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Stainless Steel - Grade 303Cu / 1.4570

Description

Grade 303Cu/1.4570 is an austenitic chromium-nickel stainless steel that includes copper to enhance machinability and corrosion resistance. This grade is recognized for its excellent machinability, making it suitable for various applications where high-speed machining is required. The addition of copper improves the material's performance in high-temperature environments while maintaining good mechanical properties.

Chemical Composition

The typical chemical composition of 303Cu is as follows (in weight %):

  • Carbon (C): ≤ 0.15
  • Silicon (Si): ≤ 1.00
  • Manganese (Mn): ≤ 2.00
  • Phosphorus (P): ≤ 0.15
  • Sulfur (S): ≥ 0.10
  • Nickel (Ni): 8.00 - 10.00
  • Chromium (Cr):17.00 - 19.00
  • Copper (Cu): 1.50 - 3.50
  • Molybdenum (Mo):≤ 0.60

    • Mechanical Properties

    The mechanical properties of 303Cu are as follows:

  • Yield Strength (Rp0.2): 334 MPa (minimum)
  • Tensile Strength (Rm): 471 MPa (minimum)
  • Elongation (A): 21% (minimum)
  • Reduction of Area (Z): 12% (minimum)
  • Hardness (HBW): 134

    • Thermal & Physical Properties

  • Density: 7.93 g/cm³
  • Thermal Conductivity: 23 W/m•K
  • Specific Heat: 500 J/kg•K
  • Electric Resistance: 42 µΩ•cm

    • Other Designations

  • DIN Number: 1.4570
  • UNS: S30330
  • AISI: 303Cu
  • SUS:303Cu

    • Fabrication and Heat Treatment

    303Cu is not hard enable by heat treatment, making it suitable for various fabrication processes such as:

  • Hot and Cold Working: Suitable for forging, rolling, and machining.
  • Welding: Can be welded using standard methods for austenitic stainless steels.
  • Heat Treatment: Typically, solution treatment is performed at temperatures around 1010-1120°C, followed by rapid cooling.

    • Applications

    303Cu is utilized in various applications, including:

  • Valve bodies and trim
  • Fasteners and fittings
  • Mechanical parts requiring corrosion resistance
  • Chemical processing equipment

    • Supplied Forms

    303Cu is available in various forms, including:

  • Round bars
  • Flat bars

    • Features

  • Excellent machinability
  • Good corrosion resistance
  • Non-magnetic in the annealed condition
  • Suitable for high-temperature applications

    • This datasheet provides a comprehensive overview of the 303Cu grade, highlighting its properties, applications, and specifications.

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