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? Historical Version s – view previous versions of standard. The electrical resistance per unit length can be determined more accurately than the dimensions of very small wire. It shall be free from voids or bare spots and have a minimum of back twist.
If you feel that axtm 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 abstract is a brief summary of the referenced b67.
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.
It is the responsibility of the user of this standard to become familiar with all hazards including those identi?
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. This specification covers round wires and ribbons with controlled electrical properties made from magnetic and nonmagnetic class 1a alloys. B Alloy Classes 1a, 1b, 1c, 2a, 2b, 3a, 4, and 6 are designed to give asym low emf versus copper. No further reproductions authorized.
All of the information included in this note is based on measurements made in accordance with Test Method B The enamel shall not be underbaked so that one turn adheres to the next on a spool.
The surface of the coating shall be smooth and uniform. Caution should be exercised pending knowledge of the maximum temperature of use for the coating material involved.
The second covering shall be wrapped in the opposite direction from the? The test shall be made 2 to 10 min after removal of the wire from the oil, lightly wiping off the excess oil. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
The mean temperature coefficient of resistance referred to Copyright? To convert from inches to millimetres multiply by ast This is not valid in view of modern rolling equipment and practices, but still is widely used as a basis of description.
Alloy Class 1 3 4 xstm 6 Color purple yellow red pink ivory Values shown for other classes are for information only. Current edition approved May 1, Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
B — 07 Standard Speci? To convert from pounds to kilograms multiply by 0. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
ASTM-B | Standard Specification for Wire for Use In Wire-Wound Resistors | Document Center, Inc.
Last previous edition approved in as B — 90 Nominal Electrical Resistance per Unit Length 7. Maximum indicates the maximum deviation from zero and the plus or minus sign the polarity of the couple. A number in parentheses indicates the year of last reapproval.
Outside Diameter, max, in. Permissible Variations in Electrical Resistance ashm D in Diameter in. Atm 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.
The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. B adtm 07 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. A superscript epsilon e indicates an editorial change since the last revision or reapproval. 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.
Originally approved in Temperature Coefficient of Resistance 8. D If metric b2677 are desired, 1 in. The tension on the wire shall not exceed one half of its yield strength.
NOTE 1—When ribbon or? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM B267 – 07(2018), Standard Specification for Wire for Use In Wire-Wound Resistors
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. Link to Active This link will always route to the current Active version of the 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 own responsibility.
The nominal resistance per unit length for a round wire is calculated from the nominal resistivity and nominal cross-sectional area. C The maximum temperature values listed apply to the alloy wire only.
Wire larger in diameter than sizes listed in Table 6 may be supplied on spools Table 7 or in coils depending on aetm between the manufacturer and the purchaser.