A few years ago, the only question most procurement managers asked was, “Can you make this part?” Today the conversation almost always turns to location. Is it better to source zamak die casting parts from China or Vietnam? We hear this so often at STICK INDUSTRY that we figured it’s time to write down what we tell clients face to face.
The short answer: use both.
It sounds simple, but the reasoning runs deep. We run two parallel factories – one in Xiamen, China, the other in Hanoi, Vietnam. Underneath the obvious marketing pitch, there’s a solid procurement logic that more brands are starting to adopt. TOTO and Kohler certainly have
The China-Vietnam Equation
For decades, anyone ordering precision zinc die casting components defaulted to China. That still makes sense for a lot of reasons. The tooling talent around Xiamen, the speed of prototyping, the sheer density of suppliers for everything from raw Zamak ingots to custom plating chemicals – it’s hard to replicate overnight. When a client sends us a complex faucet body with internal channels and expects a mirror chrome finish that’ll pass 200-hour salt spray, our Xiamen engineering team digs in. That’s their home turf.
But then tariffs happened. And shipping costs. And a sudden desire from every Western brand to have a backup plan. Vietnam entered the picture. Our Hanoi facility started as a way to handle overflow. Now it’s the primary source for a good chunk of our U.S.-bound orders. Zamak die casting in Vietnam isn’t a novelty anymore – it’s a tariff workaround that actually works.
Here’s the thing buyers don’t always realize: you don’t have to choose. The cleverest procurement strategies we see today treat these two locations as a single supply chain, not competing ones.
What China Does Best
Walk through our Xiamen plant and you’ll see why experienced OEMs still start their R&D here. The engineers who design the molds have probably been working with zamak die casting alloys since before the term “supply chain resilience” existed. They know how to tweak a gate location so that the chrome plating won’t bubble six months later. That kind of instinct matters when you’re launching a premium lock series or a medical housing.
We keep our advanced prototyping, toolmaking, and the more demanding finishing lines in Xiamen. The electroplating line there runs bright nickel, satin chrome, and tri-layer copper-nickel-chrome systems that make bathroom fittings look flawless. When a European buyer sends us a new design and says, “I need 500 samples, perfectly plated, in four weeks,” that’s a Xiamen job.
Why Vietnam Keeps Growing
The Hanoi factory doesn’t try to be Xiamen. It focuses on volume, consistency, and cost. Labour-intensive steps like polishing and inspection naturally cost less there. More importantly, shipping a finished zinc die casting order from Vietnam to the U.S. often avoids the heavy duties that Chinese exports attract. It’s not about hiding anything – it’s about using trade rules exactly as they were written.
We deliberately set up the same ERP system, the same SOPs, the same plating bath chemistries. A satin nickel shower handle cast and plated in Hanoi looks identical to one that rolled out of Xiamen. That’s been the key to getting big clients comfortable with split orders. They sign one contract. We decide internally where each batch runs best. They just get their parts on time, at the right landed cost.
ZAMAK DIE CASTING MANFUACTURE
How to Tell If a Dual-Location Setup Is Real
Lots of companies claim to have factories in both China and Vietnam. Some of them really just have a partner factory across the border, which is fine – but it’s not the same as a single zinc die casting manufacture with genuine internal control over both sites. When you’re vetting a supplier, ask blunt questions:
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“Can you move my mold from China to Vietnam in under a week?” If they hesitate, the operations aren’t as integrated as they say.
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“Will I deal with one quality manager for both locations?” You should. Our QC team runs the same inspection sheets in both plants.
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“Show me salt spray test results from the same product made in both factories.” The data should match. If it doesn’t, the processes aren’t truly standardised.
We’ve had cases where a client originally produced everything in Xiamen, then moved the high-volume SKUs to Hanoi while keeping the tricky, low-volume premium items in China. That kind of flexibility is what dual sourcing is actually about. Not contingency planning in a binder, but practical, dollar-and-cents allocation decisions you can make every quarter.
The Cost Conversation Nobody Likes Having
Price-per-piece is still the first number buyers look at, but the smart ones now talk about total landed cost. A zinc die casting component made in Hanoi might carry a slightly higher base material cost but avoid a 25% tariff. Suddenly, the math changes. Add in lower labour for polishing, and you’re protecting margins without touching quality. That’s the conversation we keep having with Kohler’s team, and it’s never been about choosing one country over the other – it’s about mixing them the right way.
| Reality Check | China (Xiamen) | Vietnam (Hanoi) |
|---|---|---|
| Prototyping speed | 10–15 days | 15–20 days |
| Volume piece price | Strong on complex geometries | Strong on labour-heavy finishes |
| U.S. tariff exposure | Often high | Often zero or minimal |
| Engineering depth | Very high, DFM-heavy | Process execution, continuous improvement |
| Finishing capabilities | Full in-house (plating, PVD, powder) | Full in-house (mirroring Xiamen) |
None of this is meant to push one location over the other. The whole point is that they work together. Our U.S. clients, especially those in sanitary ware and locks, have figured this out faster than most. They send us forecasts, we help split the load, and the supply chain just hums.
One More Thing
We started with zamak die casting decades ago because it’s just a phenomenal material for bathroom and hardware products. Thin walls, intricate details, and plating adhesion that other metals can only dream of. That hasn’t changed. What has changed is where and how brands want those parts made. Vietnam is no longer the cheap alternative – it’s a strategic piece of the puzzle. China isn’t fading – it’s still the engineering brain. A good zamak die casting manufacture should give you both. That’s what we’ve built.
If you’re rethinking your zinc die casting supply chain for the next few years, drop us a note. We’ll walk you through how we handle split orders between Xiamen and Hanoi, and send along some plated samples from both plants so you can compare.
🌐 www.zamakdiecasting.com
📧 contact@stickindustry.com