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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All alloys covered by these speci?
The nominal resistance per unit length for a round wire is calculated from the nominal resistivity and nominal cross-sectional area. Nominal Electrical Resistance per Unit Length 7. Temperature Coefficient of Resistance 8.
B Alloy Classes 1a, asgm, 1c, 2a, 2b, 3a, 4, and 6 are designed to give a low emf versus copper. B — 07 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Values shown for other classes are for information only.
The values given in parentheses are ast, conversions to SI units that are provided for information only and are not considered standard. D in Diameter in. Link to Astmm This link will always route to the current Active version of the standard.
It shall be free from voids or bare spots and have a minimum of back twist. This slope is determined from the following equation: The electrical resistance per unit length can be determined more accurately than the dimensions of very small wire.
ASTM B – 07 Standard Specification for Wire for Use In Wire-Wound Resistors
The tension on the wire shall not exceed one half of its yield strength. The surface of the coating shall be smooth and uniform. NOTE 1—When ribbon or? The wires and ribbons, which may have asfm 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.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. The mean temperature coefficient of resistance referred to Copyright? Alloy Class 1 3 4 5 6 Color purple yellow red pink ivory No further reproductions authorized.
ASTM-B | Standard Specification for Wire for Use In Wire-Wound Resistors | Document Center, Inc.
Outside Diameter, max, in. 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. If astn 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.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Maximum indicates the maximum deviation from zero and the plus or minus sign the polarity of the couple. The second covering shall be wrapped in the opposite direction from the?
Ribbon actually is made to a speci? Historical Version s – view previous versions of standard.
Permissible Variations in Electrical Resistance This abstract is a brief summary of the referenced standard. Caution should be exercised pending knowledge of the zstm temperature of use for the coating material involved.
C The maximum temperature values listed apply to the alloy wire only. To convert from inches to millimetres multiply by This is not valid in view of modern rolling equipment and practices, but still is widely used as a basis of description.
ASTM B267 – 07(2018), Standard Specification for Wire for Use In Wire-Wound Resistors
Permissible Variations in Dimensions To convert from pounds to kilograms multiply by 0. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
All of the information included in this note is based on measurements made in accordance with Test Method B 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 aetm own responsibility.
Current edition approved May 1, The enamel shall not be underbaked so that one turn adheres to the next on a spool.