Material data sheet - FlexLine

EOS StainlessSteel 316L
EOS StainlessSteel 316L is a corrosion resistant iron based alloy which has been optimized forprocessing on EOS DMLS systems. This document provides information and data for parts built
using EOS StainlessSteel 316L powder (EOS art.-no. 9011-0032) on the following system specifications:- EOS DMLS system M290-

HSS blade (2200-4073)-

Grid nozzle (2200-5501)-

IPCM sieving module with 63µm mesh size (9044-0032) recommended-Argon atmosphere- Software: EOSYSTEM 2.5 or newer- EOS Parameter set: 316L 40µm FlexLine(Default Job: 316L_040_FlexM291_100)

Description
The parts built from EOS StainlessSteel 316L have chemical composition corresponding to ASTM
F138 “Standard Specification for Wrought 18Cr-14Ni-2.5Mo Stainless Steel Bar and Wire for
Surgical Implants (UNS S31673)”. This kind of stainless steel is characterized having a good corrosion resistance and evidence that there are no leachable substances in cytotoxic
concentrations.
This material is ideal in- Lifestyle/Consumer, e.g. watches, other jewellery, spectacle frames, decorations- Automotive/Industrial, e.g. non-corroding common material, food and chemical plants- Aerospace/Turbine industry- Entry-level material for Laser Sintering Technology, e.g. mounting parts, heat exchangers,functional elements in electronic housing and accessories
Parts built from EOS StainlessSteel 316L can be machined, shot-peened and polished in as-built
or stress relieved (AMS2759) states if required. Solution annealing is not necessary because themechanical properties of as-built state are showing desired values (ASTM A403). Parts are notideal in temperature range 427°C - 816°C where precipitation of chromium carbides occurs.

EOS StainlessSteel 316L
Owner: HHE / Approved: SPU
CR365 v03 / 12.2016

1/4

Electro Optical Systems Finland Oy

EOS GmbH - Electro Optical Systems

Lemminkäisenkatu 36
FIN-20520 Turku

Robert-Stirling-Ring 1
D-82152 Krailling / München

Telephone: +358 20 765 9144
Telefax: +358 20 765 9141

Telephone: +49 (0)89 / 893 36-0
Telefax: +49 (0)89 / 893 36-285
Internet:
www.eos.info

Material data sheet - FlexLine

Due to layer-wise building method, the parts have a certain anisotropy which could be seenfrom mechanical properties.

Technical Data
Powder properties
Material composition

ElementMin.
[wt.-%]

Max[wt.-%]

Cr

17.00

19.00

Ni

13.00

15.00

Mo

2.25

3.00

C-

0.030

Mn-

2.00

Cu-

0.50

P-

0.025

S-

0.010

Si-

0.75

N-

0.10

Max. particle size
Particles ≥ 53µm [1][1]≤ 5.5 wt.-%

Sieve analysis according to ASTM B214.

EOS StainlessSteel 316L
Owner: HHE / Approved: SPU
CR365 v03 / 12.2016

2/4

Electro Optical Systems Finland Oy

EOS GmbH - Electro Optical Systems

Lemminkäisenkatu 36
FIN-20520 Turku

Robert-Stirling-Ring 1
D-82152 Krailling / München

Telephone: +358 20 765 9144
Telefax: +358 20 765 9141

Telephone: +49 (0)89 / 893 36-0
Telefax: +49 (0)89 / 893 36-285
Internet:
www.eos.info

Material data sheet - FlexLine

General process dataLayer thickness

40 µm

Volume rate [2]3.7 mm³/s (13.3 cm³/h)[2]

The volume rate is a measure of build speed during laser exposure of the skin area. The total build speed depends on this volume rate and many other factors such as exposure parameters of contours, supports, up anddownskin, recoating time, Home-In or LPM settings.

Physical and chemical properties of parts
Part density [3]7.9 g/ cm³

Surface roughness after shot peening [4]Ra 4 µm; Rz 20 µm

[3]
[4]

Weighing in air and water according to ISO 3369.
Measurement according to ISO 4287. The numbers were measured at the horizontal (up-facing) and all vertical surfaces of test cubes. Due to the layerwise building the roughness strongly depends on the orientation of
the surface, for example sloping and curved surfaces exhibit a stair-step effect.

Tensile data at room temperature [5, 6]
As built

Heat treated

Ultimate tensile strength, Rm590 MPa

n.a.

Yield strength, Rp0.2500 MPa

n.aElongation at break, A

46.7 %

n.a[5][6]

The numbers are average values and are determined from samples with horizontal and vertical orientation.
Tensile testing according to ISO 6892 / ASTM E8M, proportional test pieces, diameter of the neck area 5mm(0.2 inch), gauge length 4D = 20.0mm (0.79 inch), stress rate 10MPa/s, strain speed in plastic region 0.375
1/min.

EOS StainlessSteel 316L
Owner: HHE / Approved: SPU
CR365 v03 / 12.2016

3/4

Electro Optical Systems Finland Oy

EOS GmbH - Electro Optical Systems

Lemminkäisenkatu 36
FIN-20520 Turku

Robert-Stirling-Ring 1
D-82152 Krailling / München

Telephone: +358 20 765 9144
Telefax: +358 20 765 9141

Telephone: +49 (0)89 / 893 36-0
Telefax: +49 (0)89 / 893 36-285
Internet:
www.eos.info

Material data sheet - FlexLine

Abbreviations
min.
max.
wt.

minimum
maximum
weightLegal notes
The quoted values refer to the use of this material with above specified EOS DMLS system, EOSYSTEM software
version, parameter set and operation in compliance with parameter sheet and operating instructions. All measured
values are average numbers. Part properties are measured with specified measurement methods using defined test
geometries and procedures. Further details of the test procedures used by EOS are available on request. Any
deviation from these standard settings may affect the measured properties.
The data correspond to EOS knowledge and experience at the time of publication and they are subject to change
without notice as part of EOS' continuous development and improvement processes.
EOS does not warrant any properties or fitness for a specific purpose, unless explicitly agreed upon. This also applies
regarding any rights of protection as well as laws and regulations.
EOS, EOSINT, DMLS, DirectTool and DirectPart are registered trademarks of EOS GmbH.
2017 EOS GmbH – Electro Optical Systems. All rights reserved.

EOS StainlessSteel 316L
Owner: HHE / Approved: SPU
CR365 v03 / 12.2016

4/4

Electro Optical Systems Finland Oy

EOS GmbH - Electro Optical Systems

Lemminkäisenkatu 36FIN-20520 Turku

Robert-Stirling-Ring 1D-82152 Krailling / München

Telephone: +358 20 765 9144
Telefax: +358 20 765 9141

Telephone: +49 (0)89 / 893 36-0
Telefax: +49 (0)89 / 893 36-285
Internet:
www.eos.info