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Thermostatic bimetal strip 5j1480

Thermostatic bimetal strip 5j1480

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.
 
shop sign    5j1480
With brand    5j18
Composite layer
alloybrand    High expansion layer    Ni22Cr3
    middle layer    --------
    Low expansion layer    Ni36

Chemical composition
shop sign    Ni    Cr    Fe    Co    Cu    Zn    Mn    Si    C    S    P
                                    ≤
Ni36    35.0~37.0    -    allowance    -    -    -    ≤0.6    ≤0.3    0.05    0.02    0.02
Ni22Cr3     21.0~23.0    2.0~4.0    allowance    -    -    -    0.3~0.6    0.15~0.3    0.25~0.35    0.02    0.02

performance
Than bending K(20~135ºC)    Temperature curvature
F/(greenhouse ~ 130 ºC)     resistivity    Linear temperature
/ ºC    Allows the use of temperature / ºC    Density (g/cm after)
Nominal value    Allowable deviation        Standard values    Allowable deviation            
    Level 1    Level  2                        
14.3    ±5%    ±7%    26.2%±5%    0.8    ±5%    -20~180    -70~350    8.2
 
Modulus of elasticity
E/GPa    Hardness (HV)    Tensile strength
MPa    Allow stress MPa
    High expansion layer    Low expansion layer         minimum    biggest
147~177    270~340    200~255    785~883    196    343
 
production process
Cold rolled →go oil → pickling → annealing cold-rolled →oil → pickling → annealing cold-rolled → conform to the requirements of the use of thermal bimetal strip

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