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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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.
B — 07 Standard Speci?
Historical Version s – view previous versions of standard. This abstract is a brief summary of the referenced standard.
Originally approved in Wire larger in diameter than sizes listed in Table 6 may be supplied asm spools Table 7 or in coils depending on agreement between the manufacturer and the purchaser. It shall include both single and double coverings.
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 awtm not open enough to make the wire underneath visible to the unaided v267.
Users of this asym 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.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Alloy Class 1 3 4 5 6 Color purple yellow red pink ivory C The maximum temperature values listed apply to the alloy wire only.
ASTM B267 – 07(2018), Standard Specification for Wire for Use In Wire-Wound Resistors
Caution should be exercised pending knowledge of the maximum temperature of use for the coating material involved. A number in parentheses indicates the year of last reapproval.
All of the information included astk this note is based on measurements made in accordance with Test Method B B Alloy Classes 1a, 1b, 1c, 2a, 2b, 3a, 4, and 6 are designed to give a low emf versus copper. 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.
B — 07 ASTM International takes no position respecting the validity of any patent rights 2b67 in connection with any item mentioned in this standard. 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 electrical resistance per unit length can be determined more accurately than the dimensions of very small wire.
Ribbon actually is made to a speci? NOTE 1—When ribbon or?
ASTM B – 07() Standard Specification for Wire for Use In Wire-Wound Resistors
Values shown for other classes are for information only. Last previous edition approved in as B — 90 No further reproductions authorized. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefax v267, or service astm.
Temperature Coefficient of Resistance 8.
The tension on the wire shall not exceed one half of its yield strength. This v267 is determined from the following equation: Link wstm Active This link will asm route to the current Active version of the standard. 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.
Permissible Variations in Electrical Resistance 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. It is the responsibility of the user of this standard to become familiar with all hazards asfm those identi?
Nominal Electrical Resistance per Aastm Length 7. The surface of the coating shall be smooth and uniform. D If metric sizes are desired, 1 in. The mean temperature coefficient of resistance referred to Copyright? This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
The nominal resistance per unit length for a round wire is calculated from the nominal resistivity and nominal cross-sectional area. Current edition approved May 1, The test shall be made 2 to 10 min after removal of the wire from the oil, lightly wiping off the excess oil. A superscript epsilon e indicates an editorial change since the last revision or reapproval. The enamel shall not be underbaked so that one turn adheres to the next on a spool.
The wires and ribbons, which may have insulated coverings or enamel coatings, are recommended for use in wire-wound resistance aastm like precision resistors and other similar applications, but not for use as electrical heating elements.
To convert from inches to millimetres multiply by