Aluminum 2090 Alloy (UNS A92090)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Applications

Introduction

Commercially pure aluminium / aluminum is a silverish white, lustrous metal. The outstanding characteristic of this metal its light weight.

Although aluminium / aluminum alloys are strong, they can be easily worked, as it is very malleable and ductile. Aluminium / aluminum 2090 alloy is a heat treatable wrought alloy that can be easily welded.

The following datasheet will provide more details about aluminium / aluminum 2090 alloy.

Chemical Composition

The following table shows the chemical composition of aluminium / aluminum 2090-T83 alloy.

Element Content (%)
Aluminum, Al 93.2 - 95.6
Copper, Cu 2.4 - 3
Lithium, Li 1.9 - 2.6
Magnesium, Mg ≤ 0.25
Titanium, Ti ≤ 0.15
Iron, Fe ≤ 0.12
Zinc, Zn ≤ 0.10
Silicon, Si ≤ 0.10
Zirconium, Zr 0.080 - 0.15
Manganese, Mn ≤ 0.050
Chromium, Cr ≤ 0.050
Other (each) ≤ 0.050
Other (total) ≤ 0.15

Physical Properties

The physical properties of aluminium / aluminum 2090-T83 alloy are outlined in the following table.

Properties Metric Imperial
Density 2.59 g/cm³ 0.0936 lb/in³
Melting point 560 - 650°C 1040 - 1200°F

Mechanical Properties

The mechanical properties of aluminium / aluminum 2090-T83 alloy are tabulated below.

Properties Metric Imperial
Tensile strength (@diameter 12.7 mm/0.500 in) 550 MPa 79800 psi
Yield strength (@diameter 12.7 mm/0.500 in) 520 MPa 75400 psi
Elongation at break (@diameter 12.7 mm/0.500 in) 6% 6%
Poisson’s ratio 0.34 0.34
Elastic modulus 76 GPa 11000 ksi
Shear strength 320 MPa 46400 psi
Hardness, Brinell (@load 500 kg; thickness 10.0 mm) 150 150
Hardness, Knoop (converted from Brinell hardness value) 191 191
Hardness, Rockwell A (converted from Brinell hardness value) 53.6 53.6
Hardness, Rockwell B (converted from Brinell hardness value) 87 87
Hardness, Vickers (converted from Brinell hardness value) 176 176

Thermal Properties

The thermal properties of aluminium / aluminum 2090-T83 alloy are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F) 23.6 µm/m°C 13.1 µin/in°F
Thermal conductivity 88 W/mK 611 BTU in/hr.ft².°F

Applications

Aluminium / aluminum 2090 alloy is chiefly used in areas where high strength is required such as in aircraft components.

The following are some of the aircraft components made from aluminium / aluminum 2090-T83 alloy:

  • Aircraft floor bulkhead stiffeners
  • Wing leading and trailing edges
  • Fuselage bulkhead webs

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