Process Data Sheet

EOS StainlessSteel SuperDuplex for EOS M 290 | 40/80 µm

EOS M 290 - 40/80 µm - TRL 3

System Setup EOS M 290
EOS Material set SuperDuplex_040_080_CoreM291_100
Software Requirements

EOSPRINT 2.9 or newer

EOSYSTEM 2.12 or newer
Recoater Blade Ceramic
Nozzle EOS Grid Nozzle
Inert gas Argon
Sieve 75 µm µm
Additional Information
Layer Thickness 40/80 µm
Volume Rate 4.1-7.9 mm³/s

Chemical and Physical Properties of Parts

Chemical composition of built parts is compliant to EOS StainlessSteel SuperDuplex powder chemical composition.

Micrograph etched, heat treated state. Etchant: Aqua regia

Microstructure of the Produced Parts

Defects Thickness Result Number of Samples
Average Defect Percentage 40 µm 0.04 % -
Average Defect Percentage 80 µm 0.08 % -
Density EN ISO 3369 Thickness Result Number of Samples
Average Density 40 µm ≥ 7.80 g/cm³ -
Density EN ISO 3369 Thickness Result Number of Samples
Average Density 80 µm ≥ 7.80 g/cm³ -

Mechanical Properties

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 1020 1180 16 - 200 -
Horizontal 1170 1260 13 - 200 -

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 560 860 34 - 200 -
Horizontal 580 870 34 - 200 -

Mechanical Properties As Manufactured

EN ISO 6892-1 Room Temperature | 80 µm Yield Strength [MPa] Tensile Strength [MPa] Elongation at Break A [%] Reduction of Area Z [%] Modulus of elasticity [GPa] Number of Samples
Vertical 880 1050 20 - 200 -
Horizontal 1030 1130 17 - 200 -

Mechanical Properties Heat Treated

EN ISO 6892-1 Room Temperature | 80 µm Yield Strength [MPa] Tensile Strength [MPa] Elongation at Break A [%] Reduction of Area Z [%] Modulus of elasticity [GPa] Number of Samples
Vertical 560 860 35 - 200 -
Horizontal 570 870 33 - 200 -

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

Solution annealing 
Hold temperature 1 100 °C, hold time 0.5 h when thoroughly heated, water quenching.
Typical dimensional change after heat treatment -0.4 % (40 µm) or -0.8 % (80 µm).

Impact Toughness

EN ISO 148-1, Charpy-V As Manufactured
Typical Impact Toughness [J] 110
Layer Thickness 40 µm
EN ISO 148-1, Charpy-V Heat Treated
Typical Impact Toughness [J] 155
Layer Thickness 40 µm
EN ISO 148-1, Charpy-V As Manufactured
Typical Impact Toughness [J] 70
Layer Thickness 80 µm
EN ISO 148-1, Charpy-V Heat Treated
Typical Impact Toughness [J] 140
Layer Thickness 80 µm

Surface Roughness

Coefficient of Thermal Expansion

As Manufactured Temperature
10.42*10-6/K 25 – 100 ºC
11.12*10-6/K 25 – 200 ºC
11.51*10-6/K 25 – 300 ºC
Heat Treated Temperature
13.63*10-6/K 25 – 100 ºC
14.81*10-6/K 25 – 200 ºC
15.32*10-6/K 25 – 300 ºC
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