The hype around 3D printing has faded. What's left — for real manufacturers — is a serious question: which technology actually works for production?
Over the past decade, four additive manufacturing (AM) technologies have emerged as the workhorses of industrial production: FDM (Fused Deposition Modeling), SLA (Stereolithography), SLS (Selective Laser Sintering), and MJF (Multi Jet Fusion). Each has a distinct cost profile, material set, accuracy envelope, and surface finish.
This guide provides a head-to-head technical comparison with real numbers — Ra values, layer thickness, tensile strength, cost per cubic centimeter, and typical lead times. No marketing fluff.
How it works: A thermoplastic filament is melted through a heated nozzle and deposited layer-by-layer onto a build plate.
Maturity: Oldest and most widely adopted AM technology (patented 1989, expired 2009).
Industrial players: Stratasys (Fortus series), Markforged (for continuous fiber), Ultimaker S5/S7 (prosumer to production).
Key differentiator: Low machine cost and unlimited build volume potential (parts up to 1m+ possible on large-format machines).
How it works: A UV laser cures liquid photopolymer resin layer by layer, either from the top down (free-surface) or bottom-up (DLP/LCD variants).
Maturity: Also dates to the mid-1980s, but radically improved in the last 5 years with engineered resins.
Industrial players: 3D Systems (ProX/SLA series), Formlabs (Form 3/4), UnionTech.
Key differentiator: Best-in-class surface finish and detail resolution among polymer AM.
How it works: A CO₂ laser fuses nylon (PA) or TPU powder particles together, layer by layer. Unfused powder acts as support.
Maturity: Proven in production since the 1990s, heavily adopted for end-use parts.
Industrial players: EOS (P/PRO series), Farsoon, 3D Systems (sPro), Sinterit (desktop SLS).
Key differentiator: No support structures needed, isotropic mechanical properties, excellent material reusability.
How it works: HP's proprietary technology — an inkjet array deposits fusing and detailing agents onto a powder bed, then IR lamps fuse the entire layer at once.
Maturity: Introduced 2016, rapidly matured to production-grade in 2020+.
Industrial players: HP (Jet Fusion 5200/5400 series), essentially proprietary to HP.
Key differentiator: Fastest build speed in powder-bed fusion, consistent mechanical properties across the build volume.
| Property | FDM | SLA | SLS | MJF |
|---|---|---|---|---|
| Common Materials | PLA, ABS, PETG, PC, Nylon, PEEK, PEKK, ULTEM | Standard resin, Tough, Durable, Flexible, Castable, Dental, Clear | PA11, PA12, PA6, TPU, PP, PA-GF, PA-CF | PA12, PA11, TPU, PP, PA-GF |
| Material Cost (USD/kg) | $20–80 (standard), $80–300 (engineering) | $50–200 (standard), $200–500 (engineering) | $50–120 | $60–120 |
| Tensile Strength (MPa) | 30–80 (unreinforced), 80–200 (CF-reinforced) | 40–70 (standard), 60–90 (engineering) | 45–55 (PA12) | 45–50 (PA12) |
| Elongation at Break (%) | 5–40 (varies by material) | 5–25 | 15–25 (PA12) | 15–20 (PA12) |
| Heat Deflection Temp (0.45 MPa) | 55–160 °C (PC/PEEK) | 45–95 °C (standard), 150–220 °C (high-temp) | 95–120 °C (PA12) | 95–105 °C (PA12) |
| Chemical Resistance | Good (depends on material) | Poor to Fair (resin degrades) | Excellent (nylon-based) | Excellent (nylon-based) |
| UV Stability | Fair (ABS degrades) | Poor (yellowing) | Good | Good |
| Recyclability | 100% (failed prints re-grind) | Resin waste hard to recycle | ~50–70% powder reuse | ~60–80% powder reuse |
| Material Variety | ★★★★★ (100+ materials) | ★★★★ (40+ resins) | ★★★ (10–15 powder grades) | ★★★ (8–12 HP-certified) |
Key takeaway: FDM wins on material breadth (especially high-temp like PEEK/ULTEM). SLS/MJF dominate for end-use nylon parts. SLA is best for specialty applications (dental, jewelry, castable).
