ASTM TM7 bimetallic coil for temperature controller bimetal thermostat

Product Overview

Description

ASTM TM7 bimetallic coil

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.

Chemical composition

shop sign	Ni	Cr	Fe	Al	Cu	Zn	Mn	Si	C	S	P
									≤
Ni36	35.0~37.0	-	Bal	-	-	-	≤0.6	≤0.3	0.05	0.02	0.02
Ni14Mn9.5Al5	13.0~15.0	-	Bal	4.3~5.6	-	-	8.5~10.0	-	0.02	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
13.7	±5%	±7%	26.1%±5%	0.93	±5%	-20~150	-70~370	7.75

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