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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Material and Manufacture 5. Particular care should be taken to avoid excessive heating of the copper during drawing. UNS C only All others 8. Last previous edition approved in as B 49 — 98e2. The rod shall be fabricated from copper of such quality and purity.
Before testing, clean each rod sample of oil or grease using acetone or an equivalent solvent. Softening values for low temperature annealing copper and for other types of copper rods, if requested, shall be decided upon between the producer and the user. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
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. Other temperatures and times may be used by special agreement between the manufacturer and purchaser.
Samples of 4 4 For a description of a similar, yet alternative standard procedure to determine tarnish? Rejection and Rehearing The value of 0.
The specimen shall have the following chemical composition: Packaging and Package B9 Test Method E should be referenced for the determination of silverbearing alloys permitted under this speci? In the case of tests on soft or annealed copper rod, however, the effects of speed of testing are not pronounced. The as-received sample shall be cold rolled to a? Workmanship, Finish and Appearance 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. B 49 — 98 the rejected product shall be taken in sstm with the product speci? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Link to Active This link will always route atm the current Active version of the standard.
A complete discussion of this subject is contained in NBS Handbook Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
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. Make sure that each specimen undergoes the bend test in accordance with Test specimens processed to a diameter other than 0. Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: Temperature of the copper wire must be kept uniform and measured quite accurately.
Copper wire is initially given a low temperature anneal under tightly controlled conditions, subsequently wound into a spiral helical con? Originally approved in A number in parentheses indicates the year of last reapproval. Number of Tests and Retests Therefore, no standardized test is recommended. 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. The fracture shall be between gage marks and not closer than 1 in. C, C, C, and C Although 10 milliampere mA is a typical value of current, xstm is best to have equipment capable of operating in the range of 1 to 20 mA. 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 4b9 table for an additional period of 1 min.
Because of the uncertain correlation with performance, and the subjective aspect of interpretation, these tests should only be used as an indicator of in-house process control.
Embrittlement test shall be performed on the specimen to reflect propensity towards hydrogen embrittlement and shall be performed only on oxygen-free copper. This standard does not purport to address all of the safety concerns, if any, associated with its use.
The latter term means that a copper wire 1 m in length and weighing 1 g would have a resistance of 0. For example, the wire shall either be allowed to cool for 5 min between passes or quenched to ambient temperature after each pass. The change in length measured after the weight is removed, and the spiral has relaxed, is considered as a measure b9 softness.
It is also equivalent, for example, to 1. 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 Reapproved Standard Speci? The weight shall be supported initially with a platform and loaded onto the spiral uniformly and smoothly by either of two methods, namely: From B Grade 1 aatm or equivalent.
Note that the load is not to be removed by either raising the platform or lowering the upper end of the spiral.
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