| Tolerance Class | FDM | SLA | SLS | MJF |
|---|---|---|---|---|
| Standard (± mm) | ±0.3–0.5 mm (first 100 mm) | ±0.1–0.2 mm (first 100 mm) | ±0.15–0.3 mm (first 100 mm) | ±0.15–0.25 mm (first 100 mm) |
| Precision (± mm) | ±0.2–0.3 mm | ±0.05–0.1 mm | ±0.1–0.15 mm | ±0.1–0.15 mm |
| Repeatability | Moderate (thermal drift) | Good (stable process) | Good (powder compaction affects Z) | Very Good (closed-loop inkjet) |
| Best-for | Non-critical jigs, fixtures | Fit-checks, master patterns | Functional assemblies | Production parts |
| Technology | Minimum Layer (μm) | Typical Production Layer (μm) | Maximum Layer (μm) |
|---|---|---|---|
| FDM | 50 (0.002") | 150–200 (0.006–0.008") | 400 (0.016") |
| SLA | 25 (0.001") | 50–100 (0.002–0.004") | 200 (0.008") |
| SLS | 60 (0.0024") | 100–120 (0.004–0.005") | 180 (0.007") |
| MJF | 80 (0.003") | 80 (fix — HP uses fixed layer) | 80 |
| Technology | As-Printed Ra (μm) | After Minimal Post-Processing | After Full Finishing |
|---|---|---|---|
| FDM | 10–25 (visible layer lines) | 5–12 (light sanding) | 0.8–3.0 (primer + paint) |
| SLA | 0.8–2.5 | 0.4–1.0 (wet sanding) | 0.1–0.4 (polished) |
| SLS | 6–12 (grainy, matte texture) | 3–8 (tumbling) | 1–3 (vapor smoothing) |
| MJF | 6–10 (smoother than SLS) | 3–6 (media blasting) | 1–2.5 (vapor smoothing) |
Key takeaway: SLA is the undisputed champion for surface finish (Ra < 1 μm polished). FDM's visible layer lines mean it requires heavy post-processing for appearance. SLS/MJF have a characteristic "powder finish" — functional but not cosmetic without treatment.
| Property | SLS PA12 | MJF PA12 | FDM Nylon (Markforged Onyx) | SLA Tough Resin |
|---|---|---|---|---|
| Tensile Strength (MPa) | 48 | 48 | 50–60 (with CF) | 45–55 |
| Young's Modulus (GPa) | 1.8 | 1.7–1.8 | 3–5 (CF-filled) | 1.8–2.5 |
| Elongation at Break (%) | 18 | 16 | 12–20 | 10–20 |
| Impact Strength (Izod, J/m) | 70 | 65 | 45–55 | 40–60 |
| Z-direction Strength (% of XY) | 85–95% | 85–90% | 50–70% (layer adhesion) | 70–85% |
The Z-direction weakness is critical: FDM's interlaminar strength is notoriously poor. For parts loaded perpendicular to build layers, SLS and MJF are significantly stronger.
