Metric Imperial
Tensile strength (annealed) 345 MPa 50000 psi
Yield strength (annealed) 90 MPa 13100 psi
Elongation at break (annealed) 45% 45%

Thermal Properties

The thermal properties of nickel 205 alloy are given in the following table

Properties Metric Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F) 13.3 µm/m°C 7.39 µin/in°F
Thermal conductivity 75 W/mK 521 BTU.in/hrft².°F

Fabrication and Heat Treatment

Machinability

Nickel 205 alloy can be machined using high-speed tool steels.

Forming

The alloy is very ductile, and hence it can be formed through conventional methods.

Welding

The alloy can be welded using all common welding techniques.

Heat Treatment

Nickel 205 alloy is not heat-treatable, and hence it may be annealed after cold working.

Forging

Forging of nickel 205 alloy can be performed at temperatures from 899°C (1650°F) to 1204°C (2200°F).

Hot Working

Nickel 205 alloy can be hot-worked at temperatures from 677°C (1250°F) to 1204°C (2200°F).

Cold Working

Since the alloy is ductile, it may be readily cold-worked.

Annealing

Nickel 205 alloy can be annealed at 871°C (1600°F).

Other Designations

Other designations that are equivalent to nickel 205 alloy include the following:

  • AMS 5555
  • MIL N-46025
  • ASTM F1
  • ASTM F3
  • ASTM F9

Applications

The following are the list of applications of nickel 205 alloy:

  • Magnetostrictive transducers
  • Mechanical supports
  • Transistor housings
  • Battery cases
  • Lead wires
  • Anodes and grids of electronic valves

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