• High Peak Steels Ltd, Brookfield Ind Est, Peakdale Road, Glossop, Derbyshire, SK13 6LQ

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EN24 (817M40T) Engineering steel

EN24 (817M40T) is a very high strength steel alloy which is supplied hardened and tempered ideal for gears.

The grade is a nickel chromium molybdenum combination – this offers high tensile steel strength, with good ductility and wear resistance characteristics. With relatively good impact properties at low temperatures, EN24 is also suitable for a variety of raised temperature applications.

EN24 (817M40T) Engineering Steel is easy to treat and temper and is supplied hardened and tempered. The alloy offers a good combination of strength, ductility and wear resistance. It is a very high strength alloy engineering steel.

Steel stock range

High Peak Steels stock EN24 (817M40T) in round bar and also is available in forged block form that we can cold saw to size.

Associated standards

UK Standard EN24 | European Grades 34CrNiMo6 | Werkstoff 1.6565, 1.6582 | SAE/AISI 4340

Or call 01457 866911 for more details

EN24 (817M40T) Black

ProductMin sizeMax size
codes-round240mm dia400mm dia
codes-flat220mm x 10mm900mm x 300mm
codes-square225mm150mm
codes-hex2

EN24 (817M40T) Bright

ProductMetric sizes
Min

Max
Imperial sizes
Min

Max
codes-round210mm dia75mm dia1/2" dia3" dia
codes-flat2
codes-square2
codes-hex2

EN24 (817M40T) Chemical Composition

 CSiMnSPCrNiMo
Min0.360.10.4511.30.2
Max0.440.350.70.040.0351.41.70.35

EN24 (817M40T) Mechanicals

 Yield
N/mm2
0.2% proof
N/mm2
UTS (Rm)
N/mm2
Elong (A)
%
Red of Area (Z)
%
Hardness
HB
Impact Test (KV)
J
Quenched & Tempered to condition T (min)
6808501324850
Quenched & Tempered to condition T (max)
1000302
Quenched & Tempered to condition U (min)
7559251226942
Quenched & Tempered to condition U (max)
1075331
Quenched & Tempered to condition V (min)85010001229342
Quenched & Tempered to condition V (min)85011501229342
Drawn Quenched & Tempered to condition T (min)700850924850
Drawn Quenched & Tempered to condition T (max)1000302

EN24 (817M40T) Typical applications

  • High strength shafts
  • Punches & dies
  • Drill bushings
  • Retaining rings
  • Gears