| Cost Driver | FDM (Stratasys) | SLA (Formlabs) | SLS (EOS P396) | MJF (HP 5200) |
|---|---|---|---|---|
| Machine Cost (USD) | $10K–$250K | $3K–$100K | $50K–$500K | $150K–$350K |
| Material Cost per Part | $1.50–$4.00 | $3.00–$10.00 | $2.50–$5.00 | $2.50–$4.00 |
| Machine Hourly Rate | $3–$8 | $2–$6 | $8–$15 | $10–$18 |
| Labor (Post-Processing) | 5–15 min (support removal) | 10–20 min (wash + cure) | 15–30 min (blast + clean) | 10–20 min (blast + clean) |
| Total Cost per Part (10 qty) | $3–$12 | $8–$20 | $6–$15 | $7–$14 |
| Technology | Cost per cm³ (Low Volume, 1–10 pcs) | Cost per cm³ (Medium Volume, 100–500 pcs) | Cost per cm³ (High Volume, 1000+ pcs) |
|---|---|---|---|
| FDM (standard) | $0.05–$0.20 | $0.04–$0.15 | $0.03–$0.10 |
| SLA (standard) | $0.15–$0.40 | $0.10–$0.25 | $0.08–$0.20 |
| SLS (PA12) | $0.12–$0.30 | $0.08–$0.18 | $0.06–$0.12 |
| MJF (PA12) | $0.14–$0.28 | $0.08–$0.15 | $0.05–$0.10 |
Note: These are estimates based on US/European service bureau pricing. In-house printing can reduce costs by 30–60%, excluding machine amortization.
| Volume (units) | FDM | SLA | SLS / MJF | Injection Molding |
|---|---|---|---|---|
| 1–10 | Fastest, cheapest | Fast but expensive | Fast, moderate cost | Prohibitively expensive (tooling $2K–$50K) |
| 100–500 | Still viable | Becoming expensive | Sweet spot for powder bed | Possible for soft tooling |
| 1,000–5,000 | Only with large build | Not economical | Viable for complex parts | Hands-down winner |
| 10,000+ | Not practical | Not practical | Niche only | Dominates |
The crossover point is typically around 500–1,000 units for simple parts and 1,500–3,000 units for complex geometries. Above that, injection molding is always cheaper on a per-part basis.
| Technology | Single Part | 10 Parts (one build) | 50 Parts |
|---|---|---|---|
| FDM | 4–8 hours | 4–8 hours (same height) | 12–24 hours (multiple builds) |
| SLA | 3–6 hours | 3–6 hours (if same Z-height) | 6–12 hours |
| SLS | 8–14 hours | 8–12 hours (fully packed) | 10–14 hours (fully packed) |
| MJF | 6–10 hours | 6–8 hours (fully packed) | 8–10 hours (fully packed) |
Why MJF is faster: HP's technology fuses an entire layer at once (via IR lamps) rather than tracing each feature with a laser. This means build time is almost independent of part count — as long as parts fit in the build volume, adding more costs almost nothing in time.
| Stage | FDM | SLA | SLS | MJF |
|---|---|---|---|---|
| File preparation & slicing | 15–30 min | 15–30 min | 30–60 min (nesting) | 30–60 min (nesting) |
| Printing | 4–24 hrs | 3–12 hrs | 8–14 hrs | 6–10 hrs |
| Support removal / depowdering | 5–30 min | 5–10 min | 10–20 min | 10–20 min |
| Cleaning & inspection | 5–15 min | 10–20 min (wash + UV cure) | 10–15 min (bead blast) | 10–15 min (bead blast) |
| Total (typical) | 5–25 hrs | 4–13 hrs | 10–16 hrs | 7–12 hrs |
Reality check: These are "clean room" times. In a real production environment, add:
FDM: ████████████████████░░░░░░░░░░░░░░░░░░ Visible layer lines, rough texture
SLA: ████████████████████████████████████████ Smooth, almost injection-mold quality
SLS: ██████████████████████░░░░░░░░░░░░░░░░░░ Matte, grainy powder finish
MJF: ████████████████████████░░░░░░░░░░░░░░░░ Matte, slightly smoother than SLS| Process | FDM | SLA | SLS | MJF |
|---|---|---|---|---|
| Manual sanding | ✅ Necessary | ✅ Optional (for mirror finish) | ✅ Possible | ✅ Possible |
| Vapor smoothing | ✅ (ABS/ASA with acetone) | ❌ | ✅ (Burnishing machine) | ✅ (Burnishing machine) |
| Primer + paint | ✅ Required for good looks | ✅ Enhances | ✅ Good results | ✅ Good results |
| Tumbling / vibratory | ⚠️ Limited (layer separation risk) | ✅ | ✅ Excellent | ✅ Excellent |
| CNC machining | ✅ After printing | ⚠️ (requires heat treat) | ✅ | ✅ |
| Electroplating | ⚠️ (layer lines visible) | ✅ Smooth base | ✅ | ✅ |
| Dyeing | ❌ (not practical) | ❌ | ✅ Excellent (black only for MJF) | ✅ |
Pro tip for SLS/MJF: A 30-minute vibratory tumbling with ceramic media can reduce surface roughness from ~8 μm Ra to ~3 μm Ra. For production parts, this is often sufficient without any further finishing.
