Stainless Steel Component
METAL SOLUTIONS

EOS StainlessSteel 254

Material Data Sheet

EOS StainlessSteel 254

EOS StainlessSteel 254 is an austenitic stainless steel for extreme conditions. The high chromium, molybdenum and nitrogen alloying give excellent corrosion resistance in many difficult environments. The general pitting resistance equivalent PREN for 254 is 43 (PREN = %Cr + 3.3 X %Mo + 16 X %N).

MAIN CHARACTERISTICS

  • Excellent resistance to uniform, pitting and crevice corrosion
  • High resistance to stress corrosion cracking
  • Higher strength than conventional austenitic stainless steels

TYPICAL APPLICATIONS

  • Chlorinated seawater handling equipment
  • Pulp and paper manufacturing devices
  • Chemical handling equipment

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

EOS StainlessSteel 254 powder material is in accordance with DIN EN 10088-3, EN 1.4547

Powder Chemical Composition (wt.-%)

Element Min. Max.
Cr 19.5 20.5
Ni 17.5 18.5
Mo 6.0 7.0
Cu 0.5 1.0
N 0.18 0.25

Powder Particle Size

GENERIC PARTICLE SIZE DISTRIBUTION 20 - 65 μm

HEAT TREATMENT

Description

Heat treatment procedure

Steps

Optional solution annealing: At 1180 °C for 2 h after parts have fully heated through, water quenching Typical dimensional change after heat treatment: 0.06 %

Process Data Sheet

EOS StainlessSteel 254 for EOS M 290 | 40 µm

EOS M 290 - 40 µm - TRL 3

System Setup EOS M 290
EOS Material set 254_040_CoreM291_100
Software Requirements

EOSPRINT 2.8 or newer

EOSYSTEM 5.20 or newer
Recoater Blade HSS (High Speed Steel)
Nozzle EOS Grid Nozzle
Inert gas Argon
Sieve 75 µm
Additional Information
Layer Thickness 40 µm
Volume Rate 4.1 mm³/s

Chemical and Physical Properties of Parts

Micrograph etched as manufactured Etchant: ASTM E407-07, etchant 12

Microstructure of the Produced Parts

Defects Thickness Result Number of Samples
Average Defect Percentage 40 µm 0.01 % -
Density EN ISO 3369 Thickness Result Number of Samples
Average Density 40 µm ≥ 8.07 g/cm³ -

Mechanical Properties

Mechanical Properties Heat Treated

EN ISO 6892-1 Room Temperature Yield Strength [MPa] Tensile Strength [MPa] Elongation at Break [%] Reduction of Area Z [%] Number of Samples
Vertical 360 660 48 - -
Horizontal 360 700 43 - -

Optional solution annealing
At 1 180 °C for 2 h after parts have fully heated through, water quenching
Typical dimensional change after heat treatment: 0.06 %

Mechanical Properties

Mechanical Properties As Manufactured

EN ISO 6892-1 Room Temperature Yield Strength [MPa] Tensile Strength [MPa] Elongation at Break [%] Reduction of Area Z [%] Number of Samples
Vertical 600 720 35 - -
Horizontal 680 810 29 - -

Surface Roughness

Coefficient of Thermal Expansion

ASTM E228 Temperature
14.8*10-6/K 25 – 100 ºC
15.7*10-6/K 25 – 200 ºC
16.3*10-6/K 25 – 300 ºC
16.7*10-6/K 25 – 400 ºC
Process Data Sheet

EOS StainlessSteel 254 for EOS M 290 | 60 µm

EOS M 290 - 60 µm - TRL 3

System Setup EOS M 290
EOS Material set 254_060_CoreM291_100
Software Requirements

EOSPRINT 2.8 or newer

EOSYSTEM 5.20 or newer
Recoater Blade HSS (High Speed Steel)
Nozzle EOS Grid Nozzle
Inert gas Argon
Sieve 75 µm
Additional Information
Layer Thickness 60 µm
Volume Rate 6.1 mm³/s

Chemical and Physical Properties of Parts

Micrograph etched as manufactured Etchant: ASTM E407-07, etchant 12

Microstructure of the Produced Parts

Defects Thickness Result Number of Samples
Average Defect Percentage 60 µm 0.02 % -
Density EN ISO 3369 Thickness Result Number of Samples
Average Density 60 µm ≥ 8.07 g/cm³ -

Mechanical Properties

Mechanical Properties Heat Treated

EN ISO 6892-1 Room Temperature Yield Strength [MPa] Tensile Strength [MPa] Elongation at Break [%] Reduction of Area Z [%] Number of Samples
Vertical 360 660 48 - -
Horizontal 360 700 44 - -

Optional solution annealing
At 1 180 °C for 2 h after parts have fully heated through, water quenching.

Typical dimensional change after heat treatment: 0.06 %

Mechanical Properties

Mechanical Properties As Manufactured

EN ISO 6892-1 Room Temperature Yield Strength [MPa] Tensile Strength [MPa] Elongation at Break [%] Reduction of Area Z [%] Number of Samples
Vertical 580 730 36 - -
Horizontal 660 800 30 - -

Surface Roughness

Coefficient of Thermal Expansion

ASTM E228 Temperature
14.8*10-6/K 25 – 100 ºC
15.7*10-6/K 25 – 200 ºC
16.3*10-6/K 25 – 300 ºC
16.7*10-6/K 25 – 400 ºC
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