Your material choice—resin, nylon, metal, or composite—directly controls your profit margin, lead times, and customer satisfaction. Get this wrong, and you'll either price yourself out of work or damage your reputation on quality. Here's how to navigate the real tradeoffs.
Understanding the Cost Structure of Common Materials
Material costs don't operate in a vacuum. A kilogram of SLS nylon runs $15–$25, but that's only part of the story. You're also paying for machine time, post-processing labor, and support removal—all vary by material. Stereolithography resin prints are cheaper upfront ($8–$15/kg), but UV curing, washing, and support cleanup add 2–4 hours per batch. FDM thermoplastics like ABS or PLA cost $10–$20/kg but have the highest scrap rates due to warping and failed prints.
For metal printing, expect $40–$80 per kilogram for titanium or aluminum, with post-processing (heat treatment, machining) adding another 30–60% to total job cost. The jump is steep, but metal opens premium market segments willing to pay 3–5x markup.
Quality Requirements Drive Material Selection
Not every customer needs aerospace-grade precision. A product designer prototyping consumer goods tolerates ±0.5mm variation; a medical device manufacturer does not. Before selecting material, nail down your customer's actual spec—it usually determines cost more than anything else.
Nylon and SLS excel for functional prototypes and low-volume production (500–5,000 units). You get decent strength-to-weight ratios and fast turnaround (3–7 days) without premium pricing. Resin prints deliver superior surface finish and detail but are brittle under stress—ideal for display models, dental patterns, and jewelry, not load-bearing parts.
Metal printing demands the highest precision and consistency. Your customer will expect tighter tolerances (±0.1–0.3mm), post-processing in a controlled environment, and often third-party certification or material testing. That customer also pays accordingly—typically 2–3x the raw material cost for labor and validation.
The Lead Time vs. Cost Trade-off
Faster output usually means lower material efficiency and higher labor. Here's the practical reality:
- FDM (ABS/PLA): 1–3 days, 40–50% post-processing labor, ~$2–$8/hour material cost on small parts
- SLS (nylon): 3–7 days, minimal post-processing, ~$5–$15/hour material cost
- Stereolithography (resin): 2–4 days, 2–3 hours manual finishing, ~$3–$12/hour material cost
- Metal (DMLS/SLM): 5–14 days, extensive finishing and testing, ~$15–$40/hour material cost
If your shop runs at 70% capacity, offering 24-hour turnaround on small resin prints can justify a 20–30% premium over standard 3-day service. Metal jobs, however, rarely compress below 7 days without jeopardizing quality—customers know this.
Building a Profitable Material Strategy
Start by analyzing your current order mix. Are you getting more rapid prototypes or end-use parts? More cosmetic or functional? Your answer should guide equipment investment and material inventory.
For business growth, specialize. A shop excelling at precision resin prints for jewelry and dental will command better margins ($45–$75/hour) than a generalist doing basic FDM. The same applies to metal: one trusted metal printer with documented quality beats three mediocre ones.
Stock materials strategically. Buy nylon and standard resins in bulk (25–50kg drums) to capture 10–15% volume discounts. Metal powders degrade over time, so order smaller quantities (2–5kg) more frequently unless you have consistent demand. Post-processing supplies—support material, cleaning agents, sanding discs—should be on hand to avoid bottlenecks.
Listing your services on Mercoly helps you reach customers actively searching for specific materials and capabilities, making it easier to win leads aligned with your specialty and pricing model.
Frequently Asked Questions
Q: Should I invest in metal printing if I only get a few metal jobs per year? Unless you can generate consistent monthly metal orders (8+), outsource metal work initially. The machine, powder, and post-processing setup costs $80–$150K upfront; you need $4–$6K monthly revenue just to break even.
Q: How do I know if a customer's tolerance requirement justifies a material upgrade? Ask directly: "What's your required tolerance?" If they say "as close as possible" without specifics, they don't actually need tight tolerances. Most prototypes live fine with ±0.5mm; only production and functional parts demand ±0.2mm or tighter.
Q: Can I mix materials on one job to reduce cost? Yes—use SLS nylon for structural parts and resin for fine details if your post-processing workflow supports it. Hybrid printing is underused and can drop overall costs 15–25% while improving lead times.
Start auditing your material waste this week, then align your pricing with your actual cost structure.