ASTM B389 - 81(2008)

    Standard Test Method for Thermal Deflection Rate of Spiral and Helical Coils of Thermostat Metal

    Active Standard ASTM B389 | Developed by Subcommittee: B02.10

    Book of Standards Volume: 02.04


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    Significance and Use

    This test method simulates, to a practical degree, the operation of the thermostat metal coil.

    The thermal deflection properties of a coil may vary from lot-to-lot of thermostat metal material. This method is useful for determining the optimum thickness and length of the material for a given deflection specification.

    This method is useful as a quality test to determine acceptance or rejection of a lot of thermostat metal coils.

    1. Scope

    1.1 This test method covers the determination of the thermal deflection rate of spiral and helical coils of thermostat metal.

    1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

    1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    E77 Test Method for Inspection and Verification of Thermometers


    ICS Code

    ICS Number Code 21.160 (Springs)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/B0389-81R08

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