industrial centrifugal fansOne of the most important part in an industrial fan is blade. The extreme conditions in an industry may affect the blades of a fan. These extreme conditions may not be same in all industries. So, fan blades must be made of different kind of material based on the industrial use.

  • Aluminum alloy(EN AC-Al Si12Cu1(Fe)(Al))
    • This alloy has a temperature range of -60oC to +245o
    • This alloy has an maximum tensile strength of 240MPa
    • Yield stress of this material has an offset, so it has proof stress which has a value of 140MPa
    • The hardness of a material is given by the Brinell hardness number, which is 40 and can take a load of 500Kgs.
  • Glass reinforced Polyamide(PAG)
    • This can with stand temperatures of up to -40oC to +120o
    • Mechanical properties at dry as molded
      • It has a tensile strength of 165MPa.
      • This material has an impact strength at different temperatures
        • At 23oC: 11KJ/m2
        • At -30oC: 9KJ/m2
      • It has a tensile modulus of 8.2 GPa
    • Mechanical properties at 50% relative humidity
      • Tensile strength of 100 MPa
      • Impact strength at different temperatures
        • At 23oC: 17KJ/m2
        • At -30oC: 9KJ/m2
        • The Young’s modulus of the material is 5.6GPa.
      • Anti-Static Glass Reinforced Polyamide(PAGAS)
        • This materials can sustain in temperature range of -40oCto +110oC
        • The tensile strength of the material is 85MPa
        • The material is tested for impact strength at three different temperatures.
          • At 23oC: 10KJ/m2
          • At 0oC: 8.5KJ/m2
          • At -40oC: 6GPa
        • The flexural modulus of the material is 6 Gpa.
  • Glass reinforced polyamide industrial quality(PAGI)
    • This material has a temperature range of -40oCto +110o
    • Mechanical properties at dry molded
      • It has a tensile strength of 145GPa
      • Impact strength
        • At 23oC: 9KJ/m2
        • At -30oC: 6KJ/m2
      • It has an Young’s modulus of 7.56GPa
    • Mechanical properties at 50% relative humidity
      • It has a tensile strength of 84MPa
      • Impact strengths of
        • AT 23oC: 14KJ/m2
        • AT -30oC: 6KJ/m2
      • It has an Young’s modulus of 5GPa
    • Vibration stabilized glass reinforced polyamide(PAGST)
      • This material has a temperature range of -40oC to +110oC
      • Mechanical properties of the material at dry molded
        • It has a tensile strength of 100MPa
        • Impact strength
          • At 23oC: 14KJ/m2
          • At -30oC: 6.5KJ/m2
        • Young’s modulus is 5.1 Gpa.
      • Mechanical properties at 50% relative humidity
        • It has a tensile strength of 66MPa
        • Impact strength
          • At 23oC: 19.6KJ/m2
          • At -30oC: 7.4KJ/m2
        • Young’s modulus of 3.4GPa
      • Glass-reinforced polypropylene(PPG)
        • It has a temperature range of -10oC to +90oC
        • Mechanical Properties of the material
          • Tensile strength of 85MPa
          • Impact strength
            • At 23oC: 10KJ/m2
            • At 0oC: 8.5KJ/m2
            • At -40oc: 7KJ/m2
          • Flexural modulus of the material is 6GPa

An appropriate material is used based on the requirement of industrial environment. The working life of a fan will be determined by the material of the fan blade.