Steel Billet · Type

Continuous Casting Billet Supplier

Continuous-cast billet procurement should be tied to the downstream mill and an agreed acceptance plan for chemistry, section/length, surface condition, internal-quality evidence where required, traceability and cut condition; the casting route by itself is not a finished quality grade.

Casting is a forming route, not a grade. What decides acceptance is the downstream mill and the plan you agree with it — so this page covers the route itself, the evidence it does and does not carry, and what to settle before an offer can be written.

Standards & grade evidence

State these before an offer can be written

  • Target downstream productRebar, wire rod, bar, section or forging stock — the mill's product governs the chemistry and section that will roll cleanly.
  • Grade or chemistry basisThe grade designation with its governing standard, or a chemistry range agreed as a special order requirement.
  • Section and lengthCross-section, tolerance basis and cut length, matched to the mill's pass schedule and reheat charge.
  • Surface and cut conditionHow torch-cut ends, oscillation marks, corner condition and any dressing are to be inspected and accepted.
  • Evidence and traceabilityWhich heat analysis, MTC, macro or internal-quality evidence the buyer's standard actually requires.

Selection logic

When continuous-cast billet fits — and when it does not

Continuous casting is a route, not a grade. Decide on the downstream mill and the acceptance plan first; the casting route tells you how the semi-finished shape was produced, not what it will pass.

Fits when

  • The offer is tied to a named downstream mill and its rolled product, not bought as a standalone commodity.
  • Chemistry, section and cut length are agreed against the mill's pass schedule before the order is placed.
  • Surface, cut-end and, where required, internal-quality acceptance criteria are written into the enquiry.
  • Heat traceability is required from cast through to charge, with the document set named up front.

Does not fit when

  • The requirement is a finished product specification, with the casting route treated as proof of grade compliance.
  • The buyer has no downstream route defined, so no basis exists for agreeing section, length or chemistry.
  • A universal billet quality class is assumed to exist — it does not; acceptance is order-specific.
  • Chemistry is the only stated requirement and defect or internal-quality limits are left unaddressed.
Overhead view of a continuous billet caster with distinct strands feeding a torch-cut station, illustrating the production route being purchased.
The casting route determines how the semi-finished shape is produced. It does not, by itself, define a grade, a defect limit or a purchase tolerance — those come from the downstream order.

Closest related alternatives

Carbon steel billet

Choose on material family first when the chemistry basis is the open question, then return to the casting route.

Boundary: Material family and casting route are separate decisions; one does not settle the other.

carbon steel billet supplier

Other billet types

Compare square, round, rolling-mill and rebar-grade routes when the section or downstream use is still open.

Boundary: Each type carries its own section and acceptance implications; equivalence is not assumed.

steel billet types

Steel billet supplier hub

Step back to the full billet scope when grades, sizes and standards all remain to be narrowed.

Boundary: The hub covers the whole billet range; this page addresses the continuous-casting route specifically.

steel billet supplier

Decision tool

Continuous-Cast Acceptance Matrix

Decide whether a continuous-cast billet offer carries the evidence and acceptance criteria your intended re-rolling route needs. The tool separates the casting-route description from grade compliance, and only asks for internal-quality evidence when your standard or order actually requires it.

1. State the enquiry

2. Acceptance plan

No plan yet — three fields are required

  • Target downstream product
  • Steel grade or chemistry basis
  • Billet section and length

The remaining fields refine the plan but are not required to produce it.

Standards, grades & dimensions

What governs acceptance — and what is order-specific

Continuous casting describes a production route. The values that decide acceptance come from the governing standard and the order. Every row below names its method and source, and where a value cannot be stated without your documents it is shown as quote- or order-dependent rather than filled in.

Manufacturing route

  1. Step 1

    Steelmaking

    Chemistry is established in the furnace and refined before casting — this is where the grade is actually set.

  2. Step 2

    Continuous casting

    Molten steel solidifies into a semi-finished strand through a mould, then withdraws and cools.

  3. Step 3

    Cut to length

    The strand is cut to the ordered length. Torch cutting and dressing condition the cut ends.

  4. Step 4

    Cool, tag, bundle

    Billets cool, are heat-identified, bundled and made ready for dispatch to the mill.

