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FDM vs SLA vs SLS vs MJF: Which 3D Printing Process Should You Choose?
Each 3D printing process has a sweet spot. Choosing the right one for your part can save you time, money and redesigns. Here is a practical comparison of the six industrial processes we run at Quick 3D in Malaysia.
The short answer
- FDM for strong functional prototypes, jigs, fixtures and large parts — fastest turnaround.
- SLA for fine detail, smooth surfaces and clear parts.
- SLS for complex, support-free nylon parts and the widest powder material range.
- MJF for consistent, production-grade nylon parts in batches.
- PolyJet for multi-colour, multi-material prototypes that look and feel real.
- Metal for high-strength metal parts with geometry that machining cannot make.
Side-by-side comparison
| Process | How it works | Best for | Example materials | Lead time from |
|---|---|---|---|---|
| FDM | Melts and extrudes thermoplastic filament layer by layer | Functional prototypes, jigs & fixtures, large parts | ABS, ASA, PC, carbon-fibre nylon, PEEK, ULTEM PEI | 1 day |
| SLA | A laser cures liquid resin layer by layer | Fine detail, smooth surfaces, clear parts, master patterns | Tough, rigid, clear, high-temperature and ESD resins | 3 days |
| SLS | A CO2 laser sinters nylon powder; no supports needed | Complex geometry, nested assemblies, durable nylon batches | PA11, PA12, glass- and carbon-filled nylon, PEEK 5100, TPU | 7 days |
| MJF | HP Multi Jet Fusion fuses powder with agents and heat | Isotropic production parts, enclosures, brackets | HP PA12, PA11, PA12 Glass Beads, TPU | 7 days |
| PolyJet | Jets micro-droplets of photopolymer and cures them with UV | Multi-colour, multi-material and overmoulded prototypes | VeroClear, Agilus rubber-like, Digital ABS Plus | 7 days |
| Metal | A laser fuses metal powder under inert gas (DMLS / SLM) | Lattices, internal channels, lightweight high-strength parts | Titanium Ti64, stainless 316L, AlSi10Mg, Inconel | 7 days |
Lead times are the fastest typical turnaround at Quick 3D; actual timing depends on part size, quantity and finishing.
When to choose FDM
FDM (Fused Deposition Modeling) is the workhorse of functional prototyping and factory tooling. It builds parts from engineering thermoplastics and composites, so parts are strong and durable rather than just visual models.
- You need a part quickly — FDM parts can be ready in as little as 1 day.
- You are making jigs, fixtures, end-of-arm tooling or large components.
- You need specific engineering materials such as carbon-fibre nylon, ESD-safe plastics, PEEK or ULTEM PEI.
Our prototyping and industrial FDM services achieve a dimensional accuracy of ± 0.3% (with a lower limit of ± 0.3 mm) at 50–300 μm layer heights. Visible layer lines are normal; annealing, media blasting and vapour smoothing can improve strength and finish.
When to choose SLA
SLA (stereolithography) produces the smoothest surfaces and finest details of the plastic processes, with an injection-moulded look. Choose it for tight-tolerance prototypes, intricate internal features, clear parts for flow visualisation, and master patterns for casting. SLA parts can be ready in as little as 3 days.
When to choose SLS or MJF
Both are powder-bed processes that need no support structures, so they excel at complex shapes, internal channels and nested assemblies, and at producing many parts in one build.
- Choose SLS for the widest material range — including PEEK 5100, glass- and carbon-filled nylons, polypropylene and castable polystyrene.
- Choose MJF for consistent, isotropic strength and fine detail across production batches in HP PA12, PA11, glass-bead PA12 or TPU.
When to choose PolyJet
PolyJet combines rigid, flexible, clear and coloured materials in a single print. It is ideal when a prototype must look and feel like the finished product — consumer electronics, overmoulded grips, clear lenses or anatomical models.
When to choose metal 3D printing
Choose metal printing when a part needs metal strength but has geometry that CNC machining or casting cannot produce: lattice structures, internal cooling channels and topology-optimised brackets. Post-processing such as stress-relief annealing and CNC machining of critical interfaces brings parts to final specification.
- Need it tomorrow, and strong? → FDM
- Need it smooth, detailed or clear? → SLA
- Complex nylon part or high-performance powder? → SLS
- Repeatable nylon parts in a batch? → MJF
- Need it to look like the real product? → PolyJet
- Needs to be metal? → Metal 3D printing
Frequently asked questions
Which 3D printing process is the cheapest?
For most simple prototypes FDM is usually the most economical, because it uses less expensive equipment and materials and needs little post-processing. For batches of small nylon parts, SLS or MJF can become cost-effective because many parts are printed in one build.
Which 3D printing process is the strongest?
For polymers, carbon-fibre reinforced FDM materials and SLS or MJF nylons produce strong functional parts. For the highest strength, metal 3D printing in titanium, stainless steel or Inconel is the best choice.
Which process gives the best surface finish?
SLA and PolyJet give the smoothest surfaces straight off the printer. FDM and powder-bed parts can be improved with post-processing such as media blasting and vapour smoothing.
How do I know which process my part needs?
Send us your 3D file and tell us how the part will be used. Our engineers will recommend the process, material and finish that fit your requirements and budget.
Not sure which option is right for your part?
Send us your 3D file or drawing. Our engineers will recommend the right process, material and cost.
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