METAL SOLUTIONS

EOS CobaltChrome MP1

Material Data Sheet

EOS CobaltChrome MP1

Parts have good corrosion resistance and high mechanical properties even at elevated temperatures plus are nickel-free and show a fine, uniform crystal grain structure. This combination is ideal for many applications in the aerospace and medical industries.

MAIN CHARACTERISTICS

  • Corrosion resistance 
  • Great elevated temperature performance 
  • Nickel-free

TYPICAL APPLICATIONS

Various applications in aerospace and medical field

The EOS Quality Triangle

EOS uses an approach that is unique in the AM industry, taking each of the three central technical elements of the production process into account: the system, the material and the process. The data resulting from each combination is assigned a Technology Readiness Level (TRL) which makes the expected performance and production capability of the solution transparent.

EOS incorporates these TRLs into the following two categories:
 
  • Premium products (TRL 7-9): offer highly validated data, proven capability and reproducible part properties. 
  • Core products (TRL 3 and 5): enable early customer access to newest technology still under development and are therefore less mature with less data.

All of the data stated in this material data sheet is produced according to EOS Quality Management System and international standards
EOS 3D Printing Solutions Quality Triangle

POWDER PROPERTIES

The chemical composition of EOS CobaltChrome MP1 is in accordance with standards ASTM F1537/F799, ASTM F75, ISO 5832-12 and ISO 5832-4.

Powder Chemical Composition (wt.-%)

Element Min. Max.
Co Balance
Cr 27 30
Mo 5 7
W 0 0.2
Ni 0 0.1
Fe 0 0.75
Mn 0 1
Si 0 1
C 0 0.14

Powder Particle Size

Generic Particle Size Distribution 15 - 45 µm

HEAT TREATMENT

Description

Stress relieving & solution annealing heat treatment relaxes residual stresses, provides anisotropy and increases ductility of the material.

Steps

Load parts in the cold furnace with Ar-atmosphere.
Heat up with heating rate of 10°C/min.
Soaking time in temperature of 1150°C ± 15°C (2102°F) for 6h (± 15min).
Quench immediately after soaking to room temperature water.

Process Data Sheet

EOS CobaltChrome MP1 for EOS M 290 | 40 µm

EOS M 290 - 40 µm - TRL 7

System Setup EOS M 290
EOS Material set MP1_PerformanceM291
Software Requirements

EOSPRINT 2.3 or newer
EOSYSTEM 2.1 or newer
Recoater Blade HSS (High Speed Steel)
Nozzle EOS Grid Nozzle
Inert gas Nitrogen
Sieve 63 µm
Additional Information
Layer Thickness 40 µm
Volume Rate 4.2 mm³/s
Min. Wall Thickness 0.4 mm

Chemical and Physical Properties of Parts

The chemical composition is in accordance with standards ASTM F1537/F799, ASTM F75, ISO 5832-12 and ISO 5832-4.

Microstructure of the Produced Parts

Defects Thickness Result Number of Samples
Average Defect Percentage 40 µm <0.1 % -
Density EN ISO 3369 Thickness Result Number of Samples
Average Density 40 µm ≥ 8.30 g/cm³ -

Mechanical Properties Heat Treated

EN ISO 6892-1 Room Temperature | 40 µm Yield Strength [MPa] Tensile Strength [MPa] Elongation at Break A [%] Reduction of Area Z [%] Modulus of elasticity [GPa] Number of Samples
Vertical 630 1140 32 - 208 -
Horizontal 640 1130 28 - 205 -

Stress relieving & solution annealing heat treatment relaxes residual stresses, provides anisotropy and increases ductility of the material. 

Steps:
Load parts in the cold furnace with Ar-atmosphere.
Heat up with heating rate of 10°C/min.
Soaking time: in temperature of 1150°C ± 15°C (2102°F) for 6h (± 15min).
Quench immediately after soaking to room temperature water.

Modulus of elasticity testing according to EN ISO 6892-1 Method A, Range 1 (0.00007 1/s).

Mechanical Properties As Manufactured

EN ISO 6892-1 Room Temperature | 40 µm Yield Strength [MPa] Tensile Strength [MPa] Elongation at Break A [%] Reduction of Area Z [%] Modulus of elasticity [GPa] Number of Samples
Vertical 820 1220 23 - 170 -
Horizontal 1060 1350 13 - 191 -

Modulus of elasticity testing according to EN ISO 6892-1 Method A, Range 1 (0.00007 1/s).

Hardness

Heat Treated
Value 34
Unit HRC
Number of samples 15
As Manufactured
Value 39
Unit HRC
Number of samples 24

Fatigue

Heat Treated
Fatigue strength [MPa] 543

Rotating bar bending ISO-1143 2010, four point bending. Data analysis: applied staircase method (ISO-12107 2012), 7 samples, mean stress level of least occuring event, run out limit 10M cycles.

Surface Roughness

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