Grades and standards — evidence status

The designations below are commonly encountered on billet enquiries. They are not interchangeable, and none is presented here as the universal billet specification. Confirm the exact edition and status of any standard against your own controlled document before the order.

Billet grade designations, their typical downstream association and the evidence the buyer must supply
DesignationTypical downstream associationStatus hereBuyer must supply
3SP / 3PSStructural carbon steel for bar and section rollingConditional comparison onlyGoverning standard and edition
5SP / 5PSReinforcing-grade carbon steel feedstockConditional comparison onlyGoverning standard and edition
Q235BGeneral structural steelConditional comparison onlyGoverning standard and edition
S235Structural steel designation under a European frameworkConditional comparison onlyGoverning standard and edition
ASTM gradesVaries with the specific designation and product formConditional comparison onlyExact designation and standard
Special order chemistryAs agreed for a specific mill and orderOrder-specific — not a catalogue gradeAgreed range written into the order

Evidence warning. Any equivalence between 3SP, 5SP, Q235B, S235, ASTM designations or other marks is a conditional engineering comparison, not a synonym. No chemical composition or mechanical property value is stated on this page because those depend on the governing standard edition and the order — both of which must be supplied by the buyer.

Sections — dimensional basis

Common square billet sections. The mass figure is an indicative unit mass calculated from the nominal section at steel density 7,850 kg/m³ — it is a planning aid, not an acceptance value. Tolerance and length are governed by the order.

Square billet sections with indicative unit mass and typical downstream use
Nominal sectionIndicative unit massMethod & basisTypical downstream use
100 × 100 mm≈ 78.5 kg/mCalculated from nominal section at 7,850 kg/m³Small-section and wire-rod feedstock
130 × 130 mm≈ 132.7 kg/mCalculated from nominal section at 7,850 kg/m³Bar mill and rebar feedstock
150 × 150 mm≈ 176.6 kg/mCalculated from nominal section at 7,850 kg/m³Rebar and section rolling
160 × 160 mm≈ 201.0 kg/mCalculated from nominal section at 7,850 kg/m³Heavy section and bar production
200 × 200 mm≈ 314.0 kg/mCalculated from nominal section at 7,850 kg/m³Large-section and forging feedstock

Length, straightness, corner radius and dimensional tolerance are order-specific and are confirmed against the mill's requirement — they are not stated as standard values here.

Properties — why no values are listed

Chemistry

Heat analysis limits depend on the grade designation, its standard edition and any special order agreement. None of these is fixed by the casting route.

Mechanical properties

Yield, tensile and elongation are properties of the finished rolled product under its own standard. They are not billet acceptance values.

Internal condition

Segregation, porosity and centre condition are controlled by casting practice and only assessed when the standard or order requires examination.

Stating a composition or property figure here without the governing document would create a specification the purchase order does not actually carry. Values are confirmed against your standard and the offer.

Related specification paths

3SP steel billet

A specific designation route. Its applicability depends on your governing standard — it is not a synonym for other designations.

3sp steel billet supplier

5SP steel billet

Compare against your standard before substituting; designation families are not interchangeable.

5sp steel billet supplier

150 × 150 mm billet

A single section. Confirm it suits the mill's pass schedule before committing to it.

150x150 steel billet

Quality, testing & documentation

The verification matrix

Each row below names what must be specified, the evidence to request, who owns acceptance, and the risk carried if the line is left open. A document this page cannot source is not shown as available.

