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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B — 07 Standard Speci? A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates ast editorial change since the last revision or reapproval. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

ASTM B – 07() Standard Specification for Wire for Use In Wire-Wound Resistors

It is the responsibility of the user of this standard n267 become familiar with all hazards including those identi? Nominal Electrical Resistance per Unit Length 7. NOTE 1—When ribbon or? This is not valid in view of modern rolling equipment and practices, but still is widely used as a basis of description. Ribbon actually is made to a speci? Current edition approved May 1, Originally approved in Last previous edition approved in as B — 90 Temperature Coefficient of Resistance 8.

The mean temperature coefficient of resistance referred to Copyright?

No further reproductions authorized. D in Diameter in. Values shown for other classes are for information only. B Alloy Classes 1a, 1b, 1c, 2a, 2b, 3a, 4, and 6 are designed to give a low emf versus copper.

Maximum indicates the maximum deviation from zero and the plus or minus sign the polarity of the couple. C The maximum temperature values listed apply to the alloy wire only. Caution astk be exercised pending knowledge of the maximum temperature of use for the coating material involved.

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ASTM B267 – 07(2018), Standard Specification for Wire for Use In Wire-Wound Resistors

D If metric sizes are desired, 1 in. All of the information included in this note is based on measurements made in accordance with Test Method B This slope is determined from the following equation: Permissible Variations in Electrical Resistance Permissible Variations in Dimensions The electrical resistance per unit length can be determined more accurately than the dimensions of very small wire.

The tension on the wire shall not exceed one half of its yield strength. The surface of the coating shall be smooth and uniform.

ASTM-B | Standard Specification for Wire for Use In Wire-Wound Resistors | Document Center, Inc.

The enamel shall not be underbaked so that one turn adheres to the next on a spool. The test shall be made 2 to 10 min after removal of the wire from the oil, lightly wiping off the excess oil.

It shall include both single and double coverings. The second covering shall be wrapped in the opposite direction from the? It shall be free from voids or bare spots and have a minimum of back twist.

The covering shall be sufficiently closely wrapped so that, when the wire is bent around a mandrel having a diameter ten times the 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.

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Outside Diameter, max, in. 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 alloys covered by these speci?

To convert from pounds to kilograms multiply by 0. To convert from inches to millimetres multiply by Alloy Class 1 3 4 5 6 Color purple yellow red pink ivory B — 07 ASTM International takes no position respecting the validity of any asgm rights asserted in connection with any item mentioned in this standard. 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 2b67 responsibility.

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.

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. 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. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.