Chemical Etching Invar is a core capability at VT machining. We combine controlled etching with material-aware setup for Invar — an alloy that is ultra-low expansion; etched for masks and precision frames — to produce parts that meet your specification first time.
Chemical Etching Capability for Invar
- Foil thickness 0.02–1.0 mm
- Minimum feature ≈ 0.8 × metal thickness
- Burr-free, stress-free edges
- Tooling-free: revise artwork digitally
How Chemical Etching Invar Works
A photo-resist patterned from your artwork masks the Invar, and an etchant dissolves the exposed metal evenly from both sides. Because there is no mechanical force, the part stays flat and stress-free.
Every job begins from your CAD model or 2D drawing. Fixturing and tool paths are planned so the most critical dimensions are produced in the most rigid, repeatable setup. Critical dimensions are checked on the first part and monitored through the run.
Working with Invar
Invar offers a useful combination of properties: it is ultra-low expansion; etched for masks and precision frames. Those characteristics shape how we approach chemical etching — from tool and parameter selection to work-holding and coolant.
If your application is sensitive to alloy condition, we agree the specification in writing and document it. Stock is sourced from reputable suppliers so what you order is what you receive.
Chemical Etching Quality & Inspection
Consistent quality comes from disciplined process control. Critical dimensions on Invar parts are checked in-process and verified at final inspection using calibrated instruments and, where required, CMM measurement. Full documentation — dimensional reports, mill certs, FAIR — is available when your programme needs it.
Design Tips for Chemical Etching Invar
A few design choices make a real difference to cost and quality. Designing features no finer than ~0.8× foil thickness and allowing tab placement gives the best yield on etched Invar. If you send your model early, we will return practical DFM feedback before you commit to production.
Chemical Etching Tolerances & Surface Finish
Etched Invar holds tight, repeatable feature tolerances on thin gauge, with a minimum feature size around 0.8× the metal thickness and completely burr-free edges.
Final tolerances are governed by the material's behaviour, wall thickness and overall stiffness. We give honest DFM feedback if a callout would be costly or better achieved another way.
Secondary Operations & Finishing
We complete Invar components with the secondary steps your drawing calls for. We arrange heat treatment, surface treatment, marking and assembly as needed. Tell us the final spec and we will plan the full route so parts arrive ready to use.
Applications of Chemical Etching Invar
Chemical Etching of Invar supports parts across aerospace, medical, automotive, electronics, semiconductor, energy and general industrial sectors. We scale from one-off prototypes to ongoing production while holding the same quality.
How to Order Chemical Etching Invar
Ordering Invar parts is straightforward. Provide the drawing, material, quantity and any certification needs. Our engineers reply — in English — with feasibility, pricing and a realistic lead time, usually within one business day.
Other Metals for Chemical Etching
Need Chemical Etching Invar for your project? Send your drawing and quantity for a fast quotation.
Request a QuoteFrequently Asked Questions
What is the typical lead time and minimum order for Chemical Etching Invar?
Because chemical etching needs no hard tooling, Invar etching prototypes turn around quickly and scale to volume from the same digital artwork. Send your drawing and quantity for an exact lead time and MOQ.
Why is Invar a good choice for Chemical Etching?
Invar is ultra-low expansion; etched for masks and precision frames, which makes it well suited to Chemical Etching. We tune the process to the alloy so the finished Invar etching part meets your dimensional and functional requirements.
What material thickness or size range suits Chemical Etching Invar?
Etching suits Invar foil roughly 0.02–1.0 mm thick — the thinner the foil, the finer the achievable detail.
Which industries use Chemical Etching Invar parts?
Chemical Etching Invar parts are used across aerospace, medical, automotive, electronics, semiconductor and general industrial sectors — anywhere precise Invar components are required.
What surface finish is achievable on Invar with Chemical Etching?
Etching leaves Invar with a uniform matte surface and clean, burr-free edges, with optional post-etch finishing.
Does Chemical Etching Invar require dedicated tooling?
No. Invar etching is tooling-free — the pattern is a photo-resist made from your artwork, so design changes cost nothing in tooling and prototypes are fast.