Billet cross-section inspection bench with a macro examination sample beside a heat-identification tag.
Internal-quality evidence is requested when the buyer's standard, mill practice or order calls for it — not as a default on every continuous-cast lot.
Verification matrix: requirement, what the buyer must specify, evidence to request, acceptance owner and the risk if missing
RequirementBuyer must specifyEvidence to requestAcceptance ownerRisk if missing
Heat chemistryGrade designation plus the exact standard edition, or an agreed special-order rangeHeat analysis / mill test certificateBuyer's technical authorityHeat cannot be accepted or rejected against an undefined requirement
Section & lengthNominal section, cut length and the mill's pass scheduleDimensional record against the orderReceiving millBillet may not suit the mill's reheat and rolling setup
Surface conditionQuantified defect limits and the inspection methodVisual and dimensional inspection recordBuyer / receiving millMill and supplier apply different criteria to the same lot
Cut-end conditionTorch-cut, dressed, sheared or cold-cut, and the acceptance for eachCut-condition record where specifiedReceiving millCut-end defects become a dispute at the mill gate
Internal qualityWhether macro, segregation or volumetric examination is required — and to what criterionMacro examination or examination report, when the order requires itBuyer's technical authorityUnnecessary testing is bought, or required evidence is missed
TraceabilityHow heat identity is marked and what it must surviveHeat number on bundle, tied to the certificateBuyer / mill quality functionA downstream defect cannot be traced back to a cast
Shipment documentsDocument set, language and issue timingCertificate, packing list, and documents per the IncotermBuyer's commercial functionRelease, clearance or payment is delayed at destination

Certification limit. This page does not assert that any certificate, approval or test report is held, issued or available. The certificate content, its issuing party and its timing are confirmed against your order. A certificate is not created here and none is implied.

Application & industry paths

Which downstream route are you actually feeding?

The downstream route decides what the billet must satisfy. Each path below maps an operating requirement to the grade, standard and acceptance implication — rather than listing generic uses.

Rebar production

Operating requirement
Chemistry tied to the reinforcing standard the finished bar must meet
Selection implication
Confirm the mill's pass schedule suits the ordered section, and that surface acceptance is defined for the rolled product.
Fit limit
The billet grade is not the rebar grade — the finished bar is qualified under its own standard.
steel billet for rebar production

Bar production

Operating requirement
Section, length and surface condition matched to the bar mill's charge
Selection implication
Cut-end and surface condition carry directly into bar surface quality — agree acceptance before dispatch.
Fit limit
Bar tolerances are set by the bar standard, not by the billet supply.
steel billet for bar production

Wire-rod production

Operating requirement
Chemistry and surface cleanliness suited to drawing
Selection implication
Surface defects propagate through drawing. Quantify the surface acceptance rather than leaving it visual.
Fit limit
Drawing performance depends on the whole route, not on the casting method alone.
steel billet for wire rod production
Cooling-bed transfer of cut continuous-cast billets toward a rolling-mill charge area.
Casting output is only one input to the re-rolling route. Reheat practice, pass design and the finished product's own standard sit between the billet and the delivered bar.

GCC markets

Destination planning for continuous-cast billet

Each destination route below handles customs, documentation and logistics inputs at country level. A named destination, port or place, an Incoterm and the importer's document and classification context are required before an offer can be written — this page makes no claim of served markets or live availability.

Before an offer: state the named destination or port, the applicable Incoterm 2020 rule, the importer's documentation and classification requirements, and confirm the tariff classification for the billet form with your own customs adviser — classification is not determined on this page.

Commercial & logistics inputs

What the quotation is written against

A billet quotation is normalised from the inputs below. Price, stock, lead time, origin and delivery dates are not stated on this page — they are confirmed against your enquiry, and no figure is invented to fill the gap.

Quantity & unit

State the quantity with its unit of measure (MT or pieces) and whether it is a single lot or a schedule.

Currency & basis

Name the currency and the commercial basis so the offer is comparable against alternatives.

Named place / port

A named port or inland delivery place is required. A country alone does not define the delivery obligation.

Incoterm 2020

Name the rule (EXW, FOB, CFR, CIF, DAP…). The rule decides who carries risk, freight and insurance at each point.

Payment & documents

State the documentary and payment requirement, and the document set the importer must receive.

Packing & handling

Bundling, tagging, lifting points and any marking requirement for the receiving mill.

Inspection scope

Which inspections apply, at whose cost, and whether a witnessing requirement exists.

Buyer-required timing

The date by which material must be at the named place — a required-on-site date, not a supplier promise.

Open items

Anything not yet decided is carried as an open item in the enquiry, never assumed on your behalf.

Quote required. Price, availability, lead time and origin are confirmed against your enquiry. They are deliberately not stated on this page because a figure published without a live basis would misstate what an order actually carries.

