722M24 / EN40B

3% Chromium–Molybdenum Nitriding Steel

Surcharge

£889.21 per tonne

Surcharge Price History for 722M24 / EN40B

DEC 22 MAR 23 JUN 23 SEP 23 TODAY
£899.32 £1,136.82 £1,043.61 £911.79 £889.21

The surcharge data provided is based on the information available to us and represents an average of the surcharge mechanisms taken from various global steel producers. It is intended to only provide an indication of market movements and does not necessarily reflect the specific surcharges applied to individual material batches.

Product Method

Rolled or Forged

Finishes

Black Bar or Bright Bar

Description

722M24 grade steel is a chromium-molybdenum nitriding steel often supplied in the hardened and tempered condition (typically with 1075 N/mm² tensile strength).

After nitriding it develops a hard wear resistant case in the range of 61-65HRc with good resistance to shock and fatigue.

The relatively low temperature of the nitriding process produces components with a scale free surface and minimum distortion. No significant loss of surface hardness will result from operating temperature up to 500°C.

Size Range

32mm - 860mm Dia

Typical applications of 722M24 grade steel

  • Aircraft applications 
  • Crankshafts
  • Gears
  • Plastic moulds
  • Compressor discs
  • Pins
  • Spindles 
  • Bolts

722M24 steel is still often referred to as EN40B steel - its equivalent grade under the previous BS 970: 1955 standard.

Equivalent Grades

BS 970: 1955
EN40B
£123

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Stock Availability

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