Sandvik Kanthal 145 R 10 Thermostatic bimetal

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Sandvik Kanthal 145 R 10 Thermostatic bimetal
Categories:	Metal; Superalloy; Iron Base
Material Notes:	KANTHAL 145 R 10 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 145 R 10 are in circuit breakers, motor protection units, ammeters etc. High-expansive component: 15-7 Alloy(440 Designation, 42.1% of thickness) Low-expansive component: Invar 145 Alloy (430 Designation, 42.7% of thickness) Intermediate component: Copper (470 Designation, 15.2% 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	Metric	English	Comments

Density	8.30 g/cc	0.300 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Vickers	120	120	Low-expansive component
	140	140	High-expansive component
	210	210	Low-expansive component, Cold-worked 20%
	260	260	High-expansive component, Cold-worked 20%
Tensile Strength, Ultimate	450 MPa	65300 psi	Low-expansive component
	550 MPa	79800 psi	High-expansive component
Tensile Strength, Yield	240 MPa	34800 psi	High-expansive component
	270 MPa	39200 psi	Low-expansive component
Elongation at Break	40 %	40 %	High-expansive component
	40 %	40 %	Low-expansive component
Modulus of Elasticity	165 GPa	23900 ksi

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.0000107 ohm-cm @Temperature 0.000 °C	0.0000107 ohm-cm @Temperature 32.0 °F	Bimetal
	0.0000160 ohm-cm @Temperature 200 °C	0.0000160 ohm-cm @Temperature 392 °F	Bimetal
	0.0000190 ohm-cm @Temperature 300 °C	0.0000190 ohm-cm @Temperature 572 °F	Bimetal

Thermal Properties	Metric	English	Comments
CTE, linear	1.90 µm/m-°C @Temperature 30.0 - 130 °C	1.06 µin/in-°F @Temperature 86.0 - 266 °F
	20.2 µm/m-°C @Temperature 30.0 - 130 °C	11.2 µin/in-°F @Temperature 86.0 - 266 °F	High-expansive component
Specific Heat Capacity	0.440 J/g-°C @Temperature 20.0 °C	0.105 BTU/lb-°F @Temperature 68.0 °F
Thermal Conductivity	70.0 W/m-K @Temperature 20.0 °C	486 BTU-in/hr-ft²-°F @Temperature 68.0 °F
Maximum Service Temperature, Air	400 °C	752 °F
Minimum Service Temperature, Air	-20.0 °C	-4.00 °F

Descriptive Properties
Linearity Range, °C	-20 to 200
linearity Temperature Range, °C	-20 to 250
Specific thermal curvature, /K	0.0000278
Specific deflection, /K	0.000015

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NSANDV114 / 19008

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