Sandvik Kanthal 127 R 09 Thermostatic bimetal

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Sandvik Kanthal 127 R 09 Thermostatic bimetal
Categories:	Metal; Superalloy; Iron Base
Material Notes:	KANTHAL 127 R 09 is a thermostatic bimetal which is recommended for use in the temperature range -20 to +350°C. In extreme cases it can be used at temperatures up to a maximum of +400°C. Typical applications for KANTHAL 127 R 09 are in circuit breakers, motor protection units, thermostats, shower mixers, etc. High-expansive component: 15-7 Alloy(440 Designation, 34.8% of thickness) Low-expansive component: Invar 127 Alloy (330 Designation, 46.1% of thickness) Intermediate component: Copper (470 Designation, 19.1% of thickness) Information provided by Sandvik Composition: High-expansive component: Designation 440; 6.9% Mn; 17% Ni; 76.1% Fe Low-expansive component: Designation 330; 0.4% Mn; 40.7% Ni; Bal. Fe
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Physical Properties	Metric	English	Comments

Density	8.20 g/cc	0.296 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Vickers	130	130	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	460 MPa	66700 psi	Low-expansive component
	550 MPa	79800 psi	High-expansive component
Tensile Strength, Yield	240 MPa	34800 psi	High-expansive component
	260 MPa	37700 psi	Low-expansive component
Elongation at Break	40 %	40 %	High-expansive component
	40 %	40 %	Low-expansive component
Modulus of Elasticity	170 GPa	24700 ksi

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00000850 ohm-cm @Temperature 0.000 °C	0.00000850 ohm-cm @Temperature 32.0 °F	Bimetal
	0.0000120 ohm-cm @Temperature 200 °C	0.0000120 ohm-cm @Temperature 392 °F	Bimetal
	0.0000160 ohm-cm @Temperature 400 °C	0.0000160 ohm-cm @Temperature 752 °F	Bimetal

Thermal Properties	Metric	English	Comments
CTE, linear	3.81 µm/m-°C @Temperature 30.0 - 130 °C	2.12 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	0.460 J/g-°C @Temperature 20.0 °C	0.110 BTU/lb-°F @Temperature 68.0 °F
Thermal Conductivity	88.0 W/m-K @Temperature 20.0 °C	611 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 325
linearity Temperature Range, °C	-20 to 350
Specific thermal curvature, /K	0.000025
Specific deflection, /K	0.0000134

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NSANDV128 / 19022

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