Steel name: En 41
  Diagram No.: 3269
  Type of diagram: TTT
  BS designation: En 41
  Chemical composition in weight %: 0.40% C, 0.53% Si, 0.56% Mn, 0.001% S, 0.012% P,
  0.21% Ni, 1.65% Cr, 0.23% Mo, 1.10% Al.
  Note: Nitriding steel. Austenitized at 900^oC for 30 min.
  Source: J. Woolman and R.A. Mottram, The Mechanical and Physical Properties of The
  British Standard EN Steels, Volume 3, The British Iron and Steel Research Association,
  A Pergamon Press Book, New York, 1968, p.35.

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