REQUEST FOR QUOTE

BÖHLER M789 AMPO

BÖHLER M789 AMPO is a newly developed maraging steel, which combines the mechanical properties of 1.2709 with the corrosion resistance of 17-4PH. This patent bending grade can easily printed without any preheating and achieves a hardness of about 52 HRC with a very easy heat treatment. Furthermore, this material shows an excellent polishability, which makes it the ideal choice for inserts with conformal cooling in plastic injection molding and in any other application where a high hardness and corrosion resistance is of need.

Properties
  • Toughness & Ductility: high
  • Wear Resistance: good
  • Machinability: very high
  • Dimensional stability: very high
  • Polishability : very high
  • Corrosion resistance : very high
  • Micro-cleanliness : very high
Particle Size Distribution 15-45µm*
Typical Values D10 D50 D90
[μm] 18-24 19-35 42-50

* Measurement of particle size distribution is based on ISO 13322-2 (Dynamic image analysis methods);
Apparent density** min. 3.5 g/cm³
** Flowability and apparent density are based on DIN EN ISO 4490 resp. DIN EN ISO 3923-1.

Mechanical Properties

With according Heat Treatment
Tensile strength (Rm) (MPa) 1,800 to 1,900
Yield strength (RP₀,₂) (MPa) 1,670 to 1,770
Elongation (%) 4 to 8
Hardness (HRc) 51 to 53
Impact Toughness (ISO-V) (J) 6 to 14

Chemical composition

C < 0.02 Cr 12.20 Mo 1.00
Ni 10.00 Ti 1.00 Al 0.60