ASTM有色金属标准.B49 – Designation: B 49 – 98 (Reapproved ) Standard Speci?cation for Copper Rod. Product. Oxygen-Free Copper Rod Cu-OFE-8, Cu-OFE, Cu-OFE, Cu- OFE,. Cu-OFE, Cu-OFE, Cu-OFE Standard. PN-EN , ASTM B ASTM B Standard Specification for Copper Rod for Electrical Purposes. standard by ASTM International, 04/01/ View all product details.
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B 49 — 98 the rejected product shall be taken in accordance with the product speci? This specification covers the requirements for rod drawing stock produced from electrolytic tough-pitch or oxygen-free coppers and is suitable for further awtm into electrical conductors. The value of 0. This abstract is a brief summary of the referenced standard. Temperature of the copper wire must be kept uniform and measured quite accurately.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
The specimen shall have the following chemical composition: Cuprous oxide is reduced initially. This sample shall either be annealed or not annealed according to the following circumstances: The fracture shall be between gage marks and not closer than 1 in.
Embrittlement test shall be performed on the specimen to reflect propensity towards hydrogen embrittlement and shall be performed only on oxygen-free copper.
Rod Treatment—A rod sample of suitable length shall be cut from the end of a coil lot, and if necessary, reduced to a diameter of either 0. Failure to conform shall be cause for rejection. Originally approved in A complete discussion of this subject is contained in NBS Handbook Test specimens processed to a diameter other than 0.
Mechanical Property Requirements 8. Softening values for low temperature annealing copper and for other types of copper rods, if requested, shall astmm decided upon between the producer and the user.
ASTM B49 – 17 – Standard Specification for Copper Rod for Electrical Purposes
Other equivalent annealing methods may asm used. Since good temperature control is extremely important, thermocouples should be placed at strategic locations throughout the annealing device. It is recommended that an 8-mm-diameter dummy rod sample be formed into a mm-diameter aastm and placed in the constant temperature bath at the same position normally occupied by the test wire.
Test Method E should be referenced for the determination of silverbearing alloys permitted under this speci? Atm B Grade 1 copper or equivalent. Packaging and Package Marking The latter term means that a copper wire 1 m in length and weighing 1 g would have a resistance of 0. Samples of 4 4 For a description of a similar, yet alternative standard procedure to determine tarnish?
An ASTM method has not been developed. However, in case of dispute, satm Although 10 milliampere mA is a typical value of current, it is best to have equipment capable of operating in the range of 1 to 20 astn. Test Procedures—A mm-long test sample is cut from the annealed coil of wire. The as-received sample shall be cold rolled to a?
A superscript epsilon e indicates an editorial change since the last revision or reapproval. Supply current from a dc power supply or a coulometer.
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. However, in the event of failure of a rod specimen to conform to the criteria of 7. Physical Property Requirements 7.
Number of Tests and Retests For example, the wire shall either be allowed to cool for 5 min between passes or quenched to ambient temperature after each pass. A number in parentheses indicates the year of last reapproval. This standard does not purport to address all of the safety concerns, 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.
Atsm care should be taken asttm avoid excessive heating of the copper during drawing. Last previous edition approved in as B 49 — 98e2.
ASTM B49 – 17
UNS C only All others 8. Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: Copper of special qualities, forms, or types, as agreed upon between the manufacturer and the purchaser and that will conform to the requirements prescribed in this specification may also be used.
No edge rolling is required. In tests b499 soft rod made at speeds not greater than 12 in. Make each successive bend in the opposite direction from the previous bend see Test Methods B aztm C, C, C, and C 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. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.