1050 aluminium alloy

1050 aluminium alloy is an aluminium-based alloy in the “commercially pure” wrought family (1000 or 1xxx series). As a wrought alloy, it is not used in castings. Instead, it is usually formed by extrusion or rolling. It is commonly used in the electrical and chemical industries, on account of having high electrical conductivity, corrosion resistance, and workability. 1050 alloy is also sometimes used for the manufacture of heat sinks, since it has a higher thermal conductivity than other alloys. It has low mechanical strength compared to more significantly alloyed metals. It can be strengthened by cold working, but not by heat treatment.

The alloy composition of 1050 aluminium is:

  • Aluminium: 99.5% min
  • Copper: 0.05% max
  • Iron: 0.4% max
  • Magnesium: 0.05% max
  • Manganese: 0.05% max
  • Silicon: 0.25% max
  • Titanium: 0.03% max
  • Vanadium: 0.05% max
  • Zinc: 0.05% max

Aluminium alloy 1050 is a popular grade of aluminium for general sheet metal work where moderate strength is required.
Alloy 1050 is known for its excellent corrosion resistance, high ductility and highly reflective finish.

Applications – Alloy 1050 is typically used for:

  • Chemical process plant equipment
  • Food industry containers
  • Pyrotechnic powder
  • Architectural flashings
  • Lamp reflectors
  • Cable sheathing

Chemical Composition

Spec: BS EN 573-3:2009

Alloy 1050

Chemical Element% Present
Manganese (Mn)0.0 – 0.05
Iron (Fe)0.0 – 0.40
Copper (Cu)0.0 – 0.05
Magnesium (Mg)0.0 – 0.05
Silicon (Si)0.0 – 0.25
Zinc (Zn)0.0 – 0.07
Titanium (Ti)0.0 – 0.05
Other (Each)0.0 – 0.03
Aluminium (Al)Balance

Properties

Physical PropertyValue
Density2.71 g/cm³
Melting Point650 °C
Thermal Expansion24 x10^-6 /K
Modulus of Elasticity71 GPa
Thermal Conductivity222 W/m.K
Electrical Resistivity0.0282 x10^-6 Ω .m

Spec: BS EN 485-2:2008

Sheet – 0.2mm to 6.00mm

Mechanical PropertyValue
Tensile Strength65 -95 MPa
Proof Stress20 Min MPa
Hardness Brinell20 HB

Alloy Designations

Aluminium alloy 1050 also corresponds to the following standard designations and specifications but may not be a direct equivalent:

AA1050A

S1B

A91050


Temper Types

The most common tempers for 1050 aluminium are:

  • O – Soft
  • H14 – work hardened by rolling to half hard, not annealed after rolling

Supplied Forms

Plain sheet
Plain sheet with a PVC coating on one side
Stucco sheet
Stucco sheet with a PVC coating on one side
Shate

  • Sheet

Weldability

When welding 1050 to itself or an alloy from the same subgroup the recommended filler wire is 1100. For welding to alloys 5083 and 5086 or alloys from the 7XXX series, the recommend wire is 5356. For other alloys use 4043 filler wire.


Fabrication

Workability – Cold: Excellent

Machinability: Poor

Weldability – Gas: Excellent

Weldability – Arc: Excellent

Weldability – Resistance: Excellent

Brazability: Excellent

Solderability: Excellent

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