BL2 Thermostatic Bimetal alloy strip

China BL2 Thermostatic Bimetal alloy strip, Find details about China BL2, Thermostatic Bimetal alloy strip from BL2 Thermostatic Bimetal alloy strip

Basic Info.

Model NO.

BL2

density

8.1

Allows the use of temperature

-70~350

Linear temperature

-20~200

Temperature curvature

28.5%±5%

Modulus of elasticity

147000

use

Machine tool electrical appliances

features

High thermal sensitivity

material

Ni20Mn6 Ni36

Trademark

tankii

Transport Package

Wooden Case

Specification

negotiable

Origin

China

HS Code

7408229000

Model NO.

BL2

density

8.1

Allows the use of temperature

-70~350

Linear temperature

-20~200

Temperature curvature

28.5%±5%

Modulus of elasticity

147000

use

Machine tool electrical appliances

features

High thermal sensitivity

material

Ni20Mn6 Ni36

Trademark

tankii

Transport Package

Wooden Case

Specification

negotiable

Origin

China

HS Code

7408229000

Product Desciption

BL2 Thermostatic Bimetal alloy strip

Product Description

(Common Name: Kanthal 155)

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.

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.

Composition

Grade	ASTM TM29
High expansion layer	Ni20Mn6
Low expansion layer	Ni36

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.

Typical Physical properties

Density (g/cm3)	8.1
Electrical resistivity at 20ºC(OMmm²/m)	0.8±5%
Thermal conductivity, λ/ W/(m*ºC)	12
Elastic Modulus, E/ Gpa	147~177
Bending K / 10^-6 ºC^-1(20~135ºC)	15
Temperature bending rate F/(20~130ºC)10^-6ºC^-1	28.5%±5%
Allowable temperature (ºC)	-70~ 350
Linear temperature (ºC)	-20~ 180

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.

BL2 Thermostatic Bimetal alloy strip