Alternatives & technical resources

Close the remaining gaps

Grouped by what they resolve: the product hierarchy you sit inside, the calculation resources that reduce ambiguity, and the sibling material routes worth weighing.

Product hierarchy

Technical resources

Material route

Downstream routes

Expert insight

Which acceptance checks should change when billet is continuously cast for a specific rolling route?

Source-backed procurement decision note

What the source establishes

The continuous-casting process transforms molten steel into a solid semi-finished shape — the billet. That is the scope the source supports: what the route is and how the semi-finished product is produced.

What the source does not establish

It does not define purchase tolerances, defect limits, chemistry ranges or a universal quality class for billet. Casting is a forming route, not a grade. No acceptance value can be derived from the route description alone.

The order-specific implication

Which checks change is decided by the downstream route and the buyer's own standard — not by the fact of casting. For a re-rolling route, the load-bearing checks are chemistry against the governing standard, section and cut length against the mill's pass schedule, and cut-end and surface condition against an agreed criterion. Internal-quality evidence is added only when the standard, mill practice or order calls for it.

Buyer implication. Specify the downstream risk and the evidence needed to control it. Do not treat continuous casting as proof of chemistry, defect limits or finished-product compliance.

Primary source

steeluniversity — Continuous Casting module

steeluniversity / World Steel Association. Method: the source scope is compared against the buyer decision; source-backed facts are separated from order-specific ones.

Scope & limitations

Information date
2026-10-03
Scope
Establishes that continuous casting transforms molten steel into a solid semi-finished shape. Does not define purchase tolerances or a universal quality class.
Limitations
The source does not establish inventory, price, lead time, origin, certification or market coverage for any supplier. Those remain quotation- and evidence-dependent.

This note is an engineering aid for framing your own acceptance plan. It is not a certificate, an inspection report or a statement of compliance.

Buyer advantages

What a buyer can actually rely on

Each line maps a real procurement concern to a verifiable capability or a named evidence requirement — and then to what you can do with it. No superiority claim is made that is not tied to a check you control.

“Will the billet actually suit my mill?”

Section, length and chemistry are agreed against the downstream mill's rolled product rather than a catalogue entry.

You can state the downstream product in the enquiry and hold the offer to it.

“Can I rely on the certificate?”

The certificate content, issuing party and timing are named against your order — never asserted as held.

You know which document to request and from whom, before release.

“Will surface and cut ends be disputed?”

Surface and cut-end acceptance is quantified in the enquiry, with the inspection method stated.

Acceptance is judged against a written criterion rather than an opinion at the gate.

“Am I buying testing I don't need?”

Internal-quality examination is requested only when your standard, mill practice or order requires it.

The inspection scope matches the actual downstream risk instead of defaulting to a blanket test.

“Can I trace a problem back?”

Heat identification, its physical marking and what it must survive are agreed before dispatch.

A downstream quality issue can be traced to a cast rather than to a whole consignment.

“Am I getting assumptions instead of facts?”

Where a value cannot be sourced, it is shown as order-dependent or quote-required rather than filled in.

Nothing in the enquiry looks settled that your documents have not actually settled.

From enquiry to delivery

Who owns each step

A route-aware workflow. Every stage names the buyer concern, the input required, the evidence or output produced, the risk carried and the next action.

  1. Stage 1

    Enquiry

    Buyer concern
    Is there enough to quote against?
    Required input
    Product, grade or chemistry basis, section, length, quantity, destination
    Output
    A normalised enquiry record
    Risk
    An incomplete enquiry returns assumptions rather than an offer

    Next: Complete the acceptance matrix and carry it into the RFQ

  2. Stage 2

    Technical review

    Buyer concern
    Does the route suit the mill?
    Required input
    Downstream product and the mill's pass schedule
    Output
    Acceptance plan and inspection hold points
    Risk
    A billet that does not suit the mill's setup is discovered late

    Next: Confirm the section and length against the mill

  3. Stage 3

    Grade confirmation

    Buyer concern
    Is the chemistry basis defined?
    Required input
    Governing standard and edition, or an agreed special-order range
    Output
    Chemistry basis recorded in the enquiry
    Risk
    Heat analysis cannot be assessed against an undefined requirement

