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 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item v267 in this standard.
The wires and ribbons, which may have insulated coverings adtm enamel coatings, are recommended for use in wire-wound resistance units like precision resistors and other similar applications, but not for use as electrical 2b67 elements. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
All of the information included in this note is based on measurements made in accordance with Test Method B Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
This abstract is a brief summary of the referenced standard. No further reproductions authorized. Originally approved in This specification covers asttm wires and ribbons with controlled electrical properties made from magnetic and nonmagnetic class 1a alloys.
ASTM B Standard Specification for Wire for Use In Wire-Wound Resistors_百度文库
This slope is determined from the following equation: Permissible Variations in Electrical Resistance The test shall be made 2 to 10 min after removal of the wire from the oil, lightly wiping off the excess oil. Ribbon actually is made to a speci? A number in parentheses indicates the year of last reapproval.
Last previous edition approved in as B — 90 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.
B — 07 Standard Speci? It shall be free from voids or bare spots and have a minimum of back twist. Link to Active This link will always route to the current Active version of the standard. B Alloy Classes 1a, 1b, 1c, 2a, 2b, 3a, 4, and 6 are designed to give a low emf versus copper.
ASTM B – 07() Standard Specification for Wire for Use In Wire-Wound Resistors
It shall include both single and double coverings. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. The enamel shall not be underbaked so that one turn adheres to the next on a spool.
ASTM B267 – 07(2018), Standard Specification for Wire for Use In Wire-Wound Resistors
All alloys covered by these speci? The surface of the coating shall be smooth and uniform. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
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. To convert from inches to millimetres multiply by Values shown for other classes are for information only. The second covering shall be wrapped in the opposite direction from the? To convert from pounds to kilograms multiply by 0.
D in Diameter in. Alloy Class 1 3 4 5 6 Color purple yellow red pink ivory Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. The covering shall be sufficiently closely wrapped so that, when the wire is bent around a satm 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.