ASTM B221-08 PDF

A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. NOTE 1—Throughout this speci? NOTE 2—For rolled or cold-? The equivalent Uni?

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A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. NOTE 1—Throughout this speci? NOTE 2—The term cold? Referenced Documents 2. Current edition approved Nov. Published November Originally approved in Last previous edition approved in as B — B Analysis shall be made for the elements for which limits are shown in this table.

C 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? D Others includes listed elements for which no speci? The producer may analyze samples for trace elements not speci? 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.

E Other elements—Total shall be the sum of unspeci? F Vanadium 0. G The aluminum content is the difference between H Vanadium 0. The total for other elements does not include vanadium and zirconium. Terminology 3. However, should subsequent testing by the purchaser establish that the material does not meet these requirements, the material shall be subject to rejection. Ordering Information 4. Manufacture 5. Aluminum Alloy Alloy E Yield StrengthB 0.

C Alloy Tensile Strength, ksi min max Yield StrengthB 0. The basis for establishment of tensile property limits is shown in Annex A1. B The measurement of yield strength and elongation is not required for wire less than 0. C There are no tensile requirements for material in the F temper but it usually can be expected that material 11?

As size increases the strength decreases to nearly that of the O temper. D For stress-relieved tempers, characteristics and properties other than those speci? E Also available in the F temper for which no properties are speci?

F Material in the T42 or T62 tempers is not available from the materials producers. These properties can usually be obtained by the user when material is properly solution heat treated or solution and precipitation heat treated from the O or F temper. These properties also apply to samples of material in the O or F temper that are solution heat treated or solution and precipitation heat treated by the producer to determine that the material will respond to proper heat treatment.

Properties attained by the user, however, may be lower than those listed if the material has been formed or otherwise cold or hot worked, particularly in the O temper, prior to solution heat treatment. G Properties listed for this full size increment are applicable to rod.

Properties listed are also applicable to square, rectangular, hexagonal, or octagonal bar having a maximum thickness of 4 in. H For bar, maximum cross-sectional area is 50 in. I Minimum yield strength for T4 wire and rod 0.

J Properties listed for this size increment are applicable to rod only. K For rounds, maximum diameter is 4 in. L Bend diameter factor values stated for this full size increment apply to T4 product only. Values listed also apply to T product in the 0. Quality Assurance 6. The producer may use his own or any other suitable facilities for the performance of the inspection and test requirements speci? The purchaser shall have the right to perform any of the inspections and tests set forth in this speci?

Chemical Composition 7. Conformance shall be determined by the producer by analyzing samples taken at the time the ingots are cast, or samples taken from the? If the producer has determined the chemical composition of the material during the course of manufacture, sampling and analysis of the?

NOTE 4—It is standard practice in the United States aluminum industry to determine conformance to the chemical composition limits prior to further processing of ingots into wrought products. Due to the continuous nature of the process, it is not practical to keep a speci? Sampling shall be in accordance with Practice E Samples for other methods of analysis shall be suitable for the form of material being analyzed and the type of analytical method used.

NOTE 5—It is difficult to obtain a reliable analysis of each of the components of clad materials using material in its? A reasonably accurate determination of the core composition can be made if the cladding is substantially removed prior to analysis.

The cladding composition is more difficult to determine because of the relatively thin layer and because of diffusion of core elements to the cladding. The correctness of cladding alloy used can usually be veri?

Other methods may be used only when no published ASTM method is available. In case of dispute, the methods of analysis shall be agreed upon between the purchaser and the producer. Heat Treatment 8. Tensile Properties of Material As Supplied 9. Only one specimen shall be taken from any one piece when more than one piece is available. Producer Con? The heat-treated samples may be tested prior to four days natural aging, but if they fail to conform to the T42 temper properties, the tests may be repeated after completion of four days natural aging without prejudice.

Heat Treatment and Reheat Treatment Capability B B A Discontinuities in excess of those listed in this table shall be allowed if it is established that they will be removed by machining or that they are in noncritical areas. B The discontinuity class limits are de?

Bend Properties Stress-Corrosion Resistance Each sample shall be taken from material considered acceptable in accordance with lot-acceptance criteria of Table 4. A minimum of three adjacent replicate specimens shall be taken from each sample and tested. Dimensional Tolerances Table No. Finish Location acceptable acceptable unacceptableB unacceptableB Rolled or cold? Rod and bar in larger sizes may be furnished either as rolled or cold? In addition, and series alloys furnished in the T6, T, T73, T, or T tempers shall also be marked with the lot number in at least one location on each piece.

Internal Quality General Quality Any requirement not so covered is subject to negotiation between the producer and the purchaser. On approval of the purchaser, however, the producer may use a system of statistical quality control for such examinations. Source Inspection Rejection and Retest All specimens so selected for re-test shall meet the requirements of the speci?

As much as possible of the rejected material shall be returned to the producer or supplier. Packaging and Package Marking The applicable levels shall be as speci? Marking for shipment of such material shall be in accordance with Fed.

Keywords For the products described, mechanical property limits for the respective size ranges are based on the analyses of at least data from standard production material with no more than ten data from a given lot. All tests are performed in accordance with the appropriate ASTM test methods.

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A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. NOTE 1—Throughout this speci?

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More B All the products should be produced by hot extrusion or similar methods. The chemical composition of each material is determined in accordance with the specified suitable chemical and spectrochemical test methods. Samples for chemical analysis should be taken when the ingots are poured or from the finished or semi-finished products by drilling, sawing, milling, turning, or clipping. Tensile properties, elongation, and yield strengths of each product should conform to the requirements listed herein. Elongation requirements are not applicable for materials with sizes smaller than the specified limits. This abstract is a brief summary of the referenced standard.

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B Analysis shall be made for the elements for which limits are shown in this table. C For the purpose 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 the figures used in expressing the specified limit, in accordance with the rounding-off method of Practice E D Others 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.

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