Process Data Sheet

EOS StainlessSteel 316L-4441 for EOS M 290 | 20 µm

EOS M 290 - 20 µm - TRL 9

Process Information Metal

This process product is optimized for robustly building parts with EOS M290 system using EOS StainlessSteel 316L-4441. The mechanical properties have been validated to TRL9 level.

System Setup EOS M 290
EOS Material set 316L_Surface
Software Requirements

EOSPRINT 2.7 or newer
EOSYSTEM 2.11 or newer
Recoater Blade HSS (High Speed Steel)
Nozzle Standard
Inert gas Argon
Sieve 63 µm
Additional Information
Layer Thickness 20 µm
Volume Rate 2.0 mm³/s
Wall Thickness 0.3 - 0-4 mm
Typical Dimensional Change after HT [%] +0.02 %

Chemical and Physical Properties of Parts

Chemical composition of built parts is compliant to EOS StainlessSteel 316L powder chemical composition.

Micrograph of polished surface

Microstructure of the Produced Parts

Defects Thickness Result Number of Samples
Average Defect Percentage 20 µm 0.018 % 45
Density EN ISO 3369 Thickness Result Number of Samples
Average Density 20 µm ≥7.97 g/cm³ 45

Mechanical Properties

Mechanical Properties As Manufactured

EN ISO 6892-1 Room Temperature | 20 µm Yield Strength [MPa] Tensile Strength [MPa] Elongation at Break A [%] Reduction of Area Z [%] Modulus of elasticity [GPa] Number of Samples
Vertical 480 560 49 - - 363
Horizontal 540 645 38 - - 246
T99: Tolerance intervals provide lower bounds where 99 % of the population falls with 95 % confidence. Tolerance intervals are based on validation data/QA statistics and are not directly transferable to other systems.

Surface Roughness

Coefficient of Thermal Expansion

As Manufactured Temperature
15.72*10-6/K 25 – 100 ºC
16.75*10-6/K 25 – 200 ºC
17.27*10-6/K 25 – 300 ºC
17.7*10-6/K 25 – 400 ºC
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