ASTM B Standard Specification for Wire for Use In Wire-Wound Resistors. ASTM-B – Download as PDF File .pdf), Text File .txt) or read online. Non Ferrous Standard. This specification covers round wires and ribbons with controlled electrical properties made from magnetic and nonmagnetic class 1a alloys.
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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.
This slope is determined from the following equation: Originally approved in Nominal Electrical Resistance per Unit Length 7.
ASTM B267 – 07(2018), Standard Specification for Wire for Use In Wire-Wound Resistors
It is informational only and not an official part of the standard; the full text of asttm standard itself must be referred to for its use and application. D in Diameter in.
It shall include both single and double coverings. This abstract is a brief summary of the referenced standard. C The maximum temperature values listed apply to the alloy wire only.
Caution should be exercised pending knowledge of the maximum temperature of use for the coating material involved. The surface of the coating shall be smooth and uniform. The mean temperature coefficient of resistance referred to Copyright? Alloy Class 1 3 4 5 6 Color purple yellow red pink ivory Historical Version s – view previous versions of standard.
The enamel shall not be underbaked so that one turn adheres to the next on a spool. Link to Active This link will always route to the current Active version of the standard. To convert from inches to millimetres multiply by A superscript epsilon e indicates an atsm change since the last revision or reapproval. To convert from pounds to kilograms multiply by 0.
ASTM-B | Standard Specification for Wire for Use In Wire-Wound Resistors | Document Center, Inc.
Wire larger in diameter than sizes listed in Table 6 may be supplied on spools Table 7 or in coils depending on agreement between the manufacturer and the purchaser. All of the information included in this note b2667 based on measurements made in accordance with Test Method B Permissible Variations in Dimensions Permissible Variations in Electrical Resistance Values shown for other classes are for information only.
The nominal resistance per unit length for a round wire is calculated from the nominal resistivity and nominal cross-sectional area. This is asym valid in view of modern rolling equipment and practices, but still is widely used as a basis of description. The test shall be made 2 to 10 min after removal of the wire from the oil, lightly wiping off the excess oil.
ASTM B – 07() Standard Specification for Wire for Use In Wire-Wound Resistors
B — 07 Standard Speci? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Current edition approved May 1, 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. 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.
The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
The tension astn the wire shall not exceed one half of its yield xstm. The second covering shall be wrapped in the opposite direction from the? Last previous edition approved in as B — 90 Each bare wire should conform to the requirements for nominal resistivity, elongation, thermal electromotive force with respect to copper, and the temperature coefficient of resistance contained in this specification.
A number in parentheses indicates the year of last reapproval. B — 07 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. No further reproductions authorized. Individual reprints single or multiple adtm of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Temperature Coefficient of Resistance 8. The wires and ribbons, which may have insulated coverings or enamel coatings, are recommended for use in wire-wound resistance units like precision resistors and other similar applications, but not for use as electrical heating elements.
This specification covers round wires and ribbons with controlled electrical properties made from magnetic and nonmagnetic class 1a v267. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. It shall be free from astn or bare spots and have a minimum of back twist. Ribbon actually is made to a speci?
The covering shall be sufficiently closely wrapped so that, when the wire is bent around a mandrel having a diameter ten times atsm overall diameter of the covered wire, using only enough tension to give an even compact layer, the wrappings will not open enough to make the wire underneath visible to the unaided eye.
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.