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EOS Aluminum

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EOS Aluminum AlSi10Mg for DMLS Metal 3D Printing

Using modern methods and the latest in DMLS Metal 3D Printing machinery, Fathom delivers high-quality aluminum parts to its valued customers. Whether time-sensitive, high-complexity, high-precision, or short production run related, Fathom has a manufacturing solution that will meet the needs of your unique project.

Why Would You Choose Alsi10mg? / /

EOS Aluminum AlSi10Mg is a widely used alloy that combines lightweight and good mechanical properties. Different treatments may be applied to modify aluminum’s properties, including increasing ductility and conductivity. Aluminum has good thermal and electrical conductivity, especially after it has been treated. Projects requiring parts that are gas-tight can be produced using EOS Aluminum AlSi10Mg. This method is often used to cast parts with thin walls and complex geometry because it has good casting properties. Aluminum has good strength, hardness, and dynamic properties that make it useful for parts subject to high loads.

Parts in EOS Aluminum AlSi10Mg are ideal for applications that require a combination of good thermal properties and low weight. They can be machined, spark-eroded, welded, micro shot-peened, polished and coated if required.

Conventionally cast components in this type of aluminum alloy are often heat-treated to improve the mechanical properties, for example, using the T6 cycle of solution annealing, quenching and age hardening.

The laser-sintering process is characterized by extremely rapid melting and re-solidification. This produces metallurgy and related mechanical properties in the as-built condition, which is similar to T6 heat-treated cast parts. Therefore, such hardening heat treatments are not recommended for laser-sintered parts, but rather a stress-relieving cycle of 2 hours at 300 °C (572 °F). Due to the layerwise building method, the parts have a certain anisotropy, which can be reduced or removed by appropriate heat treatment – see Technical Data for examples.

Alsi10mg Aluminum on EOS System Specifications / /

EOS Aluminum AlSi10Mg is an aluminum alloy in fine powder form which has been specially optimized for processing on EOSINT M systems.

This page provides information and data for parts built using EOS Aluminum AlSi10Mg powder (EOS art.-no. 9011-0024) on the following system specifications:

  • EOSINT M 280 with PSW 3.6 and Original EOS Parameterset AlSi10Mg_Speed 1.0
  • EOS M 290 400Watt with EOSPRINT 1.0 and Original EOS Parameterset AlSi10Mg_Speed 1.0

Aluminum AlSi10Mg Technical Data / /

EOS Aluminum AlSi10Mg is an aluminum alloy in fine powder form which has been specially optimized for processing on EOSINT M systems.

This document provides information and data for parts built using EOS Aluminum AlSi10Mg powder (EOS art.-no. 9011-0024) on the following system specifications:

  • EOSINT M 280 with PSW 3.6 and Original EOS Parameterset AlSi10Mg_Speed 1.0
  • EOS M 290 400Watt with EOSPRINT 1.0 and Original EOS Parameterset AlSi10Mg_Speed 1.0

Description / /

AlSi10Mg is a typical casting alloy with good casting properties and is typically used for cast parts with thin walls and complex geometry. It offers good strength, hardness and dynamic properties and is therefore also used for parts subject to high loads. Parts in EOS Aluminum AlSi10Mg are ideal for applications which require a combination of good thermal properties and low weight. They can be machined, spark-eroded, welded, micro shot-peened, polished and coated if required.

Conventionally cast components in this type of aluminum alloy are often heat treated to im- prove the mechanical properties, for example using the T6 cycle of solution annealing, quenching and age hardening. The laser-sintering process is characterized by extremely rapid melting and re-solidification. This produces a metallurgy and corresponding mechanical proper- ties in the as-built condition which is similar to T6 heat-treated cast parts. Therefore, such hardening heat treatments are not recommended for laser-sintered parts, but rather a stress re- lieving cycle of 2 hours at 300 °C (572 °F). Due to the layerwise building method, the parts have a certain anisotropy, which can be reduced or removed by appropriate heat treatment – see Technical Data for examples.

Technical Data / /

Typical achievable part accuracy [1] [2] ⊕ 100 µm
Smallest wall thickness [1] [3] approx. 0.3 – 0.4 mm
approx. 0.012 – 0.016 inch
Surface roughness, as built, cleaned [1] [4] Ra 6 – 10 µm, Rz 30 – 40 µm Ra 0.24 – 0.39 x 10-³ inch Rz 1.18 – 1.57 x 10-³ inch
– after micro shot-peening Ra 7 – 10 µm, Rz 50 – 60 µm Ra 0.28 – 0.39 x 10-³ inch Rz 1.97 – 2.36 x 10-³ inch
Volume rate [5] 7.4 mm³/s (26.6 cm³/h)
1.6 in³/h
  1. These properties were determined on an EOSINT M 270.
  2. Based on users’ experience of dimensional accuracy for typical geometries. Part accuracy is subject to appro- priate data preparation and post-processing, in accordance with EOS training.
  3. Mechanical stability dependent on the geometry (wall height etc.) and application
  4. Due to the layerwise building, the surface structure depends strongly on the orientation of the surface, for example sloping and curved surfaces exhibit a stair-step effect. The values also depend on the measurement method used. The values quoted here given an indication of what can be expected for horizontal (up-facing) or vertical surfaces.
  5. The volume rate is a measure of the building speed during laser exposure. The overall building speed is de- pendent on the average volume rate, the time required for coating (depends on the number of layers) and other factors, e.g., DMLS settings.

