ASTM B267 PDF

A number in parentheses indicates the year of last reapproval. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard. Referenced Documents2. Significance and Use3. Alloy Classes4. Nominal Electrical Resistance per Unit Length7.

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The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. Significance and Use This specification on nickel-chromium and nickel-chromium-iron alloys contains the requirements for chemistry, electrical resistance, mechanical properties, and packaging. Chemical Requirements The alloys shall conform to the requirements as to chemical composition prescribed in Table.

Samples for Chemical Analysis - Specimens for chemical analysis may be taken from either the melt or from a sample of finished wire that is representative of the lot. The lot size for detemining compliance with the requirements of this specification shall be one heat. Chemical Analysis - The chemical analysis shall be made in accordance with Test Methods A , or by other analytical method approved by the purchaser. Actual Chemical analysis is not required for routine acceptance.

Physical Requirements The material shall be thoroughly and uniformly annealed. Wire shall conform to the following elongation requirements Size.

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ASTM B267 - 07(2018), Standard Specification for Wire for Use In Wire-Wound Resistors

Taujora Caution should be exercised pending knowledge of the maximum temperature of use for the coating material involved. B — 07 Standard Speci? To convert from inches to millimetres multiply by Values shown for other classes are for information only. A number in parentheses indicates the year of last reapproval. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. 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. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

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More B 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. 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. The nominal resistance per unit length for a round wire is calculated from the nominal resistivity and nominal cross-sectional area.

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ASTM B267 - 07(2018)

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