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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Temperature of the copper wire must be kept uniform and measured quite accurately. One end of the test sample is? The specimen shall have the following chemical composition: Therefore, no standardized test is recommended. Rejection and Rehearing This standard has been approved for use by agencies of the Department of Defense. Mechanical Property Requirements 8.
However, a discussion will be found in Notes X1. Link to Active This link will always route to the current Active version of the standard.
Particular care should be taken to avoid excessive heating of the copper during drawing. In the case of oxygen-free silver-bearing coppers, the designation OFS oxygen-free, silver-bearing will be used asmt shown in Classi?
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.
B 49 — 98 the rejected product shall be taken in accordance with the product speci? NOTE 1—The following speci? Xstm this reaction is complete, reduction of the cupric oxide occurs at a higher voltage.
ASTM B49 – 17 Standard Specification for Copper Rod for Electrical Purposes
The rod shall be free of defects, but blemishes of a nature that do not interfere with the intended application are acceptable.
The electrolyte shall be a 0. This standard does not purport to address all of the safety concerns, if any, associated with its use. Cuprous oxide is reduced initially.
The as-received sample shall be cold rolled to a? From B Grade 1 copper or equivalent. Packaging and Package Marking 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. This specification covers the requirements for rod drawing stock produced from electrolytic tough-pitch or oxygen-free coppers and is suitable for further fabrication into electrical conductors.
ASTM B49 – 17
Atsm fracture shall be between gage marks and not closer than 1 in. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. A number in parentheses indicates the year of last reapproval. C, C, C, and C This test is performed by reducing the surface oxide s to copper in an electrolytic cell.
C, C, and C as de? The impurity total for UNS C is de?
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Copper wire is initially given a low temperature anneal under tightly controlled conditions, subsequently wound into a spiral helical con? Workmanship, Finish and Appearance Before testing, clean each rod sample of oil or grease using acetone or an equivalent solvent.
An ASTM method has not been developed.
This constitutes a second bend. After 1 min of free suspension, the weight is manually removed in a very careful manner and the elongated spiral is allowed to relax by placing it on a table for an additional period of 1 min. Supply current from a dc power supply or a coulometer.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Make sure that each specimen undergoes the bend test in accordance with The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. In the case of tests on soft or annealed copper rod, however, the effects of speed of testing are not pronounced.
Other temperatures and times may be used by special agreement between the manufacturer and purchaser. For a more thorough description of these astj, refer to the Journal of Testing and Evaluation. When the individual reactions between the oxides and hydrogen ions are complete, gaseous hydrogen is evolved and may be seen visually at the aastm of the copper rod sample.
Using a thermocouple embedded in the rod to a depth equal to the radius, temperature should reach the annealing temperature within a 5-min period. In tests of soft rod made at speeds not greater than 12 in. Using an indelible marking tool, a mm gage length is marked over the midlength of the copper wire.
The v49 term means that a copper wire 1 m in length and weighing 1 g would have a resistance of 0. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.