Process Data Sheet

EOS MaragingSteel MS1 for EOS M 290 | 40 µm Performance

EOS M 290 - 40 µm - TRL 8

Process Information Metal

This process product is optimized for building high quality parts with EOS M 290 using EOS MaragingSteel MS1, and also compatible with EOS M 290-2.

System Setup EOS M 290
EOS Material set MS1_040_PerformanceM291
Recoater Blade Ceramic
Nozzle EOS Grid Nozzle
Inert gas Nitrogen
Sieve 63 µm
Additional Information
Layer Thickness 40 µm
Volume Rate 4.2 mm³/s
Typical Dimensional Change after HT [%] +0.1 %

Chemical and Physical Properties of Parts

Chemical composition of printed parts matches the chemistry of EOS MaragingSteel MS1 powder.

Micrograph or polished surface

Microstructure of the Produced Parts

Defects Thickness Result Number of Samples
Average Defect Percentage 40 µm 0.04 % 10

Mechanical Properties

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 2010 2100 4 - 190 -
Horizontal 2020 2085 4.5 - 190 -

Modulus of Elasticity according to ASTM E 132-04

EOS MaragingSteel can be heat treated to match  various needs of different applications. The two step  heat treatment can be performed under vacuum or inert gas atmosphere. First step is solution annealing to minimize amount of austenite in the martensitic matrix. The needed hardness and strength is achieved through aging treatment where hardening takes place through forming of intermetallic phases and precipitates.

Solution annealing:
2 h at 940 °C (±10 °C) measured from the part followed by rapid air cooling to room temperature (below 32 °C). Cooling rate 5-60 °C/min.
Reaching room temperature before starting aging treatment is required to achieve desired microstructure.

Aging:
For peak hardness of 54 HRC age 6 h at 490 °C (±10 °C) measured from the part followed by air cooling.
Mechanical properties presented in this document achieved through this aging procedure. 

T95: Tolerance intervals provide lower bounds where 95 % of the population falls with 95 % confidence. Tolerance intervals are based on validation data/QA statistics and are not directly transferable to other systems.

Impact Toughness

Charpy-V impact toughness in relation to hardness and aging temperature according to ISO 148.

Fatigue

Heat Treated
Fatigue strength [MPa] 650

Fatigue strength determines a stress level where specimen fails at a defined number of stress cycles. Fatigue strength was estimated statistically according to ISO 12107. Testing was performed according to ASTM E466. Fatigue results typically show large deviations due to the nature of the fatigue process.

Surface Roughness

Coefficient of Thermal Expansion

ASTM E228 Temperature
10.6*10-6/K 25 – 100 ºC
10.9*10-6/K 25 – 200 ºC
11.2*10-6/K 25 – 300 ºC
11.5*10-6/K 25 – 400 ºC
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