Sandvik Kanthal 135 R 05 Thermostatic bimetal

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Sandvik Kanthal 135 R 05 Thermostatic bimetal
Categories:	Metal; Superalloy; Iron Base
Material Notes:	KANTHAL 135 R 05 is a thermostatic bimetal which is recommended for use in the temperature range -20 to +250°C. In extreme cases it can be used at temperatures up to a maximum of +400°C. Typical applications for KANTHAL 135 R 05 are in circuit breakers, motor protection units, ammeters etc. High-expansive component: 15-7 Alloy(440 Designation, 25.3% of thickness) Low-expansive component: Invar 145 Alloy (430 Designation, 44.7% of thickness) Intermediate component: Copper (470 Designation, 30% of thickness) Information provided by Sandvik Composition: High-expansive component: Designation 440; 6.9% Mn; 17% Ni; 76.1% Fe Low-expansive component: Designation 430; 0.3% Mn; 36.5% Ni; Bal. Fe
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Physical Properties	Original Value	Comments

Density	8.40 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Vickers	120	Low-expansive component
	140	High-expansive component
	210	Low-expansive component, Cold-worked 20%
	260	High-expansive component, Cold-worked 20%
Tensile Strength, Ultimate	450 MPa	Low-expansive component
	550 MPa	High-expansive component
Tensile Strength, Yield	240 MPa	High-expansive component
	270 MPa	Low-expansive component
Elongation at Break	40 %	High-expansive component
	40 %	Low-expansive component
Modulus of Elasticity	165 GPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.00000570 ohm-cm @Temperature 0.000 °C	Bimetal
	0.00000960 ohm-cm @Temperature 200 °C	Bimetal
	0.0000122 ohm-cm @Temperature 300 °C	Bimetal

Thermal Properties	Original Value	Comments
CTE, linear	1.90 µm/m-°C @Temperature 30.0 - 130 °C
	20.2 µm/m-°C @Temperature 30.0 - 130 °C	High-expansive component
Specific Heat Capacity	0.460 J/g-°C @Temperature 20.0 °C
Thermal Conductivity	114 W/m-K @Temperature 20.0 °C
Maximum Service Temperature, Air	400 °C
Minimum Service Temperature, Air	-20.0 °C

Descriptive Properties
Linearity Range, °C	-20 to 200
linearity Temperature Range, °C	-20 to 250
Specific thermal curvature, /K	0.0000266
Specific deflection, /K	0.0000142

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