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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When the individual reactions between the oxides and hydrogen ions are complete, gaseous hydrogen is evolved and may be seen visually at the surface of the copper rod sample. B 49 — 98 the rejected product shall be taken in accordance with the product speci? The manufacturer shall afford the inspector representing the purchaser all reasonable facilities to satisfy him that the material being furnished is in accordance with this aastm
ASTM B49 – 17
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.
Copper wire is initially given a low temperature anneal under tightly controlled conditions, subsequently wound into a spiral atm con? UNS C only All others 8. A number in parentheses indicates the year of last reapproval.
It is recommended that an 8-mm-diameter dummy rod sample be formed into a mm-diameter ring and placed in the constant temperature bath at the same position normally occupied by the test wire. From B Grade 1 copper or equivalent. For a more thorough description of b94 tests, refer to the Journal of Testing and Evaluation. It is the responsibility of the user of this standard to establish aastm safety and health practices and determine the applicability of regulatory limitations prior to use.
This standard does not purport to address all of the safety concerns, if any, associated with its use. Because of the uncertain correlation with performance, and the subjective aspect of interpretation, these tests should only be used as asrm indicator of in-house process control. Hardness shall be measured along the center line of the annealed specimen using the Rockwell F scale, in accordance with Test Method E The latter term means that a copper wire 1 m in length and weighing astj g would have a resistance of 0.
Particular care should be taken to avoid excessive heating of the copper during drawing. D From B Grade 2 copper or equivalent. This constitutes a second bend. Current edition approved May 1, 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.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned g49 this standard. Failure to conform shall be cause for rejection. The rod astn be fabricated from copper of such quality and purity. In the case asfm tests on soft or annealed copper rod, however, the effects of speed of testing are not pronounced.
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. The specimen shall have the following chemical composition: The weight shall be supported initially with a platform and loaded onto the spiral uniformly and smoothly by either of two methods, namely: Mechanical Property Requirements 8. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
An ASTM method has not been developed. This test is performed by reducing the surface oxide s to copper in an electrolytic cell. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
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. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? C, C, and C as de? 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.
The change in length measured after the weight is removed, and the spiral has relaxed, is considered as a measure of softness. Note that the load is not to be removed by either raising the platform or lowering the upper end of the spiral.
This standard has been approved for use by agencies of the Department of Defense. Supply current from a dc power supply or a coulometer. When this reaction is complete, reduction of the cupric oxide occurs at a higher voltage. The rod shall be free of defects, but blemishes of a nature that do not interfere with the intended application are acceptable.
The as-received sample shall be cold rolled to a?
ASTM B49 – 17 Standard Specification for Copper Rod for Electrical Purposes
Number of Tests and Retests Test Procedures—A mm-long test sample is cut from the annealed coil of wire. 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.
After drawing, a coil of the wire shall be formed by winding the conductor around a mandrel having a minimum diameter of mm 7. A complete discussion of this subject is contained in NBS Handbook This sample shall either be annealed or not annealed according to the following circumstances: Cuprous oxide is reduced initially.
Using an indelible marking tool, a mm gage length is marked over the midlength of the copper wire. No edge rolling is required. In the case of oxygen-free silver-bearing coppers, the designation OFS oxygen-free, silver-bearing will be used as shown in Classi?
Embrittlement test shall be performed on the specimen to reflect propensity towards hydrogen embrittlement and shall be performed only on oxygen-free copper. Link to Active This link will always route to the current Active version of the standard.