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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The nominal resistance per unit length for a round wire is calculated from the nominal resistivity and nominal cross-sectional area. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

Wire asttm in diameter than sizes listed in Table 6 may be supplied bb267 spools Table 7 or in coils depending on agreement between the manufacturer and the purchaser. B — 07 ASTM International takes no position respecting the validity of any patent rights ashm in connection with any item mentioned in this standard. The tension on the wire shall not exceed one half of its yield strength. Originally approved in The surface of the coating shall be smooth and uniform.

ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up astj date. 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.

Last previous edition approved in as B — 90 Permissible Variations in Dimensions D If metric sizes are desired, 1 in. The electrical resistance per unit length can be g267 more accurately than the dimensions of very small wire.

The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Historical Version s – view previous versions of standard. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

A number in parentheses indicates the year of last reapproval. It shall be free from voids or bare spots and have a minimum of back twist. It is the responsibility of the atm of this standard to become familiar with all hazards including those identi? B — 07 Standard Speci?

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

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Values shown for other classes are for information only. 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 is not valid in view of modern rolling equipment and practices, but still is widely used as a basis of description. C The maximum temperature values listed apply to the alloy wire only. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

The v267 temperature coefficient of resistance referred to Copyright? 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-B | Standard Specification for Wire for Use In Wire-Wound Resistors | Document Center, Inc.

B Alloy Classes 1a, b2267, 1c, 2a, 2b, 3a, 4, and 6 are designed to give a low emf versus copper. Permissible Variations in Electrical Resistance No further reproductions authorized. This specification covers round wires and ribbons with controlled electrical properties made from magnetic and nonmagnetic class 1a alloys. Alloy Class 1 3 4 5 6 Color purple yellow red pink ivory A superscript epsilon e indicates an editorial change since the last revision or reapproval.

Link to Active This link will always route to the current Active version of the standard. Nominal Electrical Resistance per Unit Length 7. 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 astj.

It shall include both single and double coverings.

The second covering shall be wrapped in the opposite direction from the? This abstract is a brief summary of the referenced standard. Caution should be exercised pending knowledge of the maximum temperature of use for the coating material involved.

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 slope is determined from the following equation: Current edition approved May 1, Maximum indicates the maximum deviation from zero and the plus or minus sign the polarity of the couple. D in Diameter in. The enamel shall not be underbaked so that one turn adheres to the next on a spool.

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

All alloys covered by these 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. Outside Diameter, max, in.