Primary process: Bending. The full route, materials, tolerances and design tips for a duct section, with an indicative cost.
BendingPrimary process
Sheet formingFamily
7Route steps
+/-0.2mmTypical tol.
A duct section is primarily made by Bending. Sheet-metal bending (press braking) forms a straight bend in sheet by pressing it into a V-die, building a 3D part from flat stock through a sequence of bends. Below is the full route to make a duct section, the materials it suits, the tolerances to expect and the main design points. The route is free, from the finder.
Step by step
How a duct section is made
The usual route, raw material to finished part. The amber step is where the duct section gets its basic shape.
Material
Select the sheet grade and gauge for the duct section.
Blanking
Cut the flat blank, by laser for low volume or a blanking die at scale.
Tooling Low (laser) to high (die) Tolerance ±0.05 to 0.3mm Lead days to weeks
Bending
Form the blank into the duct section on the press brake.
Tooling Low Tolerance ±0.1 to 0.5mm / ±0.5° Lead 1 to 3 weeks
Secondary features
Punch or drill the holes and cut-outs the part needs.
Tooling None Tolerance ±0.05 to 0.2mm Lead hours to days
Joining
Spot weld, fasten or bond into the assembly where the duct section is more than one piece.
Tooling Medium Tolerance joint Lead immediate
Finish
Deburr the edges and powder coat or plate for protection and colour.
Tooling Low Tolerance adds 0.05 to 0.2mm Lead days
Inspection
Check formed dimensions, hole positions and flatness.
Need the real cost for a duct section? The free route above is yours. Unlock the full dossier to quote and source it.
Where this process typically lands. Tighter is possible with extra operations like grinding, at higher cost.
Materials
Materials for a duct section
Grade
Why it suits this
Mild steel
Easy to form
Aluminium 5052
Formable, corrosion
Stainless 304
Springback higher
Design
Design tips
General pointers. The full design-for-manufacturing list for a duct section is in the dossier.
Bend radius too tight.Use >=1x thickness inside radius.
Flange shorter than brake minimum.Lengthen the flange.
Cost
What a duct section should cost
Press-brake forming; cost scales with number of bends and setups. Few bends, generous tolerance = cheap.
PER-PART COST vs VOLUME
Per-part cost drops as volume spreads tooling and setup over more parts. The exact figures for a duct section at your volume, in your currency, are in the dossier.
MODEL EST.
$4.6 to 13per part at 1 off
A rough ballpark only. The dossier gives should-cost at your exact volume and currency, with the full breakdown.
GET THE FULL DOSSIER
Everything you need to quote and source it
The free route above is yours. To actually put a number on a duct section and buy it well:
Should-cost at your exact volume in 12 currencies, with the material, processing, tooling and overhead breakdown
Who to source from, typical MOQ and lead time, and the exact RFQ checklist to send
A quote checker that tells you if a supplier quote is fair, and the red flags to watch
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A duct section is primarily made by bending. The route is: Material; Blanking; Bending; Secondary features; Joining; Finish; Inspection.
What does a duct section cost?
It depends on size, tolerance and volume. As a rough ballpark it starts around $4.6 to 13 per part at 1 off and falls with quantity. The dossier gives should-cost at your exact volume and currency. A model estimate, not a quote.
What material is a duct section made from?
Common choices are Mild steel; Aluminium 5052; Stainless 304.
What is the main process for a duct section?
Bending. Enclosures, brackets, panels and chassis in low to high volume.
See the exact route and should-cost for your part
The free finder maps your part to its process and full route. Pro adds should-cost at your volume, sourcing and an RFQ draft.
