Picking the wrong supplier doesn't just cost you money on a single part. It costs you schedule, rework, and sometimes the whole program.
AS9100 proves they've got a quality management system. Nadcap means they've passed a third-party audit on their specific processes—and Nadcap auditors don't mess around. ISO 13485 tells you they know medical device manufacturing. ITAR registration means they're cleared to handle defense data and controlled materials. Each one says something different. Most shops pick and choose based on which customers keep them busiest. You need to understand what each actually means for your specific program.
Ask for powder lot tracking and complete cert packages. You want to know the exact powder batch, chemistry test results, and particle size distribution. Anything less is a red flag.
How do they qualify new builds? Get their Ppk data. Ppk above 1.33 is the minimum bar for high-reliability work. If they can't hand you documented, statistically valid process data, they're not serious.
Do they do in-house HIP, machining, and NDT or do they outsource? Every step that goes outside adds complexity, lag time, and traceability gaps. Find out who handles what.
Ask for their actual current backlog, not marketing lead times. Most shops will tell you what you want to hear. Dig deeper. Ask about queue depth and how they handle expedites without cutting corners.
If a shop can't explain their process in plain terms, that's a problem. You want someone who can walk you through how they design builds, nest parts, prepare powder, run printers, and finish parts. Vague answers like "our engineer handles that" should push you to dig deeper. If they won't provide material certs, ever, move on. If they've never heard of AS9100 and you're doing aerospace work, that's a hard stop. And if they promise the moon—three-week lead time, zero scrap, perfect tolerances—they're setting you up for disappointment. Good suppliers push back when specs or timelines don't make sense. That honesty is worth more than a sales pitch.
Once you've narrowed it down, prioritize capability and schedule over cost. A vendor who can deliver the right part on time is worth more than the cheapest bid that shows up late and out of spec. Get everything in writing—lead time, quality requirements, material specifications, post-processing, inspection methods. Written terms protect both sides.
Start small. Your first order shouldn't be your biggest. Run 5 parts through the system first and see how they handle design review, build execution, inspection, and delivery. If that goes well, scale up. The best vendor relationships aren't transactional—they're partnerships. A vendor who knows your application and your constraints will make better decisions and flag risks before they become problems.
You've done the homework. You know what questions to ask and what red flags to watch for. Let us connect you with a certified facility that fits your requirements—no guessing, no hoping. One partner. One PO.
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