What does a buyer check before ordering aluminium sections or sheet?
Answer
They check the alloy and temper against the application, the tolerance standard, and the finish, because anodising and powder coating change both lead time and cost. For extrusions they also check whether the die exists or has to be made.
A fabricator is deciding whether to move a profile to a new extruder and needs to know what happens to the tooling.
Information to make clear
Use the fields that affect this buying decision. Leave unsupported claims out.
- Alloy and temper
- The two together determine strength, formability and corrosion behaviour.
- Product form
- Extrusion, sheet, plate, foil and castings are different plants.
- Dimensional tolerance standard
- Fabricators plan around tolerance, not nominal size.
- Maximum extrusion circle or sheet width
- A hard filter on the enquiry.
- Finish options
- Mill, anodised, powder coated and brushed change lead time.
- Die status and ownership
- New die, existing die or transferred die are different projects.
- Minimum order quantity per profile
- Extrusion economics are driven by run length.
Documents to prepare
State what can be published, shared on request or issued with an order.
| Document | What it supports | Suggested handling |
|---|---|---|
| Mill test certificateMay be requested at: with delivery | Alloy composition and mechanical properties for the batch | Issue per shipment |
| Dimensional inspection reportMay be requested at: first run and on request | Conformity to the tolerance standard | Issue per shipment |
| Anodising or coating specificationMay be requested at: where finish is specified | Coating thickness and process, under a named standard | Share on request |
| Die drawing approval processMay be requested at: before die order | How profiles are approved before tooling is cut | Publish |
| ISO 9001 certificateMay be requested at: vendor approval | Quality system, with number and certification body | Publish |
| Alloy datasheetMay be requested at: design stage | Mechanical and physical properties of the alloys you supply | Publish |
| Recycled content statementMay be requested at: sustainability review | Substantiated recycled content, increasingly requested | Publish |
Details to ask in an enquiry
Collect only the information needed to assess the request and respond.
- Profile drawing or product form
- The starting point for any quote.
- Alloy and temper required
- Determines feasibility.
- Annual volume and order pattern
- Extrusion pricing depends on run length.
- Finish required
- Changes lead time and cost significantly.
- Die status
- New, existing or transferred.
- Delivery location and schedule
- Freight for long sections is a real constraint.
Related questions
Should die costs be published?
Publishing the basis is more useful than a price: what drives die cost, whether it is amortised against volume, and who owns the die afterwards. Fabricators are used to tooling costs; what stops them moving is uncertainty about ownership and transfer.
How specific should the alloy range be?
List the alloys and tempers you actually stock or run regularly, and say which are made to order. Buyers filter on alloy first, and a long aspirational list that turns out to be mostly special-order damages trust at the quotation stage.
Is recycled content worth stating?
Yes, with the percentage and its basis, because aluminium buyers are increasingly asked for it by their own customers. An unqualified sustainability claim is worse than none; a stated percentage with a basis is a commercial asset.
This is an editorial checklist, not a compliance standard. Requirements vary by market, customer and contract. Confirm current requirements with the responsible technical and commercial teams.
Plact Research. Plact's editorial desk for buyer-evidence guides. The guides organize common buyer questions, documents and enquiry fields. Requirements should be checked against current standards, regulations and contracts.