ALM PA 640-GSL (PA12, SLS)
ALM · SLS powder
ALM's PA12 powder for Selective Laser Sintering.
ALM datasheet values, printed parts
Other PA12 grades and fills
Compare the PA12 products and conditions in the library; see the grade overview at PA12.
- HP PA 12 GB
- Farsoon FS3300PA-F
- Formlabs Nylon 12 GF
- Sinterit PA12 Smooth
- FR
- ESD
- Formlabs Nylon 12 Tough
- Evonik INFINAM PA 12 (VESTOSINT)
- Farsoon FS3401GB
- HP PA 12 S
- AL
- HP PA 12 FR
- Farsoon FS3300PA
- EOS PA 2210 FR
- Formlabs Nylon 12 White
- EOS Alumide
- HP PA 12
- EOS PA 2200
- EOS PA 2201
- EOS PA 2220 HighReuse
- EOS PA 2200 CarbonReduced
- ALM PA 640-GSL
- HP PA 12 W
- EOS PrimePart FR (PA 2241 FR)
- Formlabs Nylon 12
- EOS PA 3200 GF
- CF
Compare all 27 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
HP 3D High Reusability PA 12 GB · MJF powder | A 40% glass-bead-filled PA 12 for stiff, dimensionally stable parts with fine detail and repeatability. | — | 29 | 10 | — |
SLS powder | — | — | 36 | 5 | — |
Formlabs Nylon 12 GF Powder · SLS powder | A glass-filled PA12 powder for rigid, dimensionally stable parts under sustained loading and elevated temperatures. | — | 38 | 4 | — |
SLS powder | — | — | 38 | 4.6 | 76 Shore D |
Flame-retardant PA12 | Use for aircraft interiors, rail and electrical enclosures where V-0 / FAR 25.853 burn compliance is mandatory; slightly lower toughness. | 40 | 44 | 6 | 78 Shore D |
Electrically conductive / static-dissipative PA12 | Choose for electronics handling trays, fixtures and fuel-system parts needing controlled surface resistivity (10⁶–10⁹ Ω). | 41 | 45 | 7 | 78 Shore D |
Formlabs Nylon 12 Tough Powder · SLS powder | A ductile PA12 powder for accurate, impact-resistant parts with reduced warpage and economical powder reuse. | — | 42 | 25 | — |
SLS powder | — | 43 | 49 | 311 | 75 Shore D |
SLS powder | — | — | 44 | 9.3 | — |
HP 3D High Reusability PA 12 S (enabled by Arkema) · MJF powder | A high-reuse PA 12 grade for smooth surfaces, fine detail, and cost-efficient aesthetic production parts. | — | 45 | 12 | — |
Aluminium-filled PA12 | Metallic-look, stiff, easily tumbled/polished parts for tooling aids and design models; better heat conduction, low elongation. | — | 46 | 4 | 80 Shore D |
HP 3D High Reusability PA 12 FR (enabled by Evonik) · MJF powder | A halogen-free flame-retardant PA 12 with a smooth finish for safety-critical housings and production components. | — | 46 | 4.7 | — |
SLS powder | — | — | 46 | 36 | — |
SLS powder | — | — | 46 | 4 | — |
Formlabs Nylon 12 White Powder · SLS powder | A white, dyeable PA12 powder for high-contrast prototypes, medical models, and customer-facing end-use parts. | — | 47 | 8 | — |
SLS powder | — | — | 48 | 4 | 76 Shore D |
HP 3D High Reusability PA 12 (enabled by Evonik) · MJF powder | HP's flagship MJF nylon balances strength, ductility, detail, and powder efficiency for functional production parts. | — | 48 | 20 | — |
SLS powder | — | — | 48 | 18 | 75 Shore D |
SLS powder | — | — | 48 | 15 | 75 Shore D |
SLS powder | — | — | 48 | 10 | — |
SLS powder | — | — | 48 | 18 | — |
ALM PA 640-GSLThis page SLS powder | — | — | 49 | 3 | — |
HP 3D High Reusability PA 12 W · MJF powder | A white engineering PA 12 for strong functional parts that can remain white or take vibrant color finishes. | — | 49 | 17 | — |
SLS powder | — | — | 49 | 15 | — |
Formlabs Nylon 12 Powder · SLS powder | A versatile, biocompatible PA12 powder for dimensionally accurate functional prototypes and durable end-use parts. | — | 50 | 11 | — |
SLS powder | — | — | 51 | 9 | 80 Shore D |
Carbon-fibre reinforced PA12 | Highest stiffness-to-weight powder-bed nylon — for lightweight brackets, drone and motorsport parts; strongly anisotropic and brittle. | — | 72 | 4 | 83 Shore D |
What is ALM PA 640-GSL?
