No. 6555 Songze Avenue, Chonggu Town, Qingpu District, Shanghai, China
How to Reduce Costs on Sheet Metal Parts
Hey, I’m Barry Zeng. I’ve been making sheet metal parts for 12 years at Shanghai Yunyan Prototype & Mould Manufacture Factory, and if there’s one key lesson I’ve learned, it’s this: most people pay way too much for their fabricated parts. Usually, this isn’t because the fabricator is ripping them off, but rather because they don’t realize where manufacturing money actually goes.
Over the years, I’ve watched engineers specify high-grade stainless steel for a simple mounting plate that sits inside a dry office. Furthermore, I’ve seen drawings specifying razor-thin tolerances on non-critical features. I’ve also seen beautiful designs that cost twice what they needed to. Fortunately, simple design adjustments can often save clients thousands of dollars in less than half an hour. In this guide, I want to walk you through practical strategies for cutting costs on sheet metal parts. No numbered lists or textbook bullet points — just real shop floor stories and lessons learned along the way. Grab a coffee, and let’s get into it.
How to Reduce Costs on Sheet Metal Parts
I still remember the first time a client asked me to review an unusually high quote. They were producing a simple mounting bracket — roughly 150mm long with a few basic bends and holes. However, the initial quote came back at $45 per unit for a 500-unit batch, bringing the total to $22,500. Surprised by the cost, they asked, “Barry, why does this simple part cost so much?” Upon inspecting their technical drawing, the root causes were immediately clear. Specifically, they had specified 304 stainless steel, applied ultra-tight tolerances across every dimension, and included a decorative laser cutout pattern that would be completely hidden during assembly. After thirty minutes of redesigning, we switched to mild steel, relaxed non-critical tolerances, and eliminated the hidden cutouts. As a result, the unit price dropped to $18, saving them $13,500 instantly.
The Stainless Steel Trap
This scenario happens repeatedly on the shop floor. When I notice “304 Stainless Steel” in a title block and ask the design engineer about the material selection, the reply is almost always: “Because we’ve always used stainless.”
Naturally, stainless steel is necessary for specific environments. For instance, if your sheet metal parts operate inside food processing equipment, marine vessels, or medical devices requiring aggressive chemical sterilization, stainless steel is essential. However, if the component lives inside a dry office enclosure or a climate-controlled factory, low-carbon mild steel or aluminum performs equally well at a fraction of the cost.
To put raw material expenses into perspective, a sheet of 304 stainless steel costs roughly 2.5 to 3.5 times more than mild cold-rolled steel. Similarly, standard aluminum sheet costs 1.5 to 2 times as much. Consequently, selecting an unnecessary alloy can quickly inflate an entire production budget.
For example, a customer once brought us an electronics enclosure box specified in high-grade 316 stainless steel. When I asked whether the housing encountered harsh chemicals, moisture, or patient contact, they admitted it sat safely inside an indoor server room. Consequently, we switched the material to anodized aluminum, reducing total production cost by 40% without compromising structural performance.
The Tolerances That Didn’t Need to Be There
Unnecessary precision is another hidden cost driver. Frequently, I review engineering drawings specifying a tight ±0.01 mm tolerance on clearance mounting holes. Even though the passing fastener has over 0.5 mm of clearance and the hole position could vary by 0.2 mm without affecting assembly, engineers often apply tight default block tolerances across the entire print.
Holding extreme precision on formed sheet metal parts is inherently expensive. Because sheet metal springback and thermal stress during laser cutting cause minor material movement, maintaining ±0.01 mm requires secondary reaming operations, specialized inspection setups, and slower processing speeds. Ultimately, these additional manufacturing steps increase your unit cost.
In standard sheet metal fabrication, commercial tolerances hover around ±0.5 mm (±0.020 inches) for most formed features. That accuracy level is more than sufficient for 90% of industrial applications. Therefore, tight tolerances should only be specified where fit and function truly demand them. In fact, relaxing non-critical dimensions regularly yields 10% to 15% in direct cost savings.
The Decorative Cutout That Nobody Saw
A few years ago, a designer submitted a drawing for an internal structural bracket. The component featured geometric cutouts that looked visually striking. However, because the part was permanently enclosed inside a commercial machine where no one would ever see it, those extra cutouts simply added unnecessary laser burn time, weakened structural rigidity, and increased piece price.
When I pointed out that the bracket would remain invisible after assembly, the designer agreed to remove the decorative elements. As a result, removing the unnecessary geometry reduced unit cost by 15% while improving part strength.
Of course, aesthetic features make sense on visible exterior panels, consumer products, or branding elements. However, for internal structural components, every feature should serve a functional purpose rather than an aesthetic one.
