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Typical Values and Heat Treatment

Properties of DURACON® 45M (typical values)

Property Unit Base condition (martensitic) Age hardend state(500 °C/2H)
Tensile strength Rm 25 °C Mpa [=N/mm²] 950 1300
Yield strength Rp0.2 25 °C Mpa [=N/mm²] 700 1300
Young's modulus E 25 °C Gpa [=kN/mm²] 170 180
Hardness HV 25 °C 280 480
Hardness HRC 25 °C
200 °C
300 °C
400 °C
28 48
44
42
40
Toughness at RT (Charpy Impact Test) J > 50 2,5
Maximum application temperature °C ca. 350
Density ρ g/cm³ 8,3 8,3
Thermal expansion coefficient α 20–100 °C
20–400 °C
10-6 1/K
10-6 1/K
11,1
12,1
10,6
11,3
Electrical conductivity σ 25 °C mΩmm² 10 12
Thermal conductivity λ 25 °C
200 °C
400 °C
W/mK 72
64
58
82
72
60
Specific heat capacity cp 25 °C J/(g∙K) 0,43 0,43
Ferromagnetism Yes Yes

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