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.
|Published (Last):||11 November 2012|
|PDF File Size:||16.57 Mb|
|ePub File Size:||6.68 Mb|
|Price:||Free* [*Free Regsitration Required]|
Workmanship, Finish and Appearance In the case of oxygen-free silver-bearing coppers, the designation OFS oxygen-free, silver-bearing will be used as shown in Classi?
ASTM B49 – 17 – Standard Specification for Copper Rod for Electrical Purposes
In the case of tests on soft or annealed copper rod, however, the effects of speed of testing are not pronounced. This test is performed by reducing the surface oxide s to copper in an electrolytic cell. However, a discussion will be found in Notes X1.
The latter term means that a copper wire 1 m in length and weighing 1 g would have astk resistance of 0. C, C, C, and C Test Procedures—A mm-long test sample is cut from the annealed coil of wire. 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 asgm. The value of 0. However, in the event of failure of a rod specimen to conform to the criteria of 7.
Rejection and Rehearing 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. 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. Cuprous oxide is reduced initially. The weight shall be supported initially with a platform and loaded onto the spiral uniformly and smoothly by either of two methods, namely: Make each successive bend in the opposite direction from the previous bend see Test Methods B Material and Manufacture 5.
Failure to conform shall be cause for rejection. Before testing, clean each rod sample of oil or grease using acetone or an equivalent solvent.
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. Astn 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.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
This standard has been approved for use by agencies of the Department of Defense. Temperature of the copper wire must be kept uniform and measured quite accurately.
The manufacturer shall afford the inspector representing the purchaser all reasonable facilities to satisfy him that the material being furnished is in accordance h49 this speci? 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. Samples of 4 4 For a description of a similar, yet alternative standard procedure to determine tarnish?
This standard does not purport to address all of the safety concerns, if any, associated with its use. This is equivalent to a resistivity value of This constitutes a second bend. Work Item s – proposed revisions of this standard. 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 sstm 0.
In tests of soft rod made at speeds not greater than 12 in. G Not including oxygen. Particular care should be taken to avoid excessive heating of the copper during drawing.
Mechanical Property Requirements 8. 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. It is the awtm 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. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Since good temperature control is extremely important, thermocouples should be placed at strategic locations throughout the annealing device.
C, C, and C as de? It is also equivalent, for example, to 1. Copper wire is initially given a low temperature anneal under tightly controlled conditions, subsequently wound into a aastm helical con?
ASTM B49 – 17
The values given in parentheses are for information only. Supply current from a dc power supply or a coulometer.
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.
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. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. This abstract is a brief summary of the referenced standard. Originally approved in Note that the load is not to be removed by either raising the platform or lowering the upper end of the spiral.
Current edition 4b9 May 1, It is recommended that an 8-mm-diameter dummy rod sample be formed into a mm-diameter ring and placed in the constant temperature b499 at the same position normally occupied by the test wire. Embrittlement test shall be performed on the specimen to reflect propensity towards hydrogen embrittlement and shall be performed only on oxygen-free copper.
A complete discussion of this subject is contained in NBS Handbook