En24 Steel

EN24 is a very popular grade of through-hardening alloy steel, which is readily machinable in the quenched and tempered condition. It is most suitable for the manufacture of parts such as heavy-duty axles and shafts, gears, bolts and studs. EN24 can be further surface-hardened typically to 58-60 HRC by induction or nitride processes, producing components with enhanced wear resistance.

In addition to the above, EN24 is capable of retaining good impact values at low temperatures, hence it is frequently specified for harsh offshore applications such as hydraulic bolt tensioners and shipborne mechanical handling equipment.

817M40 (EN24) Specification Chemical composition

  • Carbon
  • Silicon
  • Manganese
  • Sulphur
  • Phosphorus
  • Chromium
  • Molybdenum
  • Nickel
  • 0.36-0.44%
  • 0.10-0.35%
  • 0.45-0.70%
  • 0.040 Max
  • 0.035 Max
  • 1.00-1.40%
  • 0.20-0.35%
  • 1.30-1.70%

 

817M40 (EN24) – mechanical properties in “Q & T” condition

  • Max Stress
  • Yield Stress
  • Yield Stress
  • 0.2% Proof Stress
  • 0.2% Proof Stress
  • Elongation
  • Impact KCV
  • Impact KCV
  • Hardness
  • 850-1000 n/mm2
  • 680 n/mm2 Min
  • 650 n/mm2 Min
  • 665 n/mm2 Min
  • 635 n/mm2 Min
  • 13% Min
  • 50 Joules Min
  • 35 Joules Min
  • 248-302 Brinell
  • (up to 150mm LRS)
  • (over 150 to 250mm LRS)
  • (up to 150mm LRS)
  • (over 150 to 250mm LRS)
  • (9% if cold drawn)
  • (up to 150mm LRS
  • (over 150 to 250mm LRS)
  • (850-1000 n/mm2)

 

EN24 Equivalents

  • BS970: 1955
  • BS970/PD970: 1970 onwards
  • European
  • Werkstoff No.
  • US SAE (AISI)
  • EN24
  • 817M40
  • 34CrNiMo6
  • 1.6582
  • 4340

 

For your requirements kindly call us today on 9820025412 or 9987364999 or email us on [email protected]

Quick Enquiry
Max file size is 64 MB.