    Next: Attach the controlling standard to the RFQ

  4. Stage 4

    Quotation

    Buyer concern
    On what basis is the offer made?
    Required input
    Named place or port, Incoterm 2020, currency, document set
    Output
    A comparable offer with open items listed
    Risk
    A country-only destination leaves the delivery obligation undefined

    Next: Compare the offer against the alternatives on this page

  5. Stage 5

    Production & packing

    Buyer concern
    Will the lot match the order?
    Required input
    Confirmed section, length, packing, tagging and marking requirements
    Output
    Bundled, heat-tagged and weighed lot
    Risk
    Heat identity is lost between the cast and the bundle

    Next: Verify tagging against the agreed traceability line

  6. Stage 6

    Inspection & documents

    Buyer concern
    Is the evidence complete?
    Required input
    Inspection scope and the required document set
    Output
    Certificate and inspection records per the order
    Risk
    Release, clearance or payment is delayed at destination

    Next: Check the document set against the enquiry before dispatch

  7. Stage 7

    Shipment

    Buyer concern
    Who carries risk, and when?
    Required input
    Incoterm rule and the named place or port
    Output
    Freight and insurance arranged to the agreed point
    Risk
    Risk transfers at a point the buyer did not expect

    Next: Confirm the risk-transfer point in writing

  8. Stage 8

    Receipt at mill

    Buyer concern
    Does the lot pass acceptance?
    Required input
    Agreed surface, cut-end and dimensional acceptance criteria
    Output
    Accepted lot, or a documented non-conformity
    Risk
    Acceptance is judged against an unwritten criterion

    Next: Close out against the acceptance plan built on this page

Buyer FAQ

Questions that decide the order

Technical and commercial questions from the rolling-mill and technical-buying perspective — after the selection decision, not before it.

Does continuous casting define a steel grade?

No. Continuous casting is a forming route: it turns molten steel into a solid semi-finished shape. The grade is set by the chemistry established in steelmaking and by the designation and governing standard your order names. A casting route description is not evidence of grade compliance, and it cannot be used to accept or reject heat analysis on its own.

When is macrostructure or internal-quality evidence worth specifying?

When your governing standard, your mill's practice or the order actually requires it — for example where internal soundness is order-critical, as it often is for forging stock. If none of those call for it, requesting macro or volumetric examination by default buys testing that does not control a risk you have. State the requirement, the sample and the acceptance criterion together, or the evidence is not assessable.

How should torch-cut ends and surface defects be handled in an RFQ?

State the cut condition explicitly — torch-cut as-cast, torch-cut dressed, sheared or cold-cut — because each carries different downstream consequences. Then quantify the surface acceptance rather than leaving it visual: name the defect limits, the inspection method and who inspects. An unquantified acceptance criterion does not resolve a dispute, it postpones it to the mill gate.

What traceability should follow a billet heat into the rolling mill?

At minimum, a heat number physically marked on each bundle and tied to the certificate. Where the downstream risk warrants it, extend that to strand and cut-sequence identification. Agree how the marking is applied and what it must survive in transport and storage, because traceability that is lost between the cast and the charge cannot support a quality investigation.

Can continuous-cast billet be accepted on chemistry alone?

Chemistry alone leaves surface condition, cut-end condition, dimensional conformity and, where applicable, internal quality unaddressed. Those are separate acceptance lines with separate evidence. Acceptance on chemistry only is a decision to carry the remaining risk unmanaged — sometimes reasonable, but it should be a stated decision rather than an omission.

Qualified RFQ

Send the enquiry against a defined acceptance plan

The more of the payload below you supply, the more of the offer is an answer rather than an assumption. Anything you have not decided is carried as an open item — never filled in for you.

  • Product and entity
  • Grade / standard, or chemistry basis
  • Section and cut length
  • Quantity with unit of measure
  • Destination and named place or port
  • Incoterm 2020
  • Required documents
  • Your required timing

The RFQ is submitted to the Steel Billet enquiry intake. Your acceptance-matrix answers travel with it.

Contact the commercial department

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Address
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A technical-review path is available at organisation level through the commercial department. No individual contact is named on this page.