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ASTM B ASTM A 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. Scope 1. Other coppers may be used upon agreement between supplier and purchaserer. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other.

Combining 1 This speci? Current edition approved Apr. Published May Originally approved in Last previous edition approved in as B — Referenced Documents 2.

General Requirements 3. Terminology 4. Shapes shall not include tube and pipe or other hollow sections. The surface is similar in texture to that of the outside surface of an orange.

Ordering Information 5. Silver The copper value is exclusive of Ag. Impurity maximums in ppm of C shall be: antimony 4, arsenic 5, bismuth 1, cadmium 1, iron 10, lead 5, manganese 0.

E C, C, and C are oxygen-free coppers with the addition of a speci? The compositions of these alloys are equivalent to C plus the intentional addition of silver. G Oxygen and trace elements may vary depending on the process.

H C, C, C, and C are electrolytic tough-pitch copper with silver additions. Over 3? Over 1 [25] to 35 [] 2 [50] incl. Over 2 [50] to 33 [] 3 [75] incl. Over 3 [75] 30 [] Bar: C Light-straightening operation is permitted.

D In any case, a minimum gage length of 1 in. E See Appendix X1. F Special agreement shall be made between the manufacturer or supplier and the purchaser. Materials and Manufacture 6. Chemical Composition 7. Limits for unnamed elements may be established and analysis required by agreement between the manufacturer or the supplier and the purchaser. Temper 8. Physical Property Requirements 9.

Mechanical Property Requirements The approximate Rockwell hardness values for the speci? Performance Requirements Orders for U. Government Agencies Dimensions, Mass, and Permissible Variations Short lengths may be included as prescribed in Table 9. The deviation from absolute straightness of any longitudinal surface or edge shall not exceed the limitations prescribed in Table Measure the maximum depth of arc to the nearest 1?

Over 0. Over 1. Over 2. Percent of speci? A 2 [50] and Under 0. When tolerances are speci? Over 4 [] to 12 [] incl. A Tolerances, Plus and Minus,A in. B Percent of speci? Up to 1. NOTE 2—For the purpose of determining conformance with the dimensional requirements prescribed in this speci?

Specimen Preparation Test Methods Over 1 to 11? Over 11? Over 2 to 3 [50 to 75] incl. Over 1 to 2. Over 4 to 9 [ to ] incl. A B Width times thickness, disregarding any rounded corner or edges. Expressed to the nearest 1? Over 1? The corners, A, will usually be sharp, but shall not have rough or projecting edges. C, refer to the Annex of Speci? Keywords C; UNS No. C NOTE 1—The arc shall not necessarily be tangent at points, A, but shall be substantially symmetrical with the axis of the product, and the product shall be commercially free from sharp, rough, or projecting edges.

Referenced Documents S1. Quality Assurance S2. Except as otherwise speci? The purchaser shall have the right to perform any of the inspections or tests set forth when such inspections and tests are deemed necessary to ensure that the material conforms to prescribed requirements. Preparation for Delivery S4.

This term means that a wire 1 m in length and weighing 1 g would have a resistance of 0. This is equivalent to a resistivity value of It is also equivalent, for example, to 1.

A complete discussion of this Institute of Standards Technology. Rolled or drawn edges to use Table 4 and Table 6. Sawed deburred bar to use Table 5 and Table 7.

Committee B05 has identi? ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phone , fax , or service astm.


ASTM B187/B187M

Historical Version s - view previous versions of standard. Work Item s - proposed revisions of this standard. More B This specification establishes the requirements for copper conductor bars, rods, and shapes for both electrical bus and general applications. Products shall be produced in tempers O60 soft annealed , and H04 hard.


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Offering high electrical conductivity and formability, copper is Also known as ETP copper, it's often used in electrical applications, such as for bus bars and wire connectors, as well as for flashing, gaskets, and rivets. An ultra -thin layer of silver makes these bars slower to tarnish than unplated copper to provide low electrical resistance at contact points over time. With Use it in electrical applications, such as for coaxial cables and terminal lugs.



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