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Used in USAEC-RDT Standards

Designation: B308/B308M – 10

Standard Specification for

Aluminum-Alloy 6061-T6 Standard Structural Profiles1
This standard is issued under the fixed designation B308/B308M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year oflast reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.

TABLE 1 Chemical Composition LimitsA,B,C
Alloy 6061
Silicon
Iron
Copper
Manganese
Magnesium
Chromium
Zinc
Titanium
Other elementsDeach
TotalE
Aluminum

NOTE 1—For other extruded profilesin other alloys and tempers refer to
Specification B221.

1.3 Alloy and temper designations are in accordance with
ANSI H35.1/H35.1M. The equivalent Unified Numbering
System alloy designation is that in Table 1 preceded by A9, or
A96061 for alloy 6061 in accordance with Practice E527.
1.4 For acceptance criteria for inclusion of new aluminum
and aluminum alloys in this specification, seeAnnex A2.
1.5 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
with the standard.
1.6 This standard does not purport to address all of the
safetyconcerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

A

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
remainder

Where single units are shown, these indicate the maximum amounts permit-

ted.
BAnalysis shall be made for the elements for which limits are shown in this table.
For 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.
D
Othersincludes all 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 ofTotal, the material shall be considered nonconforming.
E
Other Elements—Total shall be the sum of unspecified metallic elements
0.010 % or more, rounded to the second decimal before determining the sum.

Extruded Bars, Rods, Wire, Profiles, and Tubes
B557 Test Methods for Tension Testing Wrought and Cast
Aluminum- and Magnesium-Alloy Products
B557M Test Methods for Tension Testing Wrought andCast
Aluminum- and Magnesium-Alloy Products (Metric)
B647 Test Method for Indentation Hardness of Aluminum
Alloys by Means of a Webster Hardness Gage
B648 Test Method for Indentation Hardness of Aluminum
Alloys by Means of a Barcol Impressor
B660 Practices for Packaging/Packing of Aluminum and
Magnesium Products
B666/B666M Practice for Identification Marking of Aluminum and MagnesiumProducts
B807/B807M Practice for Extrusion Press Solution Heat
Treatment for Aluminum Alloys
B881 Terminology Relating to Aluminum- and MagnesiumAlloy Products
B918 Practice for Heat Treatment of Wrought Aluminum
Alloys
D3951 Practice for Commercial Packaging

1
This specification is under the jurisdiction of ASTM Committee B07 on Light
Metals and Alloys and is the direct responsibility of...