The Power of Nesting (And Why It Matters)
Material utilization is another critical factor that impacts part price. When blanking sheet metal parts from large stock sheets, unused skeleton material represents scrap cost that is factored into your quote. Poorly nested parts can leave 40% to 60% of a raw sheet as waste.
For instance, a client producing 10,000 small rectangular brackets annually had used an older design for years. After optimizing their part geometry slightly to fit tighter nesting layouts on standard sheet sizes, material utilization improved by 12%. Consequently, that minor optimization saved over $5,000 per year in raw material alone.
Generally, simple and modular shapes nest together far better than complex, interlocking geometries. Designing features that align neatly on a flat sheet minimizes scrap rate and keeps raw material expenses low.
The Finish You Didn’t Need
While surface treatments like powder coating and anodizing provide excellent protection, they add secondary processing fees. If components are hidden inside a sealed, dry enclosure, high-end cosmetic coatings are often redundant.
One client previously applied heavy powder coating across every single component they produced. However, after evaluating their assembly, we realized many internal brackets never encountered outdoor weather or environmental moisture.
By switching internal steel parts to a light rust-inhibiting oil coat during transit instead of full powder coating, they saved $4,000 annually without compromising product longevity or performance.
Similarly, for stainless steel components, simple chemical passivation offers excellent corrosion protection at a lower cost than multi-coat paint systems. Surface finishing should always match the working environment of the part.
The Volume Question
Order quantity dramatically impacts unit cost due to fixed setup time. Machine programming, laser parameter calibration, press brake tooling setups, and press adjustments require the same labor time whether producing 10 pieces or 1,000 pieces. Therefore, ordering small batches means setup costs are amortized over fewer parts.
For example, a custom prototype component might cost $200 as a one-off run, whereas the unit price drops to $20 at 1,000 units. Combining recurring orders into larger production batches is one of the most effective ways to lower piece prices immediately.
The Two Mindsets — Which One Are You?
When optimizing sheet metal designs, two distinct engineering approaches exist. The first approach emphasizes dividing complex geometry into simpler, easy-to-bend subcomponents. While simpler components reduce raw material scrap and press tooling complexity, they do introduce secondary welding or assembly labor.
The second approach focuses on unifying multiple features into a single complex stamped or bent part. This eliminates assembly labor and secondary hardware, though it can result in lower sheet nesting efficiency during blanking.
For instance, on a recent production review, we evaluated both strategies. A unified one-piece design produced 33% material utilization, consuming 2.8 kg of steel per unit. Conversely, a multi-piece welded design used 100% of the blanked sheet metal, requiring only 1.0 kg of steel. Because raw material savings outweighed the small welding cost, the multi-piece assembly proved significantly cheaper overall. Conducting a proper Design for Manufacturability (DFM) review helps identify which path yields the lowest total cost.
What I’ve Learned After 12 Years
After 12 years on the shop floor, one principle stands out clearly: the vast majority of manufacturing costs are locked in before a drawing ever reaches the fab shop. Material selection, tolerances, part complexity, nesting layout, finishing requirements, and batch sizes are all decided during the initial design phase.
Consequently, the clients who achieve the highest cost savings are those who engage early with their fabricator, asking where costs originate and exploring alternative design options before finalizing production prints.
Although every project presents unique design constraints, the foundational principles remain consistent. Choose functional materials, specify practical tolerances, streamline geometries, maximize sheet nesting, select appropriate finishes, and batch your orders whenever possible.
Let’s Talk About Your Parts
If you’re currently producing sheet metal parts and want to ensure you aren’t overpaying, I would be glad to review your designs. Simply send over your technical drawings or 3D CAD files. I’ll personally analyze your prints, highlight cost-reduction opportunities, and provide a complimentary DFM report alongside a competitive quote within 24 hours.
Furthermore, if your design is already fully optimized for manufacturing, I’ll let you know that directly — and give your team full credit for a job well done.
👇 Want to Cut Costs on Your Sheet Metal Parts? Let’s Talk.
Send me your drawing or CAD file. I’ll review your design, identify cost-saving opportunities, and give you a free DFM report and quote — within 24 hours. No robots, no voicemail. Just me and my honest opinions.
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+86 138 1894 4170
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P.S. Mention “cost guide” when you email, and I’ll send you my personal cost reduction checklist. It’s saved my clients thousands. And it’s free. Because I’m nice like that.
Barry Zeng
Senior Manufacturing Engineer, Shanghai Yunyan Prototype & Mould Manufacture Factory
(12 years of sheet metal experience. I’ve saved clients more money than I’ve spent on coffee. And I spend a lot on coffee.)
