METAL SOLUTIONS

EOS Aluminium Al5X1

Material Data Sheet

EOS Aluminium Al5X1

High Strength & High Elongation Aluminium for AM

EOS Aluminium Al5X1 is a heat-treatable aluminium alloy designed for AM to offer a compelling combination of high strength and high elongation. Al5X1 exhibits excellent mechanical properties with a strength above 400 MPa and an elongation exceeding 13% after heat treatment. The recommended single-step heat treatment does not require a water quench and enables robust part production.

MAIN CHARACTERISTICS

  • Excellent combination of strength & elongation
  • Good corrosion resistance
  • Parts can be anodized

Download Process Data Sheet (PDF)

TYPICAL APPLICATIONS

  • Aerospace
  • Automotive
  • Marine
  • Lightweight designs

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

The chemical composition of EOS Aluminium Al5X1 is specially designed for AM.  Powder composition values shown below are typical.

Powder Chemical Composition (wt.-%)

Element Min. Max.
Al Balance
Mg 2.5 4.2
Zr 0.6 1.8
Mn 0.1 1.0
Fe 0.0 1.0
Si 0.0 1.0
Ti 0.0 1.0

Powder Particle Size

GENERIC PARTICLE SIZE DISTRIBUTION 20 - 63 μm

SEM micrograph of EOS Aluminium Al5X1 powder

HEAT TREATMENT

Description

Heat treatment procedure

Steps

Direct ageing heat treatment

6 hours at 400 °C. Immediate gas quenching (air cooling with maximal air flow).

Preferred inert atmosphere during furnace treatment.

Process Data Sheet

EOS Aluminium Al5X1 for EOS M 290 | 40 µm

EOS M 290 - 40 µm - TRL 3

System Setup EOS M 290
EOS Material set Al5X1_040_CoreM291_100
Software Requirements

EOSPRINT 2.11 or newer
EOSYSTEM 2.15 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 4.8 mm³/s

Chemical and Physical Properties of Parts

The chemical properties of the parts are the same as that of the powder.

Microstructure of the Produced Parts

Defects Thickness Result Number of Samples
Average Defect Percentage 40 µm 0.15 % -
Density EN ISO 3369 Thickness Result Number of Samples
Average Density 40 µm 2.69 g/cm³ -

Mechanical Properties

Mechanical Properties Heat Treated

ASTM E8 Room Temperature Yield Strength [MPa] Tensile Strength [MPa] Elongation at Break [%] Reduction of Area Z [%] Number of Samples
Vertical 380 415 14.5 - - -
Horizontal 385 415 14.5 - - -

ASTM E8, strain rate 0.00762 mm/s

Mechanical Properties As Manufactured

Room Temperature Yield Strength [MPa] Tensile Strength [MPa] Elongation at Break [%] Reduction of Area Z [%] Number of Samples
Vertical 240 310 23 - - -
Horizontal 260 310 23 - - -

Hardness

Heat Treated
Value 127
Unit HBW 2.5/62.5
Heat Treated
Value 71
Unit HRB
As Manufactured
Value 86
Unit HBW 2.5/62.5
As Manufactured
Value 40
Unit HRB

Thermal Conductivity

ASTM E1461-13 Orientation [W/m*K]
Heat Treated Vertical 132

Surface Roughness

Specific heat capacity at 25°C

AST E1269-11 Heat Treated
Value 0.87
Unit J/g/°C

Anodization

SEM image of the anodizing layer. 
Anodized according to Mil-A-8625 Type III

Thickness of anodization layer 
depends on used anodization 
process.

Electrical Conductivity

ASTM E1004-17 Orientation Typical Electrical Conductivity [%IACS]
As Manufactured / 40 µm / Vertical 23
ASTM E1004-17 Orientation Typical Electrical Conductivity [%IACS]
Heat Treated / 40 µm / Vertical 34
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