Two quotes for the same drawing can differ by a wide margin, and the difference is rarely the shop’s hourly rate. It is how many operations the part needs, how well it nests, how many setups it takes, how many inches of weld it carries, what the finish requires and how many you are buying. Here is what goes into a fabrication price, and what you can change to lower it.
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- Material is often the largest single line, and nest yield — how much of the sheet or plate becomes parts — decides how much of it you pay for.
- Labor is driven by operations, not size: setups, bends, weld inches, hardware, machining and handling. A part with fewer operations is cheaper even if it is bigger.
- The biggest levers are design (fewer parts, standard radii, sensible tolerances, fewer and smaller welds) and buying (repeat quantities, releases against a blanket order, and a complete RFQ).
- Job Shop, Contract Manufacturer or Production Fabricator?
- Sheet Metal Shop vs. Structural Fabricator
- What Drives the Price of a Fabricated Part (you are here)
- What to Send With an RFQ
- How to Negotiate a Metal Fabrication Contract
- Counting Handoffs: In-House Finishing & Assembly
- Prototype to Production Without Re-Engineering
- Contract Metal Fabrication in Mississippi & the Gulf South
The parts of a quote
| Cost element | What drives it |
|---|---|
| Material | Grade, thickness, coating, market price, nest yield, drops and remnants |
| Engineering & programming | Drawing review, unfolding, nesting, CNC and brake programs (mostly one-time) |
| Setup | Tooling changes, fixtures, first-article checks — spread over the lot |
| Cutting | Cut length, pierces, thickness, process (laser, plasma, waterjet) |
| Forming | Number of bends, part handling, special tooling |
| Welding & fit-up | Weld inches and size, fixturing, positions, grinding |
| Secondary operations | Hardware, studs, tapping, machining, deburring |
| Finish | Blast, pre-treatment, powder system, masking, galvanizing |
| Assembly & inspection | Hardware, gaskets, doors, testing, documentation |
| Packaging & freight | Crating, protection, truck type, distance |
Material and nest yield
Material is frequently the largest single line in a fabrication quote, and it is priced off a volatile market, which is why longer-term work often uses steel escalators (see Part 5). What the buyer controls is yield: parts that nest efficiently on a standard 4′ × 8′, 4′ × 10′ or 5′ × 10′ sheet, or on standard plate, waste less. An odd blank size that leaves a strip too narrow to use, or a part that forces a special sheet or plate size, carries its scrap in the price. Using one material and thickness across an assembly lets parts nest together. Specifying a common grade and coating rather than a special order avoids minimums and lead time.
Operations and labor
Fabrication labor scales with the number of operations and touches, not with the size of the part. Each setup — a tooling change on the brake, a fixture on the welding table — is fixed time spread across the lot, which is why ten parts cost much more each than a hundred. Each bend is a handling step. Weld inches are often the biggest labor line on a weldment, and they grow fast with weld size, so oversized or continuous welds where stitch welds would do are expensive (see Weld Symbols & Weldment Design). Grinding welds smooth for appearance can take as long as welding them. And every secondary operation — press-in hardware, stud welding, tapping, machining — is another trip to another machine.
Finish, tolerances and inspection
Finish is priced by surface area, the coating system (one coat or two), masking and handling; a heavy part on a monorail line or a trip to the galvanizer adds more than a panel on a conveyor. Tolerances tighter than the process naturally holds add slower machining, inspection and sometimes a secondary operation (see How to Tolerance a Sheet Metal Drawing). Documentation — first-article reports, weld maps, material certs, test records — is real work, and should be quoted when it is required.
Quantity, releases and freight
Quantity spreads engineering, programming and setup across more parts, so price per part falls steeply at first and then levels off. A blanket order with scheduled releases lets the shop buy material and plan runs at an efficient size while you take delivery as needed. Repeat parts cost less than first runs because the programs, fixtures and flat patterns already exist. Freight matters on large, light parts — enclosures and cabinets ship a lot of air — so a fabricator closer to the site or the assembly plant can take real cost out.
How to lower the price
Design: combine parts where a bend can replace a weld; use standard inside radii and one material thickness; keep holes away from bends; use self-locating tabs and slots; specify welds by size and length instead of “weld all”; loosen tolerances that don’t affect fit or function; and choose a finish system that matches the environment rather than the most expensive one. Buying: quote realistic annual quantities, release against a blanket order, send complete, current files (Part 4), and ask for a DFM review — the shop that will build the part usually sees the savings fastest.
How FabTek quotes
FabTek’s engineering team reviews every RFQ against the processes it will actually run — nesting, bend sequences, weld inches, finish and assembly — and flags design changes that would lower cost without changing function through DFM review. Because cutting, forming, machining, welding, finishing and assembly are in house, the quote reflects one route through one plant rather than a stack of vendor markups, and programs are retained so repeat orders price and ship as repeats.
Frequently asked questions
What determines the cost of a fabricated metal part?
Material and how efficiently it nests; engineering, programming and setup; cutting, bending and welding time; secondary operations such as hardware and machining; finishing; tolerances, inspection and documentation; quantity; and packaging and freight.
Why do small quantities of fabricated parts cost so much more?
Engineering, programming, setup and first-article inspection are largely fixed costs, spread across however many parts are in the lot. At low quantities they make up a large share of each part's price.
How can I reduce metal fabrication costs?
Design for fewer parts and operations, use standard radii and one material thickness, size welds to the load, loosen tolerances that don't affect function, choose a finish that matches the environment, order realistic quantities against a blanket order, and ask the fabricator for a design-for-manufacturability review.
Why do fabrication quotes vary so much between shops?
Shops route the same part differently depending on their equipment and what they outsource. A shop with the right machines and in-house finishing may need fewer setups, handoffs and markups than one that sends cutting or coating out.
