Real Metal. Not Metal-Filled Plastic.
Metal 3D printing — also called Direct Metal Laser Sintering (DMLS) or Selective Laser Melting (SLM) — produces fully dense metal parts by fusing metal powder with a high-powered laser, layer by layer. The resulting parts have mechanical properties comparable to wrought or cast metal.
This isn’t metal-infused plastic. It’s not a metal-coated prototype. It’s actual metal — titanium, stainless steel, aluminum, Inconel, cobalt chrome — built to near-net shape and ready for machining, heat treatment, and end-use deployment.
How Metal 3D Printing Works
- A thin layer of metal powder (20–60 microns) is spread across the build platform
- A high-powered fiber laser (200–400W+) selectively melts the powder according to the part geometry
- The platform drops by one layer (typically 20–50 microns), and fresh powder is spread
- The process repeats — hundreds or thousands of layers build the final part
- Post-processing: stress relief, support removal, heat treatment, CNC finish machining as required
Build times are measured in hours to days. A small bracket might take 4–8 hours. A complex aerospace component might take 40+ hours. This is not a rapid prototyping process in the traditional sense — it’s a manufacturing process for parts that can’t be made any other way.
When Metal 3D Printing Makes Sense
Choose metal AM when:
- Geometry can’t be machined — internal cooling channels, organic/topology-optimized shapes, lattice structures. If a 5-axis CNC can’t reach it, metal AM can build it.
- Material is exotic or expensive — titanium, Inconel, cobalt chrome. Metal AM wastes very little material (buy-to-fly ratio) compared to machining a billet.
- Weight reduction is critical — topology optimization + metal AM can reduce part weight by 40–60% while maintaining strength. Aerospace and motorsport live here.
- Quantity is low — tooling-free process. One part or fifty parts, the unit economics scale differently than casting or forging.
- Lead time beats traditional methods — no tooling procurement. Design to part in 1–3 weeks vs. 8–16 weeks for investment casting.
Common applications:
- Aerospace brackets, ducting, and structural components (Ti-6Al-4V)
- Conformal cooling channels in injection mold tooling (maraging steel)
- Medical implants — hip cups, spinal cages, cranial plates (Ti-6Al-4V ELI, CoCr)
- Turbine components and heat exchangers (Inconel 625/718)
- Motorsport and performance automotive components
- Tooling inserts with internal cooling that cut cycle times by 30–50%
Available Metals
| Material | Key Properties | Typical Applications |
|---|---|---|
| Ti-6Al-4V (Titanium) | Highest strength-to-weight ratio, biocompatible, corrosion resistant | Aerospace structural, medical implants, motorsport |
| 316L Stainless Steel | Corrosion resistant, good ductility, cost-effective | Marine, food processing, general engineering |
| 17-4 PH Stainless | High strength, hardenable, good corrosion resistance | Aerospace, defense, industrial machinery |
| Inconel 625 | Extreme temperature resistance (up to 980°C), corrosion resistant | Turbine components, exhaust systems, chemical processing |
| Inconel 718 | High strength at elevated temperatures, weldable | Jet engine components, nuclear, oil & gas |
| AlSi10Mg (Aluminum) | Lightweight, good thermal conductivity | Heat sinks, automotive, drone structures |
| Maraging Steel (MS1) | Very high hardness after aging, excellent machinability | Injection mold tooling with conformal cooling |
| CoCr (Cobalt Chrome) | Biocompatible, high hardness, wear resistant | Dental, medical implants, turbine blades |
What Metal AM Is NOT Good For
Honest assessment:
- Large, simple parts — if it’s a rectangular bracket that can be waterjet-cut from plate, don’t 3D print it. CNC is faster and cheaper.
- High volumes — above a few hundred parts, casting or forging will beat metal AM on unit cost every time.
- Tight tolerances without post-machining — as-printed tolerance is typically ±0.1–0.2mm. Critical surfaces need CNC finishing.
- Smooth surface finish — as-printed surfaces are rough (Ra 6–15μm). Functional or cosmetic surfaces require machining, polishing, or bead blasting.
- Cost-sensitive applications — metal AM is expensive. A small part might run $200–500. A large complex component can be $2,000–10,000+. If the geometry doesn’t demand it, traditional manufacturing is almost always cheaper.
How PartSnap Delivers Metal AM
Metal 3D printing requires significant expertise in design, orientation, support strategy, and post-processing. We provide:
- Design for Additive Manufacturing (DfAM) — optimizing your part for the metal AM process. This isn’t optional — a part designed for CNC machining will fail or cost 3x more if printed without modification.
- Process selection — is metal AM actually the right choice? We’ll tell you honestly if CNC, casting, or sheet metal makes more sense for your application.
- Production management — we work with qualified metal AM facilities and manage the full process: build, stress relief, heat treatment, finish machining, inspection, and delivery.
- Material certification — mill certs, material test reports, and dimensional inspection as required for your industry.
Get a Metal 3D Printing Quote
Upload your STEP or STL file and tell us about the application — material, quantity, critical dimensions, and any certifications required. We’ll provide a quote and an honest recommendation on whether metal AM is the right path.
info@partsnap.com · 214.449.1455