How to specify a sheet metal cut so the quote comes back right the first time

How long a cutting quote takes rarely depends on the service center. It depends on how many times somebody has to ask for something that could have been in the first email.

Here is the complete list, in the order it gets used to quote, and then the assumptions that need to be made explicit because they are the source of almost every misunderstanding.

The eight items used to quote

1. Material and coating

"Steel" is not enough. State the family (GI, EG, CR, HR, aluminum, stainless) and, where it applies, the coating designation or grade. If you do not know it, describe the end use: it can be inferred fairly precisely.

2. Thickness

In millimeters if possible. If you work in gauge, write it like this: "20 gauge (approx. 0.9 mm)". Gauge is an inherited scale that does not match across materials, and that ambiguity has a cost.

3. Output size

• For sheet: width and length, indicating which dimension runs with the rolling direction if it matters to you.
• For strip: the width of each strip and how many of each width.

4. Entry coil width

If you already own the coil, this item changes yield and therefore price. If you do not have it, say so and the optimal width gets calculated.

5. Quantity

In pieces, tons or coils. And make clear whether it is a one-time run or a repeating one: a monthly program is quoted differently from a loose lot, and almost always better.

6. The tolerances that actually matter

Do not paste a full tolerance table if only one of them is critical. Say which: if width is what rules, say so; if flatness rules because the part goes into an automated fixture, say that. Specifying everything as critical is the same as specifying nothing.

7. Date

The date you need it at your plant, not the date you want it cut. They are two different things and the confusion is expensive.

8. Packaging and delivery

Banded, corner-protected bundles are standard. If you need separators, pallets at a specific size, edge protection or labeling with your part number, say so at the quoting stage: adding it later is a price change.

The three silent assumptions

These never get written down and they cause half the claims.

Rolling direction

In a rectangular sheet the material does not behave the same lengthwise as crosswise. If your part is bent, the minimum radius changes depending on whether the bend is parallel or perpendicular to the rolling direction. If that matters, put it on the order; if you do not, the sheet will be cut whichever way makes the best use of the coil.

Which face is the good face

On material with one face better than the other, or where handling can mark the surface, you have to say which face will be visible. It is a one-line item that prevents rejecting a whole bundle.

What happens to the remainder

Slitting a coil to a width that is not a divisor of the entry width leaves a leftover strip. Is it delivered to you, scrapped, or quoted as scrap? Agreeing beforehand avoids the awkward conversation afterwards.

An example of a well-built request

"Good morning. We need G90 galvanized steel sheet, 20 gauge (0.9 mm), 1,220 x 2,440 mm, 400 pieces for delivery on October 20 at our plant in Parque Industrial El Florido, Tijuana. Flatness is critical because it goes into an automated welding fixture; width has normal tolerance. Packaging on banded pallets, maximum 1.5 tons per bundle. We do not have the coil: we need you to supply it."

That paragraph gets quoted the same day. It has no exotic jargon: it has complete data.

What you can ask for in return

When the quote arrives, it is reasonable to expect:

• Price with a clear unit (per piece, per kilogram or per ton) and what it includes.
• A committed date, not a two-week window.
• Confirmation that the size fits the line's capacities.
• What happens to the coil remainder.
• How long the price holds, because steel moves.

If any of that is missing, ask before releasing the order. Asking is cheaper than rescheduling.

Back to the blog