| Application | Why FDM? | Typical Industry |
|---|---|---|
| Jigs & fixtures | Low cost, can reinforce with CF | Automotive, aerospace |
| Manufacturing aides | Large format available | All manufacturing |
| Functional prototypes | Wide material selection | R&D, design validation |
| End-use parts (low volume) | 100+ materials to choose from | Industrial equipment |
| Tooling — thermoform/vacuum molds | Heat-resistant materials (PC, PEKK) | Packaging, automotive |
Not good for: Fine-detailed parts, threads, snap-fits, cosmetic surfaces, parts needing water-tightness without post-processing.
| Application | Why SLA? | Typical Industry |
|---|---|---|
| Master patterns for casting | Burnout resins for investment casting | Jewelry, dental |
| Visual prototypes | Smooth surface = realistic look | Consumer products |
| Fit verification | High accuracy (±0.05 mm) | Automotive (interior trim) |
| Dental models, surgical guides | Biocompatible resins | Medical, dental |
| Microfluidics, hearing aids | Ultra-fine detail | Medical devices |
Not good for: Structural/load-bearing parts, outdoor exposure, high-temperature environments, parts requiring high impact strength.
| Application | Why SLS? | Typical Industry |
|---|---|---|
| End-use production parts | Strong, isotropic properties | Automotive (ducting, clips) |
| Complex ducting & manifolds | No supports needed, internal channels | Aerospace, motorsport |
| Living hinges, snap-fits | Excellent fatigue resistance in PA12 | Consumer goods |
| Small-to-medium batch production | Cost-effective at 100–500 units | Industrial |
| Functional prototypes of production parts | Same material as production (PA12/PA11) | Manufacturing |
Not good for: Large flat surfaces (warp risk), very large parts (>500 mm), food contact (porous surface), parts requiring high heat deflection (>120 °C).
| Application | Why MJF? | Typical Industry |
|---|---|---|
| Production parts at scale | Fastest build time for high volumes | Automotive, electronics |
| Complex assemblies | Superior dimensional consistency | Robotics, drones |
| Parts with fine features | Good Z-strength (85–90%) | Medical devices |
| Where consistent mechanical properties matter | HP's closed-loop process | Aerospace (non-critical) |
| End-use parts ready within hours | Minimal post-processing | Manufacturing logistics |
Not good for: Very large parts (only 380 × 284 × 380 mm on 5200 series), parts needing high-temp resistance, colored parts (black only, or post-dyed), very low volumes (setup time is higher than SLS for 1–2 parts).
