Thermal Bimetal Strip TB1577A Lower Elastic Modulus For Automatic
Protection Switching With OEM Print Mark
A bimetallic strip is used to convert a temperature change into
mechanical displacement. The strip consists of two strips of
different metals which expand at different rates as they are
heated, usually steel and copper, or in some cases steel and brass.
The strips are joined together throughout their length by riveting,
brazing or welding. The different expansions force the flat strip
to bend one way if heated, and in the opposite direction if cooled
below its initial temperature. The metal with the higher
coefficient of thermal expansion is on the outer side of the curve
when the strip is heated and on the inner side when cooled
The sideways displacement of the strip is much larger than the
small lengthways expansion in either of the two metals. This effect
is used in a range of mechanical and electrical devices. In some
applications the bimetal strip is used in the flat form. In others,
it is wrapped into a coil for compactness. The greater length of
the coiled version gives improved sensitivity.
| Grade | 5J1580 |
| High expansion layer | Ni20Mn6 |
| Low expansion layer | Ni36 |
Description:
Chemical composition(%)
| Grade | C | Si | Mn | P | S | Ni | Cr | Cu | Fe |
| Ni36 | ≤0.05 | ≤0.3 | ≤0.6 | ≤0.02 | ≤0.02 | 35~37 | - | - | Bal. |
| Grade | C | Si | Mn | P | S | Ni | Cr | Cu | Fe |
| Ni20Mn6 | ≤0.05 | 0.15~0.3 | 5.5~6.5 | ≤0.02 | ≤0.02 | 19~21 | - | - | Bal. |
Physical properties
>Density (g/cm3): 8.1
> Allowable temperature (ºC): -70~ 350
Linear temperature (ºC): -20~ 180
>Electrical resistivity (μΩ*m): 0.8 ±5% (20ºC)
>Thermal conductivity ( W/m. ºC): 12
>Bending K / 10-6 ºC-1(20~135ºC): 15
> Elastic Modulus, E/GPa 147~177
Application: The material is mainly in automatic control devices
and instrumentation (eg: exhaust thermometers, thermostats, voltage
regulators, temperature relay, automatic protection switching,
diaphragm meters, etc.) make temperature control, temperature
compensation, current limit, temperature indicator and other
heat-sensitive components.
Feature: The basic characteristics of Thermostat Bimetallic is
bending deformation with temperature changes, resulting in a
certain moment.
Thermostat Bimetallic Strip expansion coefficient is different from
the two or more layers of metal or alloy along the entire contact
surface firmly bonded, having a temperature-dependent shape change
occurs thermosensitive functional composites. Wherein the higher
expansion coefficient of the active layer is a layer called a low
coefficient of expansion of the layer is named passive layer.
Overview
Thermal bimetal strip is by the different expansion coefficient of
two or more than two layers of metal or metal solid combination,
and along the entire interface varies with temperature and the
thermal function of shape changes in composite materials.One of
high expansion coefficient become active layer, low expansion
coefficient becomes passive.When requirements with high
resistivity, but heat sensitive resistance performance is
essentially the same type of thermal bimetal series, can be added
between the two layers of different thickness of middle layer as a
shunt layer, is to achieve the purpose of control different
resistivity.
The basic characteristic of the thermal bimetal is changing with
temperature and temperature deformation, resulting in a certain
moment.Many devices use this feature to convert heat energy into
mechanical work to achieve automatic control.Thermal bimetal used
for control system and temperature sensor in the measuring
instrument.
System of heat treatment: heat sensitive resistance, resistivity
and elastic modulus of samples before the measurement must undergo
heat treatment, to eliminate stress.
Main features: high heat sensitive properties and high resistivity,
but lower elastic modulus and allowed stress, can increase the
sensitivity of the instrument, smaller size and increase the
reaction
About us
Shanghai Tankii Alloy Material Co., Ltd. specialized in production of thermocouple wire, thermocouple cable, thermocouple connector, and
other thermocouple products.
Based on the principle of “first quality, sincere service”, our
managing ideology is pursuing technology innovation and creating
the top brand in the alloy field. We persist in Quality - the
foundation of the survival. It is our forever ideology to serve you
with full heart and soul. We committed to provide customers all
over the world with high-quality, competitive products and perfect
service.
Our products, such us nichrome wire, nichrome strip, fecral wire,
fecral strip, thermocouple wire, nickel wire, nickel strip have
been exported to Europe, USA, India, Southest Asia, South
America,etc.
We are willing to establish strong and long-time partnership with
our customers
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