Aluminium / Aluminum 2011 alloy (UNS A92011)

Topics Covered

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

Introduction

Aluminium / Aluminum alloys feature strong corrosion resistance. These alloys are considered as good low-temperature alloys as their strength increases when exposed to subzero temperatures and they lose some of the strength when exposed to high temperatures. Aluminium / Aluminum alloys are sensitive to high temperatures ranging between 200 and 250°C (392 and 482°F).

The following datasheet provides an overview of Aluminium / Aluminum 2011 alloy.

Chemical Composition

The chemical composition of Aluminium / Aluminum 2011 alloy is outlined in the following table.

Element Content (%)
Aluminium / Aluminum, Al 93.7
Copper, Cu 5.5
Bismuth, Bi 0.4
Lead, Pb 0.4

Physical Properties

The following table shows the physical properties of the Aluminium / Aluminum 2011 alloy.

Properties Metric Imperial
Density 2.82 g/cm3 0.1018 lb/in3

Mechanical Properties

The mechanical properties of Aluminium / Aluminum 2011 alloy are displayed in the following table.

Properties Metric Imperial
Elastic modulus 70-80 GPa 10152-11603 ksi
Poisson's ratio 0.33 0.33

Thermal Properties

The thermal properties of Aluminium / Aluminum 2011 alloy are given in the following table.

Properties Conditions
T (ºC) Treatment
Thermal expansion 23 (10-6/ºC) 20-100 -
Thermal conductivity 152 (W/mK) 25 T3

Other Designations

Equivalent materials to Aluminium / Aluminum 2011 alloy are:

  • ASTM B210
  • ASTM B211
  • DIN 3.1056
  • QQ A-225/3
  • SAE J454

Fabrication and Heat Treatment

Annealing

Aluminium / Aluminum 2011 alloy is held for 2 to 3 h at 413°C (775°F) and then it is cooled in a controlled manner at a rate of 10°C (50°F) per hour down to 260°C (500°F) and finally cooled in air.

Cold Working

Aluminium / Aluminum 2011 alloy can be cold worked by conventional methods. This alloy has free-machining capability. Optimum strength for this alloy can be achieved by an aging heat treatment after the cold working process.

Welding

Welding is not recommended for Aluminium / Aluminum 2011 alloy.

Forging

Aluminium / Aluminum 2011 alloy can be forged or hot worked between 288 and 482°C (550 and 900°F).

Forming

Conventional methods are used to form, bend and shape Aluminium / Aluminum 2011 alloy. The alloy is age hardened after being cold worked in order to improve its strength properties.

Machinability

Aluminium / Aluminum 2011 alloy is a free-machining alloy. High-speed tool steel tooling and carbide tooling can be used for this alloy. Rake angles should be 32° cutting edge, 10° clearance, 50° for top rake and 15° side r ake. Light cutting can be done dry and heavy cutting can be carried out by using oils.

Heat Treatment

Aluminium / Aluminum 2011 alloy is heat treated at 510°C (950°F) to obtain optimum strength. After being completely heat treated, this alloy is water quenched and cold worked to a desired shape. It is finally heated at 160°C (320°F) for 15 hours and then cooled in air.

Hot Working

Aluminium / Aluminum 2011 alloy is hot worked at 288 to 482°C (550 to 900°F).

Aging

Aluminium / Aluminum 2011 alloy is age hardened at 510°C (950°F) then water quenched. This alloy can also be heated to 160°C (320°F) for 14 hours after being solution heated in order to produce T 8 temper.

Hardening

Aluminium / Aluminum 2011 alloy is age hardened at 510°C (950°F) for 3 hours and then water quenched.

Applications

Aluminium / Aluminum 2011 alloy is used in the manufacture of machine parts, screw machine products, tube fittings, pipe stems, hose and atomizer parts and cigarette holders.

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