F91

  1. %C 0.08-0.12
  2. %Mn 0.30-0.60
  3. %S 0.010 MAX
  4. %P 0.020 MAX
  5. %Si 0.20-0.50
  6. %Cr 8.00-9.50
  7. %Ni 0.40 MAX
  8. %Mo 0.85-1.05
  9. Other Nb=0.06-0.10
  10. N=0.03-0.07
  11. Al=0.040 MAX
  12. V=0.18-0.25

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