(a) About EOS Maraging Steel MS1

EOS MaragingSteel MS1 is a martensite-hardenable steel. Its chemical composition corresponds to US classification 18% Ni Maraging 300, European 1.2709 and German X3NiCoMoTi 18-9- 5.

Material Composition:

Fe (balance) Ni (17 – 19 wt-%) Co (8.5 – 9.5 wt-%) Mo (4.5 – 5.2 wt-%) Ti (0.6 – 0.8 wt-%) Al (0.05 – 0.15 wt-%) Cr, Cu (each 0.5 wt-%) C (0.03 wt-%) Mn, Si (each 0.1 wt-%)P, S (each 0.01 wt-%)

(b) Physical Properties

Excellent strength combined with high toughness. The parts are easily machinable after the building process. They have good thermal conductivity and can be easily post-hardened to more than 50 HRC. They also have excellent polishability.

ParameterAs Built (typical)After Age-Hardening
Tensile StrengthXY: 1100 ± 100 MPa; Z: 1100 ± 100 MPaMin. 1930 MPa ; typ:2050 ± 100 MPa
Yield StrengthXY: 1050 ± 100 MPa; Z: 1000 ± 100 MPaMin. 1862 MPa; typ: 1990 ± 100 MPa
Elongation at breakXY: (10 ± 4 ) %; Z: (10 ± 4 ) %Min. 2 %; typ: (4 ± 2) %
Modulus of elasticityXY: 160 ± 25 GPa; Z: 150 ± 20 GPaTyp. 180 ± 20 GPa
Hardness33 - 37 HRCTyp. 50 - 56 HRC
Ductility45 ± 10 JTyp. 11 ± 4 J

(c) Other Properties

ParameterAs Built (typical)After Age-Hardening
Thermal conductivity15 ± 0.8 W/m°CMin. 1930 MPa ; typ:2050 ± 100 MPa
Specific heat capacity450 ± 20 J/kg°CMin. 1862 MPa; typ: 1990 ± 100 MPa
Max operating tempapprox. 400 °C
Density8.0 - 8.1 g/cm³
Relative DensityApprox 100%

(d) 3D Printing Details

TechnologyDMLS
Possible Post Processingmachined, spark-eroded, welded, micro shot-peened, polished and coated
Age Hardening Shrinkage0.08%
Accuracy20-50 Microns
Volume Rate 1.6 mm³/s – 5.5 mm³/s
Surface RoughnessRa: 4-9 Microns ; Rz: 20-50 Microns

(e) Applications

For applications which require a combination of good thermal properties and low weight

  1. Series-production parts
  2. Tooling (e.g. aluminum die casting)
  3. Mechanical Engineering
  4. Motor Sports and Aerospace interiors

(f) Design Guidelines

Min Wall Thickness0.3-0.4 mm
Min Layer Resolution20 Microns
Min Detail Size0.8 mm
Min Hole Diameter0.8 mm
Min Text Size 2.5 mm
Max Part Dimension300 mm

(g) Gallery

 

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