| Technology | Min Wall Thickness (mm) | Min Hole Diameter (mm) | Min Clearance (mm) | Recommended Layer Height (mm) |
|---|---|---|---|---|
| FDM | 0.8–1.2 | 2.0 | 0.5 | 0.15–0.25 |
| SLA | 0.3–0.5 | 0.5 | 0.1 | 0.05–0.10 |
| SLS | 0.5–0.7 | 0.8 | 0.3 | 0.10–0.12 |
| MJF | 0.5–0.7 | 0.8 | 0.3 | 0.08 |
| Mistake | Why It Fails | Solution |
|---|---|---|
| FDM: Walls too thin | Extrusion width can't resolve | Minimum 2× nozzle diameter (0.8 mm for 0.4 mm nozzle) |
| FDM: Sharp corners in Z | Stress concentration at layer interface | Add fillets (R ≥ 2 mm) |
| SLA: Designing for standard tolerances | Resin shrinkage on curing | Account for 0.5–1.0% shrinkage |
| SLS/MJF: Thin, tall features | Thermal warpage during cool-down | Avoid aspect ratios >10:1 unsupported |
| MJF: Packing too dense | Localized overheating from adjacent parts | Maintain 3–5 mm spacing between parts |
┌─────────────────────────────────────┐
│ What is your primary requirement? │
└──────────────────┬──────────────────┘
│
┌────────────────┼────────────────┐
▼ ▼ ▼
Low cost High detail End-use parts
/ prototyping / surface / production
│ │ │
▼ ▼ ▼
┌────────┐ ┌────────┐ ┌────────┐
│ FDM │ │ SLA │ │ Are they│
└────────┘ └────────┘ │ load- │
│ │ │ bearing?│
└───┬────┘
│
┌──────────────┴──────────────┐
▼ ▼
Yes, structural No, cosmetic
or non-critical
▼ ▼
┌────────┐ ┌────────┐
│ SLS │ │ MJF │
└────────┘ └────────┘| Scenario | Recommended Technology | Why |
|---|---|---|
| First prototype, need fast | FDM | Fastest setup, cheapest per part |
| Visual mockup for design review | SLA | Best surface, looks like final product |
| Functional test — mechanical load | SLS | True isotropic properties |
| Production run of complex parts (100–1000) | MJF | Fastest batch, consistent quality |
| High-temperature application (150 °C+) | FDM (PEEK/ULTEM) | Only option at this temp range |
| Dental/surgical/casting patterns | SLA | Only technology with appropriate resins |
| Living hinges, flexures | SLS (PA12) | Best fatigue life in polymer AM |
| Very large parts (>500 mm) | FDM (large-format) | Only practical option |
| Parts exposed to chemicals or outdoor | SLS/MJF (Nylon) | Chemical + UV resistance |
| Budget-constrained prototyping | FDM | Lowest entry cost (< $500 for a printer) |
| Technology | Est. % of Industrial AM Revenue | Growth Rate (YoY) |
|---|---|---|
| FDM | 35% | 8–12% |
| SLA | 20% | 10–15% (driven by dental/medical) |
| SLS | 25% | 12–18% (driven by production adoption) |
| MJF | 15% | 20–25% (fastest growing) |
| Other | 5% | — |
| Factor | FDM | SLA | SLS | MJF |
|---|---|---|---|---|
| Material range | ★★★★★ | ★★★★ | ★★★ | ★★★ |
| Surface quality | ★★ | ★★★★★ | ★★★ | ★★★½ |
| Accuracy | ★★½ | ★★★★★ | ★★★½ | ★★★★ |
| Mechanical strength | ★★★ (Z-direction weak) | ★★★ | ★★★★ | ★★★★ |
| Cost per part (single) | ★★★★★ | ★★★ | ★★★★ | ★★★½ |
| Cost per part (batch 100+) | ★★★ | ★★ | ★★★★ | ★★★★★ |
| Build speed | ★★★ | ★★★ | ★★★★ | ★★★★★ |
| Post-processing required | ★★★★★ (most) | ★★★★ | ★★★ | ★★★ |
| Ease of use | ★★★★★ | ★★★★ | ★★★ | ★★★½ |
| Z-direction isotropy | ★★ | ★★★ | ★★★★★ | ★★★★ |
| Max part size | 1000+ mm (large format) | 300–500 mm typical | 350–700 mm typical | 380 mm max |
| Machine entry cost | $200 (desktop)–$200K | $200 (DIY)–$100K | $10K (desktop)–$500K | $150K–$350K |
Last updated: June 4, 2026. Material properties based on manufacturer datasheets and independent testing. Prices reflect mid-2026 market averages and may vary by region and volume.