Global Aluminum Alloy Conversion Chart

Aluminum alloy is a widely used material in fields such as construction, automotive, aerospace, packaging, etc., and the designation standards for aluminum alloy varies in different countries and regions, which brings certain difficulties to the application, communication, and purchase of aluminum alloy.

In order to help customers solve this problem, Chalco has compiled a commonly used international aluminum alloy grade cross-reference table. This standardized tool may help you choose the products in a quick and convenient way.

Global aluminum alloy grade cross-reference chart

Aluminum alloy grade designation standards

ANSI/AA (The Aluminum Association)

AA stands for Aluminum Association and is a widely recognized aluminum designation system around the world. It is designated by the prefix AA, followed by four numeric digits.

• first digit: principal alloying constituent(s)
• second and third digits: specific alloy designation (number has no significance but is unique);
• fourth digit: Casting (0) or ingot (1, 2) designation.

UNS (Unified Numbering System)

UNS stands for Unified Numbering System. This system is popular in the United States. It is a unified identification for metals and alloys of metals.

In this system, the names of metals and alloys of metals consist of a single-letter prefix followed by five digits representing a materials composition. In most cases the letter is suggestive of the family of metals identified.

For aluminium, the prefix letter is A – for aluminum.

ISO (International Organization for Standardization)

The International Organization for Standardization created this designation, and it is pretty different from the previous ones.

The naming system uses the letters Al as prefix, followed by the chemical composition of the alloy.

This naming system is helpful in academia and research but is seldom used in practical endeavors.

EN (European Norm)

EN stands for European Norm. This standard is usually used in EU countries, such as Great Britain (GB), Germany (DIN), France (NF), and Italy (UNI) among others.

The format includes the prefix EN, followed by AC or AW, depending on if the alloy is wrought (AW) or cast (AC). Finally, it is followed by a four-digit code.

For aluminum, this standard's designation involves the prefix EN AW (wrought alloys) and AC (cast alloys), followed by four digits, with the first digit representing the parent alloying element.

DIN (Germany)

DIN-Deutsches Institut für Normung eV(German Institute for Standardization). This standard uses the letter DIN followed by an alphanumeric code or figures representing the chemical composition to name aluminum and aluminum alloys.

BS (Great Britain)

BS is for the British standard and developed by the British Standard Institute. This standard use alphanumeric characters to represent aluminum alloy. The alphabet represents main alloying element, and the figures represent the weight percent of the main alloying element.

AFNOR (France)

AFNOR is a France organization, Association Française de Normalisation, means French Standardization in English. Aluminum alloys are named using an alphanumeric system in which the first letter, A, designates the name of the element, and the ensuing letters and numbers designate the alloying elements and their percentages.

UNE (Spain)

UNE is a Spain organization, Asociación Española de Normalización, means Spanish organization for standardization. In this system, the alloys are designated by a single letter prefix, followed by a four digit number specifying chemical composition.

JIS (Japan)

JIS represents for Japanese Industrial Standard, developed by the Japanese Industrial Standards Committee (JISC) in Tokyo. Start with the prefix JIS, followed by the letter A representing the divided area, and then follow by four digits representing the material composition.

CSA (Canada)

CSA stands for Canadian standards association. The CSA system of naming aluminum alloys employs alphanumeric codes which depict the composition and class of the alloys.

SIS (Sweden)

SIS stands for Swedish Institute of Standards, the official standards organization in Sweden. This system names Aluminium alloys by using a four-digit numbering system that describes the main alloying element and its composition.