3D Printing Materials -SLS (Selective Laser Sintering)

Material Selection Guide ▼

Nylon 12 (ALM RM650)

SLS Nylon 12 is our most popular LS material when it comes to rapid manufacturing. It is white in color and combines strength, durability and chemical resistance. Essentially producing strong, durable , end use prototype parts. SL parts are superior to FDM (Fused Deposition Modeling) parts in that they are less porous, more precise and have less noticeable build lines. LS systems build in .004-.006 inch layers while FDM layer thickness is between .007-.013 inches.


  • Manufacturing housings and enclosures
  • Creating Impellers and connectors
  • Function testing snap-fit designs
  • Direct Digital Manufacturing
  • Complex production of ductwork
  • Prototyping plastic parts

Nylon 11 (ALM FR106)

This Rapid Prototyping nylon material has certain additives in the raw material that allows it to pass aeronautic standard FAR25.853 smoke, flame, and toxicity tests. This material is ideal for Aeronautic applications and any other application that needs self extinguishing properties for rapid prototype parts or V0 flammability ratings. Flammability Test Results


  • Ideal for lenses and manufacturing packaging supplies
  • Water flow analysis
  • RTV molding and manufacturing patterns
  • Concept modeling
  • Wind tunnel testing
  • Manufacturing Quickcast patterns

3D systems A6 tool steel

A6 tool steel is ideal for rapid tooling applications and for clients who need metal prototype parts at a competitive rate. This rapid prototype metal material is actually a blend of stainless steel and bronze. A6 is great for producing rapid tooling inserts quickly and inexpensively. Typical lead times are between 4 and 8 days. Depending on the tolerances required, post machining may be needed. If this is the case then machining stock should be added the CAD drawings. .


  • Complex tooling inserts for injection molding & die casts
  • Conformal cooling or heating channels integrated into tool designs
  • Smaller and complex geometry metal parts
  • Low-volume metal part manufacturing

3D systems Castform

Castform is a wax infiltrated polystyrene prototype material used to fabricate master patterns made of wax for foundries. Prototype aluminum castings are the most popular for this material. Larger bulkier parts with complex geometry work best for this method of 3D printing using wax.


  • Complex investment casting patterns without tooling
  • Functions like foundry wax and is “foundry friendly”
  • Low residual ash content (less than 0.02%)
  • Short burnout cycle
  • Easy-to-process plastic
  • Good plastic powder recycle characteristics