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21-12N

UNS #S63017

21-12N valve steel is an austenitic, nitrogen-bearing, chrome-nickel alloy with excellent high-temperature strength and hardness as well as corrosion resistance to combustion products. It contains 0.15/0.25 weight % nitrogen for increased high temperature strength.

Type Analysis

  • Carbon (Maximum) 0.2
  • Silicon (Nominal) 0.8
  • Nickel (Nominal) 11.5
  • Manganese (Nominal) 1.75
  • Chromium (Nominal) 21
  • Iron (Nominal) Balance
  • Nitrogen (Nominal) 0.2

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