ThePipingMart Blog Grades 1200 Aluminium (UNS A91200) – Composition, Properties, and Uses

1200 Aluminium (UNS A91200) – Composition, Properties, and Uses

1200 Aluminium - Composition, Properties, Uses

UNS A91200 is an aluminum, zinc, magnesium, and copper alloy. This alloy has excellent mechanical properties, making it a popular choice when a lightweight but strong material is needed. In this blog post, we’ll take a closer look at the composition of aluminium 1200, its chemical and physical properties, its uses, corrosion resistance, heat resistance, and heat treatment options, as well as its machining and welding capabilities.

What Forms is Aluminium 1200 Available at Piping Mart?

  • Aluminium 1200 Plates
  • Aluminium 1200 Coil
  • Aluminium 1200 Foil
  • Aluminium 1200 Sheet

1200 Aluminium Composition

UNS A91200 consists of 98.2% aluminum with smaller amounts of zinc (0.8%), magnesium (1%), and copper (0.4%). This combination provides excellent mechanical strength while also giving the alloy good corrosion resistance and high-temperature stability.

Element Content (%)
Aluminum, Al ≥ 99
Silicon, Si + Iron, Fe ≤ 1
Zinc, Zn ≤ 0.10
Copper, Cu ≤ 0.050
Titanium, Ti ≤ 0.050
Manganese, Mn ≤ 0.050
Other (each) ≤ 0.050
Other (total) ≤ 0.15

1200 Aluminium Alloy Chemical Properties

AL 1200 has a low melting point of 454°C (849°F) and a boiling point of 1010°C (1850°F). Its density is 2.7 g/cc (0.0975 lbs/in3), which makes it relatively lightweight compared to other metals such as steel or bronze. Its electrical conductivity is 28% IACS at 20°C (68°F), and its thermal conductivity is 125 W/mK (90 BTU/hr•ft•oF). It also has excellent electrical insulation properties with dielectric constant values ranging from 0 to 1 depending on temperature.

A91200 Aluminium Mechanical Properties

The mechanical properties of AL A91200 Alloy depend on the tempering condition of the material; in general, however, it exhibits good tensile strength up to 500 MPa (72 ksi) with elongation values up to 12%. It also shows good fatigue strength at room temperature with endurance limits ranging from 100 to 200 MPa (14–29 ksi). The hardness ranges from 60–100 HRB depending on the tempering condition.

Properties Metric Imperial
Tensile strength 70 – 105 MPa 10152-15228 psi

Aluminum 1200 Alloy Physical Properties

The physical properties of UNS A91200 include:

  • Good ductility with low strain hardening rates.
  • High thermal conductivity.
  • Low electrical resistivity.
  • Good machinability.
  • Superior weldability.
  • Excellent corrosion resistance at ambient temperatures.
  • High-temperature oxidation resistance.
  • Excellent stress corrosion cracking resistance in chloride environments.
  • Low magnetic permeability.
Properties Metric Imperial
Density 2.70 g/cm3 0.0975 lb/in3

1200 Aluminium Equivalent

  • Al 99.0
  • Alcoa-102
  • BA 99.0%
  • Star-99.2
  • Duricilium-T (99.0%)
  • Hiduminium-1C

Aluminium 1200 Specifications

• 6L16, Alloy 1200 • 6L17, Alloy 1200
• 5L34, Alloy 1200 • 4L54, Alloy 1200
• L116, Alloy 1200 • BS 1C
• BA 99.0% • Grade 1200

1200 Aluminium Uses

Due to its combination of chemical elements, aluminum 1200 Alloy finds many uses in industrial settings where strength is needed. Still, weight, such as aircraft parts or automotive components, must be kept down. It can also be used in electrical applications due to its high electrical insulation properties or even in medical settings due to its non-toxicity and non-allergenic qualities.

  • Aluminium is used in the production of automobiles.
  • Aluminium is used in the construction industry.
  • Aluminium is used in the production of aircraft.
  • Aluminium is used in the food industry.
  • Aluminium is used in the medical industry.
  • Aluminium is used in the electronics industry.
  • Aluminium is used in the packaging industry.
  • Aluminium is used in the cosmetics industry.
  • Aluminium is used in the furniture industry.
  • Aluminium is used in the sports industry

Corrosion Resistance

Aluminium Alloy 1200 has excellent corrosion resistance in most environments due to its protective oxide coating that forms on the surface when exposed to oxygen or moisture. This oxide layer is very thin but forms quickly enough that it helps protect the underlying metal from further oxidation or corrosion damage over time.

Heat Resistance

UNS A91200 can handle temperatures up to 1010ºC without melting or degrading significantly over time due to its high melting point combined with its ability to form a protective oxide layer on the surface that prevents further oxidation or degradation from occurring even at higher temperatures than what would normally cause damage for other metals like steel or iron alloys.

Heat Treatment

Heat treatment options for aluminium1200 include solution treating followed by quenching and then aging for increased strength or annealing for improved ductility, depending on how you want your final product to perform under different conditions such as elevated temperatures or stresses from impact loading, etc.


Machining operations are relatively easy for aluminium1200, thanks mainly due to its good machinability characteristics, which allow it to cut easily without producing too much wear on your cutting tools while still achieving tight tolerances if desired during production runs, etc.


Welding operations are also possible using either gas tungsten arc welding(GTAW)or shielded metal arc welding(SMAW)methods. However, those require additional precautions, such as using proper filler materials, etc.


In summary, aluminium1200 is an ideal choice when looking for a light weight yet strong metal that can handle elevated temperatures without degrading over time due to oxidation, etc. It offers excellent mechanical properties combined with good corrosion resistance making it perfect for use in many different industries, including aerospace, automotive, medical, etc. Additionally, machining & welding operations are possible given proper precautions making this material truly versatile & able to meet almost any design requirement you may have! Thanks for reading!

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