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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In tests of soft rod made at speeds not greater than 12 in. No edge rolling is required.
This standard does not purport to address all of the safety concerns, if any, associated with its use. Embrittlement test shall be performed on the specimen to reflect propensity towards hydrogen embrittlement and shall astn performed only on oxygen-free copper.
The electrolyte shall be a 0. Current edition approved May 1, This standard does not purport to address all of the safety concerns, if any, associated with its use.
When this reaction is complete, reduction of the cupric oxide occurs at a higher voltage. Therefore, no standardized test is recommended. It is awtm responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
However, in the event of failure of a rod specimen to conform to the criteria of 7.
ASTM B49 – 17
aetm C, C, C, and C The weight shall be supported initially with a platform and loaded onto the spiral uniformly and smoothly by either of two methods, namely: An ASTM method has not been developed.
Cuprous oxide is reduced initially. Other equivalent annealing methods may be used. This test is performed by reducing the surface oxide s to copper in an electrolytic cell. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. 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.
For example, the wire shall either be allowed to cool for 5 min between passes or quenched to ambient temperature after each pass.
ASTM B49 – 17 – Standard Specification for Copper Rod for Electrical Purposes
B 49 — 98 Reapproved Standard Speci? This constitutes a second bend. Hardness shall be measured along the center xstm of the annealed specimen using the Rockwell F scale, in accordance with Test Method E Copper wire is initially given a low temperature anneal under tightly controlled conditions, subsequently wound into a spiral helical con? Rejection and Rehearing The change in length measured after the weight is removed, and the spiral has relaxed, is considered as a measure of softness.
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.
This is equivalent to a resistivity value of Test Method E should be referenced for the determination of silverbearing alloys permitted under this speci? The as-received sample shall be cold rolled to a? Physical Property Requirements 7. Make each successive bend in the opposite direction from the previous bend see Test Methods B Work Item s – proposed revisions of this standard.
After drawing, a coil of the wire shall be formed by winding the conductor around a mandrel having a minimum diameter of mm 7. 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. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
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. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
This sample shall either be annealed or not annealed according to the following circumstances: 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.
However, a discussion will be found h49 Notes X1. A complete discussion of this subject is contained in NBS Handbook Using an indelible marking tool, a mm gage length is marked over the midlength of the copper wire. This abstract is a brief summary of the referenced standard. Copper asttm 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 asfm.
C, C, and C as de? The rod shall be fabricated from copper of such quality and purity.
ASTM B49 – 17 Standard Specification for Copper Rod for Electrical Purposes
Material and Manufacture 5. It is also equivalent, for example, to 1. 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 mA. 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. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Temperature of the copper wire must be kept uniform and measured quite accurately. Note that the load is not to be removed by either raising the platform or lowering the upper end of the spiral.