ASTM B106-08(2013)

Standard Test Methods for Flexivity of Thermostat Metals

SIGNIFICANCE AND USE
4.1 These test methods are used for determining response to temperature change or flexivity of thermostat metal. The flexivity is calculated from the temperatures, dimensions of specimen, and the relative movement of the specimen. The simple beam method (Method A) is the method for certification. Any use of the spiral coil method (Method B) is to be mutually agreed upon between the user and supplier.
SCOPE
1.1 These test methods cover the determination of flexivity (a measure of thermal deflection rate or deflection temperature characteristics) of thermostat metals.  
1.1.1 Test Method A—Tested in the form of flat strip 0.015 in. (0.38 mm) or over in thickness.  
1.1.2 Test Method B—Tested in the form of spiral coils less than 0.012 in. in thickness.  
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.

General Information

• Status: Historical
• Publication Date: 31-Jul-2013
• ICS: 77.040.10 - Mechanical testing of metals
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.10 - Thermostat Metals and Electrical Resistance Heating Materials

Relations

• Replaces: ASTM B106-08 - Standard Test Methods for Flexivity of Thermostat Metals
• Effective Date: 01-Aug-2013
• Replaced By: ASTM B106-08(2019) - Standard Test Methods for Flexivity of Thermostat Metals
• Effective Date: 01-Nov-2019
• Referred By: ASTM B388-06(2018) - Standard Specification for Thermostat Metal Sheet and Strip
• Effective Date: 01-Aug-2013

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B106 − 08 (Reapproved 2013)
Standard Test Methods for
1
Flexivity of Thermostat Metals
This standard is issued under the fixed designation B106; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.2 flexivity (F), n—the change of curvature of the longi-
tudinalcenterlineofthespecimenperunittemperaturechange
1.1 These test methods cover the determination of flexivity
for unit thickness, given by the following equation:
(a measure of thermal deflection rate or deflection temperature
characteristics) of thermostat metals. 1/R 2 1/R
~ ! ~ !
2 1
F 5 t (1)
1.1.1 Test Method A—Tested in the form of flat strip T 2 T
2 1
0.015 in. (0.38 mm) or over in thickness.
To determine the flexivity between any two temperatures,
1.1.2 Test Method B—Tested in the form of spiral coils less
T and T , it is necessary to measure the curvature 1/R and
1 2 1
than 0.012 in. in thickness.
1/R at temperature T and T , respectively. To find the cur-
2 1 2
1.2 The values stated in inch-pound units are to be regarded
vature at either temperature (Fig. 1 and Fig. 2), measure the
as standard. The values given in parentheses are mathematical
distance D. The curvature is given by the following equa-
conversions to SI units that are provided for information only
tion:
and are not considered standard.
2 2
1/R 5 8D/ Q 14Dt14D (2)
~ !
1.3 This standard does not purport to address all of the
where:
safety concerns, if any, associated with its use. It is the
R = radius of curvature of the longitudinal center line of the
responsibility of the user of this standard to become familiar
specimen, in. (mm),
with all hazards including those identified in the appropriate
t = thickness of test specimen, in. (mm),
Material Safety Data Sheet (MSDS) for this product/material
Q = distance between support points, in. (mm), and
as provided by the manufacturer, to establish appropriate
D = for point support (simply supported beam),=perpen-
safety and health practices, and determine the applicability of
dicular distance between the longitudinal center lines of
regulatory limitations prior to use.
the lower surface of the specimen midway between the
point supports and the straight line joining the support
2. Referenced Documents
points, in. (mm).
2
2.1 ASTM Standards:
B389TestMethodforThermalDeflectionRateofSpiraland
4. Significance and Use
Helical Coils of Thermostat Metal
4.1 Thesetestmethodsareusedfordeterminingresponseto
temperature change or flexivity of thermostat metal. The
3. Terminology
flexivity is calculated from the temperatures, dimensions of
3.1 Definitions:
specimen, and the relative movement of the specimen. The
3.1.1 thermostat metal, n—a composite material in the form
simple beam method (Method A) is the method for certifica-
of sheet or strip comprising two or more metallic layers of
tion. Any use of the spiral coil method (Method B) is to be
differingcoefficientsofthermalexpansion,suchthattheradius
mutually agreed upon between the user and supplier.
of curvature of the composite changes with temperature
TEST METHOD A—FLAT STRIPS
change.
5. Apparatus
1
These test methods are under the jurisdiction of ASTM Committee B02 on
5.1 Specimen Carrier, provided with two conical supports
Nonferrous Metals and Alloys and are the direct responsibility of Subcommittee
for locating the specimen. The test length (that is, the distance
B02.10 on Thermostat Metals and Electrical Resistance Heating Materials.
between the point of contact of the specimen with one support
Current edition approved Aug. 1, 2013. Published August 2013. Originally
andthepointofcontactofthespecimenwiththeothersupport)
approved in 1984. Last previous edition approved in 2008 as B106–08. DOI:
10.1520/B0106-08R13.
shallbeknowntowithin 60.005in.(0.13mm),andthelineof
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
plane passing through the points of contact shall be horizontal.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
The specimen carrier and supports shall hold the specimen
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. without constraint so that the curvature, due to its deflection,
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B106 − 08 (2013)
thepointsofsupportandalongtheverticallineintersectingthe
line joining the points of support. Such means may comprise a
transmissionroddisposedwithitsaxisverticalandterminating
in a point or knife-edge, w
...