Explainer: How Service Bureaus Price Metal AM Jobs

Service bureaus price metal additive manufacturing jobs by combining several distinct cost blocks. A quote is not just the cost of powder and machine hours. It includes preparation, build, post-processing, inspection, and documentation. Understanding this structure helps engineers identify where design choices shift the final price.

What goes into a metal AM quote

A typical metal AM service bureau quote breaks down into four main areas. The first is the machine time and material cost. This covers the build platform, powder usage, and energy. The second is post-processing, which includes heat treatment, machining, and surface finishing. The third is quality assurance, covering inspection and certification. The fourth is overhead and profit, which varies by provider.

Each block behaves differently. Machine time is fixed by the build volume. Material cost scales with part size. Post-processing depends on the required surface finish and dimensional tolerance. Quality assurance depends on the industry standards and the level of traceability required.

How material choice affects price

The alloy selected drives much of the cost. Standard materials, such as 17-4PH stainless steel, 316L stainless steel, and A356 aluminum, are priced lower than specialty alloys. Specialty alloys, like Inconel 718 or titanium Ti-6Al-4V, cost more because they require specific powder sourcing, tighter processing windows, and often more extensive heat treatment.

Powder quality also matters. High-purity powder with consistent particle distribution reduces defect rates. If a part requires a material that is not in the bureau’s standard stock, the price may increase due to minimum purchase thresholds or longer lead times for powder delivery.

Engineers should specify the material by grade and standard. Vague requests for “high strength steel” lead to slower quoting and potential cost overruns. Naming the alloy, heat treatment condition, and required mechanical properties gives the service bureau a clear basis for pricing.

How part design changes build time

The geometry of the part determines how much powder is used and how long the machine runs. Build time is not simply the time it takes to melt the part. It is the time required to lay down all the layers in the build volume. A part with a large height but small footprint can take just as long to build as a small part with a large footprint, if it occupies the same vertical space.

Support structures add to the cost. Complex overhangs and thin features require more supports. More supports mean more powder to use, more time to remove them, and more surface area to finish.

Engineers can reduce costs by orienting parts to minimize support volume. Placing a part flat on the build plate, if the design allows, reduces the need for complex support geometry. Combining multiple small parts into one build volume also lowers the average cost per part. The machine runs for the same amount of time for a full build plate, so spreading that time across more parts reduces the per-part machine cost.

How post-processing impacts the final price

Post-processing is often where the cost difference appears between two parts that look identical in CAD. A part that requires a mirror finish costs significantly more than a part that only needs a matte finish. A part with tight dimensional tolerances requires more CNC machining after the build.

Heat treatment is a major cost factor. Some alloys require solution annealing to reach the required mechanical properties. Others may need age hardening. Each step adds labor and energy costs. If a part requires multiple heat treatment cycles, the cost increases accordingly.

Surface finishing options range from simple bead blasting to polishing. Bead blasting is standard for many functional parts. Polishing adds hours of skilled labor. Engineers should specify the required finish in the drawing or RFQ. Leaving it to the service bureau to decide can lead to a higher price if they choose a more expensive option by default.

How quality assurance and certification affect pricing

Certification is not optional for many industrial applications. It depends on the end use. A part for a non-critical fixture may only need basic dimensional inspection. A part for an aerospace or medical application requires full material traceability, CT scanning, and often full heat treatment verification.

Full material traceability means the bureau can provide a certificate of analysis for the specific powder lot used. This requires documentation and record keeping. It adds labor cost.

CT scanning adds cost per part. It is a non-destructive inspection that checks for internal defects. The number of scans required depends on the part size and the risk assessment. A small part may require one scan. A large part with multiple critical features may require several.

Engineers should state the required inspection level in the RFQ. Asking for “full QA” is vague. Specifying “AS9100 traceability with full CT scan” or “ISO 10993 biocompatibility documentation” gives the bureau a clear scope.

How batch size and build volume work

Service bureaus price jobs on a per-build basis, not just a per-part basis. A build is one run of the machine. The cost of the build is shared across all parts in that run.

If you have ten small parts, they can fit into one small build volume. The machine time is short. The cost per part is low.

If you have ten large parts that require a large build volume, the machine time is long. The cost per part is higher.

Consolidating parts is one of the most effective ways to reduce metal AM pricing. If your design allows it, ask the service bureau if multiple parts can share a build. This is especially useful for prototypes or small production runs where the part volume is low.

Worked example: two parts, one build

Imagine a service bureau receives two parts. Part A is a small titanium bracket. Part B is a larger titanium housing. Both require the same alloy and the same heat treatment.

Part A is small. It fits on a small build plate. Part B is large. It requires a large build plate.

If they are built separately, the bureau runs the machine twice. The small build costs X. The large build costs Y. The total cost is X plus Y.

If they are built together, and Part A fits on the same large build plate as Part B, the bureau runs the machine once. The cost is Y, plus a small amount for the extra powder and support material for Part A. The total cost is slightly higher than Y, but much lower than X plus Y.

The cost per part for Part A drops significantly. The cost per part for Part B stays roughly the same, because it still dominates the build.

This is why service bureaus often ask about build consolidation. It is a direct way to reduce the overall project cost.

How to structure your RFQ for accurate quotes

A clear RFQ reduces the back-and-forth and helps the service bureau give a firm price. Include the CAD files in a neutral format. State the material, heat treatment, and surface finish. Define the inspection requirements. Specify the quantity and whether the parts can be built together.

Do not assume the service bureau will know what you need. If you need a part that meets a specific industry standard, say so. If you need a part that must be traceable to a specific powder lot, say so. If you need a part that will be painted, say so.

The more specific you are, the more accurate the quote. Vague requests lead to generic quotes that may be higher than necessary.

Common mistakes that raise metal AM pricing

One common mistake is ignoring support design. If the part is oriented poorly, the cost of supports and post-processing increases. Another mistake is requesting a finish that is not necessary. A matte finish is often good enough for internal parts.

Another mistake is not consolidating builds. Building parts separately when they could be built together wastes machine time and powder.

Finally, not specifying the inspection level leads to over-pricing. If the part does not need a CT scan, do not request one. If it does need a CT scan, specify it so the bureau can price it correctly.

How to compare quotes from different bureaus

When comparing quotes, do not look only at the total price. Look at what is included. Does the price include heat treatment? Does it include inspection? Does it include packaging and shipping?

Two quotes may look similar but have different scopes. One may include full traceability. The other may not. One may include a CT scan. The other may not.

Ask for a breakdown of the cost blocks. This helps you understand where the cost is coming from and where you can negotiate or optimize.

If one bureau is significantly cheaper, ask why. They may use a different material, a different process, or less inspection. Make sure the lower price does not mean lower quality.

The goal is not to find the cheapest price. The goal is to find the best value for the required quality and lead time.

Final thoughts on metal AM pricing

Metal AM pricing at service bureaus is transparent once you understand the structure. It is based on material, build time, post-processing, and inspection. Design choices have a direct impact on cost. Orientation, support, and finish all matter.

Engineers who control their design and clearly specify their requirements can get accurate quotes and manage their budget. Service bureaus price jobs on a per-build basis, so consolidating parts is a key cost saver.

By understanding these factors, you can make informed sourcing decisions and avoid surprises in the final invoice.