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Typical Values and Heat Treatment

Properties of DURACON® 45M (typical values)

PropertyUnitBase condition (martensitic)Age hardend state(500 °C/2H)
Tensile strengthRm25 °CMpa [=N/mm²]9501300
Yield strengthRp0.225 °CMpa [=N/mm²]7001300
Young's modulusE25 °CGpa [=kN/mm²]170180
HardnessHV25 °C280480
HardnessHRC25 °C
200 °C
300 °C
400 °C
2848
44
42
40
Toughness at RT (Charpy Impact Test)J> 502,5
Maximum application temperature°Cca. 350
Densityρg/cm³8,38,3
Thermal expansion coefficientα20–100 °C
20–400 °C
10-6 1/K
10-6 1/K
11,1
12,1
10,6
11,3
Electrical conductivityσ25 °CmΩmm²1012
Thermal conductivityλ25 °C
200 °C
400 °C
W/mK72
64
58
82
72
60
Specific heat capacitycp25 °CJ/(g∙K)0,430,43
FerromagnetismYesYes

Heat treatment

The heat treatment (age hardening) at 500 °C can be done under protective atmosphere, or even at normal atmosphere if a slight oxide layer (about 1 µm) can be accepted.

Recommended procedure:

  • quickly heat up to 500 °C (e. g. by putting the piece into a heated up furnace)
  • protective atmosphere recommended, but not conclusive if a thin oxide layer can be allowed
  • after the piece is heated through to 500 °C, the holding time is 2 hours
  • after 2 hours the piece should be cooled down to about 200 °C in less than 2 hours, e. g. by taking the piece out of the furnace
  • no enforced cooling or quenching required