The following materials denote common Matdan manufactured materials, their properties and general characteristics:

302 Stainless Steel

  • 18-8 (Denotes 18% chromium (for corrosion resistance), 8% nickel)
  • Austenitic (Non magnetic; Non heat treatable); Benchmark from which all other 300 series stainless steels are derived. Slight additions/deletions of such elements as Carbon, Nitrogen, Molybdenum and Sulphur determine machinability and end attributes
  • Good formability
  • Increased strength comes from cold working, not from heat treating
  • Corrosion resistant; high temperature strengths scaling resistance

303 Stainless Steel

  • 18-8
  • Austenitic; Free machining alloy with Sulphur content that enhances its machinability
  • Optimum machinability among the Austenitic stainless steels
  • Good corrosion resistance in mild environments
  • Not suitable for use in marine environments
  • Typical applications include nuts, bolts, screws, bushings, shafts and automatic screw machined parts

304 Stainless Steel

  • 18-8
  • Most widely used austenitic stainless steel
  • Great choice when corrosion is a concern with atmosphere, chemical exposure
  • Provides great overall corrosion resistance
  • Low carbon alloy
  • Nicknamed the “General Purpose” 300 series stainless steel
  • Applications include springs, nuts, bolts and screws

316 Stainless Steel

  • 18-8
  • Austenitic; Standard Molybdenum bearing grade
  • For severe environments
  • Excellent corrosion resistance even in chloride environments
  • Not easily machined
  • Type 316 is the main stainless used in the marine environment, with the exception of fasteners and other items where strength and wear resistance are needed, then 304 is typically used

410 Stainless Steel

  • Basic Martinsitic (Magnetic & Heat Treatable) stainless steel
  • Martinsitic stainless steels are optimized for high hardness but provide less corrosion resistance than austenitic grades (300 series)
  • Hardened by heat treat (quench and temper method)
  • Contains minimum of 11.5% chromium, just enough to provide corrosion resistance properties
  • “General Purpose” of 400 series stainless steel
  • Use in applications where high strength and moderate heat and corrosion resistance are required
  • Applications include bolts, nuts, screws and bushings

416 Stainless Steel

  • Martinsitic
  • Highest machinability of any stainless steel due to Sulphur content but this reduces corrosion resistance
  • Useful in dry atmospheres as well as fresh water but unsuitable for marine and other chloride atmospheres
  • Strenge-Martinsitic stainless steels are optimized for high hardness but provide less corrosion resistance than austenitic grades (300 series)
  • Strengthened by heat treatment
  • Applications include nuts & bolts, studs and automatic screw machined parts

430 Stainless Steel

  • Ferritic (Magnetic; Non heat treatable containing chromium but not nickel)
  • Combines good corrosion resistance, machinabiltity and ductility
  • Well suited for use in chemical applications
  • Hardened by annealing, not heat treatment
  • Applications include fasteners

Carbon Steel

  • Designated by distinct AISI (American Iron and Steel Institute) four digit numbers
  • First two digits indicate grade of steel and last 2 digits indicate carbon content in hundredths of a percent
  • Types:
    10xx = Non Resulfurized grades (xx is carbon content in hundredths of a percent)
    11xx = Resulfurized grades
    12xx = Resulfurized and Rephosphorized grades
    15xx = Nonsulfurized grades
  • If L or B is present between the first 2 and last 2 digits; means that particular grade is a Leaded steel or Boron Steel (Ex. 12L14 = Resulfurized and Rephosphorized leaded steel)


  • Good conductor of electricity
  • Possesses good formability and corrosion resistance
  • 6000 series is a heat treatable alloy