Metal 3D Printing Explained: Technologies, Uses, and What's Now Accessible

## Metal Printing Technologies **DMLS / SLM (Powder Bed Fusion)**: Industrial laser sintering of metal powder. Produces aerospace-grade parts in titanium, stainless steel, Inconel. Machines cost $200K–$1M+. **Binder Jetting**: Jets binder onto metal powder, then sinters in a furnace. Desktop Metal and ExOne lead this space. More accessible at $50K–$200K. **FDM-based Metal (Metal X, Studio System)**: Prints metal-filled filament, then debinds and sinters in a furnace. Markforged's Metal X starts around $100K. **Accessible Desktop Options**: - Bambu Lab + metal-fill PLA (stainless, copper, bronze appearances — not true metal) - Printing farms with FDM for tooling/patterns, then sand-casting in metal ## Common Materials | Metal | Applications | |-------|-------------| | 316L Stainless Steel | Medical, marine, food-safe | | Ti-6Al-4V Titanium | Aerospace, medical implants | | Inconel 625/718 | High-temp aerospace parts | | Aluminum (AlSi10Mg) | Lightweight structural | | Tool Steel (H13) | Injection mold inserts | | Copper | Heat exchangers, electronics | ## When to Use a Service Bureau For most makers and small businesses, outsourcing to a metal printing service bureau is more cost-effective than buying equipment. Services like Xometry, Shapeways, and 3DHubs offer: - Online quoting in minutes - DMLS, SLM, Binder Jetting options - Lead times of 5–15 business days - Parts from $50 for small components ## Use Cases - Aerospace brackets and ducts - Medical implants (hip/knee) - Jewelry in gold/silver/platinum - Industrial tooling - Motorsport components