ASTM B388 thermostat bimetallic strip

Thermostat bimetal strip

A kind of precision alloy formed by two layers (or layers) of metals or alloys having different coefficients of thermal expansion as a component layer. A set of elementary layers in the thermal bimetal has a low coefficient of thermal expansion and is a passive layer; the other component layer has a high coefficient of thermal expansion and is an active layer. Sometimes, in order to obtain a special thermal bimetal, a third or fourth layer of metal or alloy may be added. Generally, the passive layer is made of Invar type alloy containing 34 to 50% of Ni; the active layer is made of brass, nickel, Fe-Ni-Cr, Fe-Ni-Mn and Mn-Ni-Cu alloy. Different types of thermal bimetals can be obtained by different combinations of active layer and passive layer materials, such as high temperature type, medium temperature type, low temperature type, high sensitivity type, corrosion resistant type, resistance type and quick action type.

PS：Strip thickness range：0.1～1.5mm; Strip width range：1.0～200mm

Strip size Tolerance range:

Thermal bimetallic elements stabilized heat treatment system:

Application:

Bimetallic strip: Bimetal is a composite material that is firmly bonded by two or more layers of alloys having different coefficients of linear expansion. An alloy layer with a large expansion coefficient is called an active layer, and an alloy layer with a small expansion coefficient is called a passive layer. An intermediate layer that acts as a regulating resistor can be added between the active layer and the passive layer. When the ambient temperature changes, the active layer Different from the expansion coefficient of the passive layer, bending or rotation occurs. This alloy is used in automatic control devices such as temperature control, temperature compensation, current limiting, temperature indication, and thermal sensors in instrumentation. It can also be applied to circuit breakers, switches, thermal relays, various temperature control components, home appliance protectors, electronic protectors, overload protectors, condensation traps, temperature regulators, thermometers, incubators, meteorological instruments, electric irons, Rice cooker, refrigerator, fire alarm, fluorescent starter, oven, lighter, current type automatic control switch, automatic safety protection switch strips, etc. It is also used for heat-sensitive components in medium and low voltage electrical appliances such as fluid (gas. liquid) valve switches.