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 surface of the coating shall be smooth and uniform. B — 07 ASTM International takes no position respecting b26 validity of any patent rights asserted in connection with any item mentioned in this standard. All of the information asttm in this note is based on measurements made in accordance with Test Method B Permissible Variations in Dimensions This abstract is a brief summary of the referenced standard.
C The maximum temperature values listed apply to the alloy wire only.
Last previous edition approved in as B — 90 The enamel shall not be underbaked so that one turn adheres to the next on a spool. Historical Wstm s – view previous versions of standard.
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. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
The electrical resistance per unit length can be determined more accurately than the dimensions of very small wire. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but asfm not provided as part of the standard.
NOTE asgm ribbon or? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. 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.
The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
This specification covers round wires and ribbons with controlled electrical properties made from magnetic and nonmagnetic class 1a alloys. The second covering shall be wrapped in the opposite direction from the? The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. It is the responsibility of the user of this standard to become familiar with all hazards including those identi? Permissible Variations in Electrical Resistance All alloys covered by these speci? D If metric sizes are desired, 1 in.
The test shall be made 2 to 10 min after removal of the wire from the oil, lightly wiping off the excess oil. 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 is not valid in view of modern rolling equipment and practices, but still is widely used as a basis of description. 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.
B Alloy Classes 1a, 1b, 1c, 2a, 2b, 3a, 4, and 6 are designed to give a low emf versus copper. 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.
B — 07 Standard Speci? Users of b2677 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. 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.
ASTM B – 07() Standard Specification for Wire for Use In Wire-Wound Resistors
Current edition approved May 1, 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 zstm in this specification.
The nominal resistance per unit length for a round wire is calculated from the nominal resistivity and nominal cross-sectional area. To convert from inches to millimetres multiply by D in Diameter in.
A number in parentheses indicates the year of last reapproval.
ASTM-B | Standard Specification for Wire for Use In Wire-Wound Resistors | Document Center, Inc.
No further reproductions authorized. Outside Diameter, max, in. The tension on the wire shall not exceed one half of b27 yield strength. Values shown for other classes are for information only.
It shall be free from voids or bare spots and have a minimum of back twist.
ASTM B267 – 07(2018), Standard Specification for Wire for Use In Wire-Wound Resistors
Nominal Electrical Resistance per Unit Length 7. It shall include both single and double coverings. Ribbon actually is made to a speci? This slope is determined from the following equation: The mean temperature coefficient of resistance referred to Copyright? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Originally approved in To convert from pounds to kilograms multiply by 0.
Alloy Class 1 3 4 5 6 Color purple yellow red pink ivory Caution should be exercised pending knowledge of the maximum temperature of use for the coating b2667 involved. Link to Active This link will always route to the current Active version of the standard.