EN9

EN9 Grade Introduction:

EN9 carbon steel is a medium carbon steel grade commonly supplied in the as-rolled condition. It can be flame or induction hardened to produce a high surface hardness with excellent wear resistance for a carbon steel grade. EN9 bar is available in full lengths or can be cut to your requirements. EN9 carbon round steel bar flame cut steel plates can be supplied cut to your required sizes and normalized. Flame cut plates can be supplied Lumsden ground or precision ground.

EN9 Grade Application:

  • axes
  • shafts
  • knives
  • bushes
  • crankshafts
  • screws

EN9 Equivalent Grades:

BS 970 1991 BS 970 1955 EN AISI/SAE Werkstoff
070M55 EN9 1055 1.0535

EN9 Chemical Composition:

Element Content (%)
C 0.50-0.60
Si 0.4 Max
Mn 0.50-0.80
P 0.035 Max
S 0.015-0.035
Cr 0.30 Max

Mechanical Properties:

Condition Ruling Section (mm) Tensile Strength (MPa) Yield Strength (MPa) Elongation Hardness, HBW
N 254 600-700 ≥310 13% 201-255
R 100 690-850 ≥415 14% 201-255
S 65 770-930 ≥480 14% 223-277
T 20 850-1000 ≥570 12% 248-302

Physical Properties:

Thermal Properties:

Forging Properties:

Preheat the component carefully, then raise the temperature to 1100°C for forging. Do not forge below 850°C. After forging cool slowly, preferably in a furnace.

Stress Relieving:

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