Editorial Feature

Aluminium Alloys - Composition of Drawn Seamless Tubes

Sep 17 2012

The following table outlines the chemical composition limits for drawn seamless tubes.

Composition (wt.%)
Alloy Si Fe Cu Mn Mg Cr Zn Ti Bi Pb Other ElementsE Al, min
Each TotalF
1060 0.25 0.35 0.05 0.03 0.03 - 0.05 0.03 - - 0.03G - 99.60 minH
1100 0.95 Si + Fe - 0.05-0.20 0.05 - - 0.1 - - - 0.05 0.15 99.00 minH
2011 0.4 0.7 5.0-6.0 - - - 0.3 - 0.20-0.6 0.20-0.6 0.05 0.15 balance
2014 0.50-1.2 0.7 3.9-5.0 0.40-1.2 0.20-0.8 0.1 0.25 0.15 - - 0.05 0.15 balance
2024 0.5 0.5 3.8-4.9 0.30-0.9 1.2-1.8 0.1 0.25 0.15 - - 0.05 0.15 balance
3003 0.6 0.7 0.05-0.20 1.0-1.5 - - 0.1 - - - 0.05 0.15 balance
3102 0.4 0.7 0.1 0.05-0.40 - - 0.3 0.1 - - 0.05 0.15 balance
5005 0.3 0.7 0.2 0.2 0.50-1.1 0.1 0.25 - - - 0.05 0.15 balance
5050 0.4 0.7 0.2 0.1 1.1-1.8 0.1 0.25 - - - 0.05 0.15 balance
5052 0.25 0.4 0.1 0.1 2.2-2.8 0.15-0.35 0.1 - - - 0.05 0.15 balance
5083 0.4 0.4 0.1 0.40-1.0 4.0-4.9 0.05-0.25 0.25 0.15 - - 0.05 0.15 balance
5086 0.4 0.5 0.1 0.20-0.7 3.5-4.5 0.05-0.25 0.25 0.15 - - 0.05 0.15 -
5154 0.25 0.4 0.1 0.1 3.1-3.9 0.15-0.35 0.2 0.2 - - 0.05 0.15 balance
5456 0.25 0.4 0.1 0.50-1.0 4.7-5.5 0.05-0.20 0.25 0.2 - - 0.05 0.15 balance
6061 0.40-0.8 0.7 0.15-0.40 0.15 0.8-1.2 0.04-0.35 0.25 0.15 - - 0.05 0.15 balance
6063 0.20-0.6 0.35 0.1 0.1 0.45-0.9 0.1 0.1 0.1 - - 0.05 0.15 balance
6262 0.40-0.8 0.7 0.15-0.40 0.15 0.8-1.2 0.04-0.14 0.25 0.15 0.40-0.7 0.40-0.7 0.05 0.15 balance
7072 claddingI 0.7 Si + Fe - 0.1 0.1 0.1 - 0.8-1.3 - - - 0.05 0.15 balance
7075J 0.4 0.5 1.2-2.0 0.3 2.1-2.9 0.18-0.28 5.1-6.1 0.2 - - 0.05 0.15 balance
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ALimits are in weight percent maximum unless shown as a range or otherwise stated.

BAnalysis shall be made for the elements for which limits are shown in this table.

CFor purposes of determining conformance to these limits, an observed value or a calculated value obtained from analysis shall be rounded to the nearest unit in the last right-hand place of figures used in expressing the specified limit, in accordance with the rounding-off method of Practice E29.

DIn case of a discrepancy in the values listed in Table 1 with those listed in the International Alloy Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys (known as the “Teal Sheets”), the composition limits registered with the Aluminum Association and published in the “Teal Sheets” shall be considered the controlling composition.

EOthers includes listed elements for which no specific limit is shown as well as unlisted metallic elements. The producer may analyze samples for trace elements not specified in the specification. However, such analysis is not required and may not cover all metallic Others elements. Should any analysis by the producer or the purchaser establish that an Others element exceeds the limit of Each or that the aggregate of several Others elements exceeds the limit of Total, the material shall be considered non-conforming.

FOther elementsTotal shall be the sum of unspecified metallic elements 0.010 % or more, rounded to the second decimal before determining the sum.

GVanadium 0.05 % max.

HThe aluminum content shall be calculated by subtracting from 100.00 % the sum of all metallic elements present in amounts of 0.010 % or more each, rounded to the second decimal before determining the sum.

IComposition of cladding alloy as applied during the course of manufacture. The samples from finished tube shall not be required to conform to these limits.

JA Zr +Ti limit of 0.25 percent maximum may be used with this alloy designation for extruded and forged products only, but only when the supplier or producer and the purchaser have mutually so agreed. Agreement may be indicated, for example, by reference to a standard, by letter, by order note, or other means which allow the Zr +Ti limit.

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