EtchMetᵀᴹ TM20 (C17200) Strip

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Description

EtchMet alloy is a material that is tailor made for the springs in voice coil motors and optical image stabilization systems common in smart phone cameras. These devices have a relatively large mass (lense) suspended by extremely small, thin springs. The small size of the springs requires very high strength material to withstand shock loads when the phone is dropped or deliberately tapped against an NFC reader. Therefore, the springs must be made from a very robust material. Furthermore, the lack of a damping mechanism makes high spring stiffness important to combat vibration. EtchMet alloy provides a number of advantages that make it the ideal material for this application:


  • It has a uniform elastic modulus across all thicknesses/diameters and from product form to product form. This provides consistent stiffness and damping behavior which makes spring calculations easy.
  • It has a very high resilience allowing it to withstand impact loads without fracturing or permanently deforming.
  • It has high fatigue strength to withstand many drops and actuation cycles.
  • It has a uniform, primarily single-phase microstructure, which photochemically machines easily and cleanly for uniform edges free of stress risers.
  • It is supplied fully precipitation hardened so no further heat treatment is required.
  • It solders and welds readily.
  • EtchMet strip is inherently flat with minimal coil set, which helps with alignment during photochemical machining.
  • Los datos sobre este material han sido proporcionados por Materion Brush GmbH.

    A menos que se indique lo contrario, todas las medidas corresponden a condiciones de temperatura ambiente. A menos que se indique lo contrario, se utilizan las unidades del SI.
    Las normas armonizadas son similares a uno o varios estándares del proveedor. Es posible que algunas normas armonizadas se ajusten al estándar original, mientras que otras pueden quedar fuera de su alcance.

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    Propiedades

    General

    PropertyTemperatureValue

    Densidad

    23.0 °C

    8.36 g/cm³

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    Medidas

    PropertyValue

    Ancho

    1.27 - 406.5 mm

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    Espesor

    0.03 - 0.05 mm

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    Mecánica

    PropertyTemperatureValueComment

    Dureza Vickers

    23.0 °C

    375 [-]

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    min.

    Elongación

    23.0 °C

    1 %

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    min.

    Límite elástico Rp 0,2

    23.0 °C

    1344 MPa

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    min.

    Módulo elástico

    23.0 °C

    131 GPa

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    Resistencia a la tracción

    23.0 °C

    1379 MPa

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    min.

    Aplicaciones térmicas

    PropertyTemperatureValue

    Coeficiente de dilatación térmica

    23.0 °C

    1.75E-5 1/K

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    Conductividad térmica

    23.0 °C

    105 W/(m·K)

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    Eléctrico

    PropertyTemperatureValue

    Resistividad eléctrica

    23.0 °C

    6.2E-6 - 1.01E-5 Ω·m

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    Specific Electrical conductivity

    17 - 28 % IACS

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    Magnético

    PropertyTemperatureValueComment

    Permeabilidad magnética relativa

    23.0 °C

    1 [-]

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    max.

    Technological properties

    Property
    Application areas

    EtchMet alloy is a material that is tailor made for the springs in voice coil motors and optical image stabilization systems common in smart phone cameras.