ALM PA 640-GSL is ALM's PA12 (GB+CF-filled) powder for Selective Laser Sintering on EOS FORMIGA P 110 / P 396 / P 500 / P 770. ALM PA 640-GSL has a tensile strength of 49 MPa (7.11 ksi), stronger than 53% of polymer grades. Elongation at break is 3% and the elastic modulus is 3.816 GPa (0.553 Msi). ALM PA 640-GSL has a density of 0.82 g/cm³ (0.0296 lb/in³), lighter than 83% of polymer grades.
Advantages
- Stiff — 3.816 GPa (0.553 Msi), better than 86% of polymer grades
- Lightweight — 0.82 g/cm³ (0.0296 lb/in³), better than 83% of polymer grades
Limitations
- Limited ductility — 3%, worse than 83% of polymer grades
About this powder
- Manufacturer
- ALM
- Product
- PA 640-GSL
- Base polymer
- PA12 — glass-bead and carbon-fibre filled
- Process
- Selective Laser Sintering (SLS)
- Printers
- EOS FORMIGA P 110 / P 396 / P 500 / P 770
- As-printed colour
- Gray — Dark gray; hollow glass sphere and carbon fiber filled
- Build envelope
- 340 × 340 × 600 mm. Usable part size depends on orientation, spacing and process allowances.
- Build atmosphere
- Inert atmosphere specified; confirm the gas and settings for the printer/material profile.
- Manufacturer data source
- ALM source reference
- FabDigit material reference
- Download reference PDF — FabDigit layout with ALM data and source attribution.
- Ordering
- Specify this powder in your quote notes for an availability review.
Choosing PA 640-GSL
A lightweight ALM/EOS PA12 filled with hollow glass spheres and carbon fibre for stiff, dimensionally stable SLS parts on the EOS P396.
- Consider it for
- Lightweight rigid housings · Dimensionally stable fixtures · High-detail, low-strain components exposed to heat
- Tradeoffs
- The hybrid filler raises stiffness while leaving very low elongation. It remains a filled nylon, not a metal or continuous-fibre laminate, and the EOS store lists only the P396 as suitable.
- Design and validation
- Avoid snaps and sharp notches, keep the process on the documented P396 route, and validate the actual load direction. Check that the unusually low density and filler description remain current at purchase.
- Finishing
- Dark gray is the as-printed surface and the row is not dyeable. Blasting or coating should be sampled because exposed filler and surface texture can affect appearance and adhesion.
- Before choosing
- Is a lightweight stiff filled nylon preferable to PA12-GF or an unfilled ductile grade? Is the EOS P396 process route available and acceptable for qualification?
Selection notes based on EOS Store PA 640 GSL product page. Published test results depend on the stated printer, orientation and conditioning. Compare material families · Choose a finishing route.
ALM PA 640-GSL properties
Typical values for ALM PA 640-GSL; review each property’s test condition. Only this product’s reported properties are shown; unreported properties are omitted. Bars are the position among polymer grades.
Mechanical3
ALM PA 640-GSL has a tensile strength of 49 MPa (7.11 ksi), stronger than 53% of polymer grades. Elongation at break is 3% and the elastic modulus is 3.816 GPa (0.553 Msi).
per EOS Store typical part properties
per EOS Store typical part properties
per EOS Store typical part properties
Thermal2
per EOS Store typical part properties
per EOS Store typical part properties
Physical1
ALM PA 640-GSL has a density of 0.82 g/cm³ (0.0296 lb/in³), lighter than 83% of polymer grades.
per EOS Store typical part properties
Use published values for design screening. Confirm the grade, build direction, conditioning and available lot documentation when quoting.
ALM PA 640-GSL — frequently asked
What is ALM PA 640-GSL used for?
A lightweight ALM/EOS PA12 filled with hollow glass spheres and carbon fibre for stiff, dimensionally stable SLS parts on the EOS P396. Consider it for lightweight rigid housings, dimensionally stable fixtures and high-detail, low-strain components exposed to heat. The hybrid filler raises stiffness while leaving very low elongation. It remains a filled nylon, not a metal or continuous-fibre laminate, and the EOS store lists only the P396 as suitable.
What should I validate before using ALM PA 640-GSL?
Avoid snaps and sharp notches, keep the process on the documented P396 route, and validate the actual load direction. Check that the unusually low density and filler description remain current at purchase. Is a lightweight stiff filled nylon preferable to PA12-GF or an unfilled ductile grade? Is the EOS P396 process route available and acceptable for qualification?
How can ALM PA 640-GSL be finished?
Dark gray is the as-printed surface and the row is not dyeable. Blasting or coating should be sampled because exposed filler and surface texture can affect appearance and adhesion.
Sources
Product values come from the selected manufacturer source and are normalised for comparison. Confirm the quoted process, build direction, conditioning and available lot documentation for the finished part.