ASTM B standard specification for copper beryllium alloy rod and bar – Designation: B /B The following alloys meet the ASTM-B standard. Select an alloy for product specifications: C Copper Alloy C is the most commonly specified. ASTM B, AMS , SAE J, RWMA CLASS IV. C is also known as Alloy 25 and is the most commonly utilized beryllium copper alloy and is notable .
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The following three alloys are included: C shall be the alloy furnished whenever Speci?
Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values asstm the two systems may result in nonconformance with the speci?
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 asstm. Current edition approved April 1, Originally approved in to replace portions of B — 41 T. 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. Materials and Manufacture 6. C, C, or C, cast and worked and of such purity and soundness as to be suitable for processing into the products prescribed herein.
These products meet property requirements in Table 3 and normally require no further heat treatment by the user. Precipitation Heat Treatment 9. These special combinations of properties such as increased ductility, electrical conductivity, dimensional accuracy, endurance life, and resistance to elastic drift and hysteresis in springs, may be obtained by special precipitation-hardening heat treatments.
The mechanical requirements of Table 3 do not apply to such special heat treatments. Further thermal treatments of these tempers are not normally required. Mechanical Property Requirements The tensile strength requirements shall be prescribed in Table 2 and Table 3 after precipitation heat treatment in accordance with 8.
The hardness requirements shall be as prescribed in Table 2 for solution heat treated or solution heat treated asmt cold worked and in Table 4 after prescribed heat treatment. The tension test should not be made except when indicated by the purchaser.
Dimensions and Permissible Variations Workmanship, Finish and Appearance Number of Tests and Retests One is to be tested in the as-sampled condition, and one in the precipitation heat-treated condition.
Only two such reheat treatments shall be permitted. Full cross section or machined specimens shall be as speci? NOTE 1—Mechanical property data determined on other than round cross sections, for sizes under 0. TF00 Solution heat treated AT up to 3, ast.
C The upper limits in the tensile strength column are for design guidance only. Solution heat treated A Hard H all sizes up to 3? Approved April 1, The following section was renumbered.
Beryllium Copper Bar
This was corrected to the proper 10 — 25 incl. 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?
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ASTM B / BM – 07 Standard Specification for Copper-Beryllium Alloy Rod and Bar
B1196 comments will receive ast 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 phonefaxor service astm.