Physical and chemical properties of the parts / /

Material composition Al (balance)
Si (9.0 – 11.0 wt-%)
Fe (◦ 0.55 wt-%)
Cu (◦ 0.05 wt-%)
Mn (◦ 0.45 wt-%) Mg (0.2 – 0.45 wt-%)
Ni (◦ 0.05 wt-%)
Zn (◦ 0.10 wt-%)
Pb (◦ 0.05 wt-%)
Sn (◦. 0.05 wt-%)
Ti (◦ 0.15 wt-%)
Relative density approx. 99.85%
Density 2.67 g/cm³
0.096 lb/in³

Mechanical properties of the parts / /

As built Heat treated [9]
Tensile strength [6]
– in horizontal direction (XY) 460 ⊕ 20 MPa
66.7 ⊕ 2.9 ksi
345 ⊕ 10 MPA
50.0 ⊕ 1.5 ksi
– in vertical direction (Z)
Yield strength (Rp 0.2 %) [6]
– in horizontal direction (XY) 270 ⊕ 10 MPa
39.2 ⊕ 1.5 ksi
230 ⊕ 15 MPa
33.4 ⊕ 2.2 ksi
– in vertical direction (Z) 240 ⊕ 10 MPa
34.8 ⊕ 1.5 ksi
230 ⊕ 15 MPa
33.4 ⊕ 2.2 ksi
Modulus of elasticity
– in horizontal direction (XY) 75 ⊕ 10 GPa
10.9 ⊕ 0.7 Msi
70 ⊕ 10 GPa
10.2 ⊕ 0.7 Msi
– in vertical direction (Z) 70 ⊕ 10 GPa
10.2 ⊕ 0.7 Msi
60 ⊕ 10 GPa
8.7 ⊕ 0.7 Msi
Elongation at break [6]
– in horizontal direction (XY) (9 ⊕ 2) % 12 ⊕ 2%
– in vertical direction (Z) (6 ⊕ 2) % 11 ⊕ 2%
Hardness [7] approx.119 ⊕ 5 HBW
Fatigue strength [1] [8]
– in vertical direction (Z) approx. 97 ⊕ 7 MPa
approx. 14.1 ⊕ 1.0 ksi
  • Mechanical strength tested as per ISO 6892-1:2009 (B) annex D, proportional specimens, specimen diameter 5 mm, original gauge length 25 mm (1 inch).
  • Hardness test in accordance with Brinell (HBW 2.5/62.5) as per DIN EN ISO 6506-1. Note that measured hard- ness can vary significantly depending on how the specimen has been prepared.
  • Fatigue test with test frequency of 50 Hz, R = -1, measurement stopped on reaching 5 million cycles without fracture.
  • Stress relieves anneal for 2 h at 300 °C (572 °F).
  • These properties were determined on an EOSINT M 280-400W. Test parts from following machine type EOS M 290-400W correspond with these data.

Thermal properties of the parts / /

As built [1] Heat treated [1] [9]
Thermal conductivity (at 20 °C)
⦁ in horizontal direction (XY) approx. 103 ⊕ 5 W/m°C approx. 173 ⊕ 10 W/m°C approx. 173 ⊕ 10
⦁ in vertical direction (Z) approx. 119 ⊕ 5 W/m°C approx. 173 ⊕ 10 W/m°C Specific heat capacity

Aluminum Alsi10mg Services at Fathom / /

Fathom is fully versed in using Alsi10mg for leveraging Direct Metal Laser Sintering (DMLS) process for aluminum parts and prototypes. Use Fathom’s SmartQuote online platform to get a quote in as fast as 1 hour. Whether you need DMLS or another manufacturing service, Fathom’s DMLS lead times are as follows:

  • DMLS Parts in As Soon As 3 Days
  • Complex Metal Parts from A Variety of Alloys Including Alsi10mg
  • Functional Metal Prototypes & End-Use Parts

Alsi10mg FAQ / /

Q: Does Fathom work with Alsi10mg?

A: Yes, Fathom works with Aluminum.

Q: What is Alsi10mg?

A: Alsi10mg is a common type of casting alloy that has good casting properties. Aluminum is a good match for parts that have thin walls and complex geometries.

Q: Is Fathom ISO certified?

A: Fathom’s certifications include ISO 9001:2015, ISO 9001:2015 Design, and ISO 13485:2016.

Q: Is Fathom ITAR certified?

A: Fathom is ITAR certified.

Q: Is Fathom AS9100:2016 certified?

A: Yes, Fathom is AS9100:2016 certified.

Q: Is Fathom NIST 800-171 certified?

A: Fathom’s certifications include NIST 800-171.

Q: What is AlSi10Mg used for?

A: AlSi10Mg is used to make ductwork, tools, engine parts, housings, etc.

Q: Can you weld AlSi10Mg?

A: Yes, AlSi10Mg can be welded without adding filler material. The resulting weld has added strength.

Q: Can AlSi10Mg be anodized?

A: AlSi10Mg should not be anodized.

Q: What metal is AlSi?

A: AlSi is a synthesized combination of aluminum and silicon.

Aluminum Alsi10mg and DMLS Metal 3D Printing Quotes / /

Ready to estimate costs or get a quote on your DMLS 3D printing project? Get started by submitting your file using the SmartQuote online platform. Our team will provide you with a quote within 24 hours.

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