CategoryCutting to length
Cutting to length: coil-fed steel sheet, tolerances and how it differs from sawing
Cutting to length is a coil-line service: a coil is uncoiled, leveled and sheared into flat sheets at a length you specify. That makes it a different process from contract sawing, which cuts bar or section stock to length with a saw, and from slitting, which narrows a coil's width without changing its length. This page covers what a coil-fed cut actually achieves, how the two neighbouring services differ, and what a provider needs from you to quote.
Achievable tolerances
| Process | Form | | Tolerance | | |
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| Cut-to-length line | Sheet | — | ±0.25 mm | Supplier-published | Source: Alliance Steel — published cut-to-length length/width tolerance ±0.010 in |
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| Cut-to-length line | Sheet | — | ±1.5875 mm | Supplier-published | Source: Alliance Steel — published cut-to-length squareness tolerance ±0.0625 in |
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| Cut-to-length line | Sheet | — | ±0.381 mm | Supplier-published | Source: Team Pacesetter — published cut-to-length length tolerance ±0.015 in for dry steel |
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| Cut-to-length line | Sheet | — | ±0.787 mm | Supplier-published | Source: Team Pacesetter — published cut-to-length length tolerance ±0.031 in for oiled steel |
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Indicative figures from named suppliers. Confirm the achievable tolerance with the provider for your grade, thickness, width and quantity.
What drives the price
- Material thickness
- Steel grade
- Coil width
- Target sheet length
- Total volume
- Tolerance requirement
- Coil source — your material or the provider's stock
- Packing requirement
What to send for a quote
- Grade or material number
- Thickness
- Width
- Sheet length
- Quantity
- Coil source
- Packing requirement
Traceability and EN 10204 certificates
Standard for steel purchases: 3.1
The certificate belongs to the coil, not to the cut. A cut-to-length line does not create an EN 10204 certificate — the real question is whether traceability survives decoiling and shearing, and how the resulting sheets are marked or batched so that it does.
Standard-defined
Source: EN 10204 defines inspection-document types.
Cut-to-length, contract sawing and slitting are not the same service
Cut-to-length is a coil-line service: a coil is uncoiled, levelled and sheared into flat sheets of a set length. Contract sawing cuts bar or section stock with a blade, and slitting narrows a coil’s width while its length stays as it is.
Supplier-published
Slitting width tolerance, for comparison
| Slitting width tolerance | 0.127 mm | | |
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Quoted only to make the boundary concrete: a slitting tolerance controls width, while the cut-to-length tolerances above control length and squareness. It is not a cut-to-length figure.
Supplier-published
Typical line capacity
Indicative figures from named suppliers. Confirm the achievable tolerance with the provider for your grade, thickness, width and quantity.
Supplier-published
Services
What tolerance can a cut-to-length line achieve?
It depends on the line and the material. A published sheet-length/width tolerance from one coil-line provider is about ±0.25 mm. Two other providers report a length tolerance of about ±0.4 mm on dry, uncoated steel and about ±0.8 mm once the steel is oiled — oil on the sheet affects how it feeds and shears. A narrow-strip line (a different segment, cutting strip roughly 9.5 to 140 mm wide rather than full sheet width) publishes a looser, one-sided tolerance of about +6.4 mm on the cut length. Confirm the achievable figure for your grade, thickness and width with the provider.
What squareness can I expect on a sheared sheet?
One coil-line provider publishes a squareness tolerance of about ±1.6 mm on a sheared sheet. That is separate from the length tolerance — a sheet can be the right length and still be slightly out of square if the shear or the feed isn't holding true. Confirm the achievable squareness for your sheet size with the provider; we have not found a second independent figure to corroborate this one.
Will the sheet come out flat?
We have not found a supplier-published numeric flatness figure (an 'I-unit' or similar leveling index) for a general cut-to-length line that we could confirm from the source itself, so we are not going to hand you a number we can't stand behind. Flatness on a CTL line comes from the leveler ahead of the shear — ask the provider what leveling equipment they run and what flatness they will commit to for your grade and thickness.
What is the difference between cut-to-length and contract sawing?
Cut-to-length feeds from a COIL: the material is uncoiled, leveled and sheared into flat sheets. Contract sawing cuts BAR or SECTION stock — round, square, flat bar, structural profile — with a saw blade. The input form is the whole difference: if your material starts life as a coil, you want cut-to-length; if it starts as bar or profile, you want contract sawing.
What is the difference between cut-to-length and slitting?
Both start from coil, but they change different dimensions. Slitting narrows the coil's WIDTH — a wide coil goes in, several narrower coils come out, length unchanged, and one provider publishes a slit-width tolerance of about ±0.13 mm. Cut-to-length changes the coil's LENGTH — it cuts across the coil to produce flat sheets of a set length, width unchanged. If you need narrower coil, ask for slitting; if you need flat sheets of a set length, ask for cut-to-length.
What information do you need for a quote?
Send the grade or material number, the thickness, the width, the sheet length you need, the quantity, whether you're supplying the coil or sourcing it from the provider, and any packing requirement. Those seven things are what turn an enquiry into a firm price rather than a range.
Can I send my own coil to be cut?
Cutting a customer-supplied coil is common practice, but whether a given line accepts it — and on what terms regarding liability, remnant coil and traceability — varies by provider. Ask before shipping, and if the coil carries an inspection certificate, ask in the same message how the cut sheets will be marked or batched so traceability survives the cut.
Do I get an EN 10204 3.1 certificate?
EN 10204 defines inspection document types 2.1, 2.2, 3.1 and 3.2, and 3.1 is the usual buyer default in steel procurement. But a cut-to-length line does not create a certificate — the certificate belongs to the coil. What matters is whether traceability survives decoiling and shearing, and how each batch of sheets stays linked to its heat. Ask the provider that directly.
Is there a minimum order quantity?
There is no industry-wide minimum order quantity for cut-to-length; it varies by provider and by how a partial coil is handled. Ask as part of your enquiry rather than assuming.
What is the lead time?
No general lead time can be stated honestly — it varies by provider, coil availability, and the line's current load. Ask for a committed date with your quote.
What edge condition does a sheared sheet have?
A sheared edge is not the same as a slit or ground edge — the trade recognizes named edge conditions (mill, slit, cut, dressed) for exactly this reason. We have not confirmed a numeric burr-height limit for cut-to-length shearing that we're comfortable citing, so ask the provider what edge condition their shear leaves and whether deburring is available if you need it.
What does cutting steel to length cost?
Cut-to-length is not priced from a single rate, so any figure quoted here would mislead. What drives it is material thickness, steel grade, coil width, the target sheet length, total volume, the tolerance you require, whether you or the provider supplies the coil, and any packing requirement. Send the seven items in the quote checklist and you will get a firm price instead of a range.