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Stainless Steel - Grade 430FR / 1.4105

Description

430FR / 1.4105 is a ferritic stainless steel with increased silicon content, designed for soft magnetic components operating in corrosive environments. It offers improved magnetic characteristics, higher electrical resistivity, and increased hardness compared to standard 430 grade steel.

Chemical Composition

Element Minimum Maximum
Carbon -- 0.07
Chromium 17.25 18.25
Iron Balance --
Manganese -- 0.80
Molybdenum -- 0.50
Nickel -- 0.60
Phosphorus -- 0.030
Silicon 1.00 1.50
Sulphur 0.250 0.040

Mechanical Properties

Property Value
Tensile Strength 78 ksi
Yield Strength 50 ksi
Elongation at Break 30%

Thermal & Physical Properties

  • Increased hardness over 430F due to higher silicon levels
  • Weak coercive magnetic force (Hc =1.88 – 3.00 Oe [150 – 240 A/m])

    • Other Designations

  • ASTM: A838 Alloy 2
  • EN: 10088-3 Grade 1.4105, X6CrMoS17

    • Fabrication and Heat Treatment

  • Steelmaking: ESR melting
  • Hot forging/rolling
  • Heat Treatment

    • Applications

  • Solenoid valves
  • Injectors
  • Aerospace
  • Automotive
  • Industrial components

    • Supplied Forms

  • Round bar diameter: 1.00 mm to 600 mm
  • Flat bar
  • Plate

    • Features

  • Corrosion resistance in fresh water, moderately acidic, and low chlorine environments
  • Increased magnetic characteristics and higher electrical resistivity compared to standard 430 grade
  • Controlled processing allows superior and consistent magnetic properties

    • The DIN number for 430FR stainless steel is 1.4105, also known as X6CrMoS17

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