Titanium Alloy Grade 4

  • Titanium Alloy Grade 4
  • General Characteristics

    Grade 4 combines the excellent resistance to corrosion and corrosion fatigue of titanium with high strength that makes it a candidate to compete with steels and nickel alloys for many chemical and marine applications. It could be considered in any application where strength and corrosion resistance are important. Grade 4 also has good ductility, is moderately formable, and has superior corrosion fatigue resistance in seawater. Applicable service temperatures for CP Ti Grade 4 are up to 204ºC (400ºF). Some applications have included airframe and aircraft engine components, marine and chemical processing machinery, heat exchangers, reaction vessels for chemical processing and desalinization plants, corrosive waste disposal wells and pulp and paper production.

  • Typical Chemical Composition

    Weight % C H Fe N O Ti
    minimum Bal.
    maximum 0.10 0.015 0.50 0.050 0.40
  • Physical Properties

    Characteristics English Metric
    Nominal density 25°C   /   78°F 0.163 lbs/in3 4.51 g/cm3
    Melting point 3020 °F 1660 °C
    Specific heat 25°C   /   78°F 0.127 BTU/lb- °F 530 J/Kg- °K
    Coefficient of thermal

    expansion From 20°C to temperature

    100°C /  212°F 4.78 µin/in- °F 8.60 µm/m- °K
    315°C /  599°F 5.11 µin/in- °F 9.20 µm/m- °K
    540°C /1000°F 5.39 µin/in- °F 9.70 µm/m- °K
    Thermal conductivity 100-300°C

    (212-572°F)

    9.95 BTU/ft- hr – °F 17.2 W/m – °K
    Electrical resistivity 25°C   /   78°F 600 nΩ · m
  • Mechanical Properties

    Treatment Tensile Hardness
    Ultimate Yield Elongation at break Reduction of area Rockwell B
    KSI MPa KSI MPa % %
    Typical 79.8 550 69.6-80.1 480-552 15.0 30.0 100
  • Specifications

    • AMS – 4901
    • ASTM – B265,
    • F67 (surgical implants)

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