The thermostatic bimetal 5J20110 is a composite material made of two metal alloys with different thermal expansion coefficients. It is firmly combined with a high expansion layer and a low expansion layer, and the material is bent through the differential expansion when the temperature changes. It is used in various temperature control fields, especially suitable for making thermal components and temperature compensators.
thermostatic bimetal 5J20110
chemical composition
5 J20110 consists of the following two layers:
-high expansion layer (usually Mn75Ni15Cu10 or Mn72Ni10Cu18):
-Manganese (Mn):72-75%
-Nickel (Ni):10-15%
-Copper (Cu):10-18%
-Low expansion layer (generally Ni36):
-Nickel (Ni):35-37%
-Iron (Fe): balance
physical properties
-density: approx. 8.8 g/cm & sup3;
-specific heat capacity: 0.1 cal/g · °C, usually measured at 25°C
-Thermal conductivity: 18 W/m · K (at 20°C)
-Coefficient of thermal expansion:
-high-expansion layer: 20 x 10 +/°C
-low-expansion layer: 4 x 10 +/°C
-Magnetic: The low-expansion layer material is usually non-magnetic, and the high-expansion layer is less magnetic.
electrical properties
-Resistivity: about 113 μΩ · cm (at 20±5 ℃), allowable deviation ± 5%
-temperature coefficient of resistance: positive temperature coefficient, as the temperature increases, the resistance increases.
-conductivity: approx. 1.8 x 10 + S/m
mechanical properties
-Modulus of elasticity: 113 GPa at room temperature
-Tensile strength: usually between 450-600 MPa (depending on the processing method and material thickness)
-Ductility: Good, suitable for rolling and processing into strip or sheet.
-Fatigue resistance: excellent, suitable for use in repeated temperature cycles.
Features and Benefits
-High heat sensitivity: The material has a significant expansion difference under temperature changes, which can accurately control the temperature.
-Stability: Long-term use in the temperature range of 200-400°C, maintaining high stability.
-High resistivity: Suitable for making small resistive elements that provide effective temperature control in space-constrained conditions.
-diamagnetic: Due to the use of non-magnetic materials in the low-expansion layer, the overall material is non-magnetic or extremely weakly magnetic, which is very suitable for electric vacuum and sensitive electronic equipment.
Application areas
-temperature controller: in household appliances (such as electric iron, electric oven), industrial electrical equipment as a temperature sensing and control components.
-temperature compensator: widely used in precision machinery, power electronic equipment and measuring instruments to compensate for temperature changes.
-Resistance element: Suitable for making various resistance elements, such as thermistors, adjustable resistors, etc.
-Gyroscope and electric vacuum devices: In these precision equipment, 5J20110 is used as a non-magnetic, thermally stable material to ensure that the equipment can still work normally under temperature changes.
Supply Specifications
-strip thickness: 0.1 mm-3.0mm
-strip width: 5mm - 100mm
-Customized specifications: The thickness and width can be customized according to customer needs.
-Supply status: usually provided in roll or sheet form, which is convenient for processing into small components.
use precautions
-Operating temperature: It is recommended to use below 200°C to ensure long-term stability of material properties.
-Avoid strong magnetic field environment: Under a strong magnetic field, the thermal sensitivity of the material may be affected and the temperature control accuracy may be reduced.
-Anti-oxidation treatment: When used for a long time at a higher temperature (above 400 ℃), the surface can be properly anti-oxidation treatment to extend the service life.
