Repeatable roll bending output
Roll bending is selected for long arcs, cylinders and large-radius curves where continuous forming is more efficient than discrete bends.
Procurement Promise
Fewer decorative images, more usable RFQ information
This page is structured for buyers who need a quotation quickly. Send grade, thickness, drawing revision, quantity, critical dimensions, edge condition and inspection needs together so the roll bending route, tooling, tolerance approach and secondary operations can be reviewed before the quote is released.
Common grades304/304L · 316/316L201, 430 and duplex grades by project review
Starting formsSheet & plateFlat products are the standard quoting basis
Thickness guide0.5–20 mm typical RFQ rangeThicker material requires capability confirmation
Sheet envelopeUp to 1500 × 3000 mm typical basisLarger format is reviewed before quotation
Tolerance guideFrom ±0.10 mm on suitable geometryFinal tolerance is drawing- and thickness-dependent
Edge conditionAs-cut · deburred · edge breakProcess setup and edge control are reviewed for clean, consistent Roll Bending output.
MOQPrototype to batch quantityCommercial minimum depends on nesting and setup
Lead timeConfirmed after drawing reviewMaterial, quantity and secondary operations control schedule
Decision Summary
When stainless steel roll bending is the right process
Roll Bending is strongest when the part is fundamentally a 2D profile in sheet or plate and the buyer needs repeatable geometry, efficient nesting and a controlled edge condition without tooling for every new shape. For projects involving roll bending stainless steel, grade, thickness, gas, tolerance and edge acceptance should be reviewed together. Buyers comparing a stainless roll bending supplier should also verify equipment envelope, inspection method, drawing control, capacity, MOQ and lead time.
Recommendation first
Use roll bending for long arcs, cylinders and large-radius curves where continuous forming is more efficient than discrete bends. Review another process when the design requires short straight flanges, axisymmetric spinning or heavy plate shells outside the confirmed mill envelope.
Process setup and edge control
Roll bending is repeatable when roll diameter, pass schedule, side guides and springback compensation are controlled. Confirm radius, ovality and seam alignment before release.
Choose by the constraint
Press brake bending suits short straight flanges; plate rolling suits heavier plate shells; welding and machining may follow forming.
Material Matrix
Grades, thicknesses and surface conditions commonly quoted
The matrix below is a practical RFQ starting point rather than a live inventory statement. Actual sourcing route, cutting envelope and finish protection are confirmed against the drawing and current material availability.
Core grades304/304L and 316/316L
These grades cover a large share of fabricated stainless panels, brackets, covers and equipment parts.
Starting formCold-rolled sheet & hot-rolled plate
Choose the starting surface according to cosmetic, corrosion and downstream fabrication requirements.
Protection optionsFilm, paper interleave or clean packing
Cosmetic faces should be identified on the drawing so handling and packing can be planned before cutting.
| Grade / family | Starting form | Typical thickness guide | Common surface | RFQ status | Notes for roll bending |
|---|---|---|---|---|---|
| 304 / 304L | Cold-rolled sheet | 0.5–3.0 mm | 2B, BA, No.4, protected surface | Regularly sourced | Roll gap, pass schedule and side-guide control are specified where stable radius and low ovality are required. |
| 304 / 304L | Plate | 3–20 mm | No.1 / pickled or project finish | Thickness review | Edge quality, surface or edge variation and achievable tolerance become more thickness-sensitive as plate gets heavier. |
| 316 / 316L | Cold-rolled sheet | 0.5–3.0 mm | 2B, BA, No.4, protected surface | Regularly sourced | Suitable where improved corrosion resistance is required; cosmetic faces should be called out on the drawing. |
| 316 / 316L | Plate | 3–20 mm | No.1 / pickled or project finish | Thickness review | Confirm edge acceptance, flatness and any post-cut passivation or finishing requirement before order release. |
| 201 / 430 | Sheet | 0.5–6.0 mm | 2B, BA, No.4 | Project review | Grade selection should be based on corrosion environment, forming demand and magnetic requirement rather than price alone. |
| Duplex 2205 | Sheet / plate | 1–16 mm | 2B or No.1 where available | Project-specific | Material sourcing, process parameters and downstream welding requirements should be reviewed together. |
Important: the listed ranges are quoting guidance, not a claim of real-time stock or a guaranteed machine limit. Final availability and process capability must be confirmed on the approved quotation.
Processing Capability
From drawing review to roll bending inspection
The useful capability statement is not only machine power. A quote should connect material thickness, part geometry, coolant or lubrication, edge requirement, tolerance, inspection method and file revision so the buyer knows what will actually be accepted.
01Drawing review
Confirm revision, material, thickness, critical dimensions, cosmetic faces and acceptance notes.
02Nesting & CAM
Review part orientation, web spacing, kerf compensation and sheet utilization before release.
03Roll Bending
Select parameters and process support according to grade, thickness and required edge condition.
04Edge finishing
Keep as-cut edges or apply deburring / edge break where the drawing or handling requirement calls for it.
05Inspection & packing
Verify defined features, protect cosmetic surfaces and package parts according to shipment needs.
| Process item | Method / equipment class | Typical quoting envelope | Expected result | Inspection / control |
|---|---|---|---|---|
| Blank preparation | Three-roll bending cell | 1–20 mm sheet or plate; width, diameter and minimum radius confirmed per part | Stable cylindrical or curved form with controlled springback | First-piece radius checks, ovality review and final dimensional inspection |
| Radius / roundness | Roll gap, pass schedule and side-guide control are specified where stable radius and low ovality are required. | Grade and thickness dependent | Supports stable forming, surface condition and downstream finishing | Radius, ovality and seam alignment checked with templates, calipers and the approved drawing. |
| Radius / roundness | Geometry-specific parameter review | Features close to the forming limit require review | Radius, ovality, edge condition and seam alignment checked with templates, calipers and the approved drawing. | Radius, ovality, edge condition and seam alignment checked with templates, calipers and the approved drawing. |
| Deburring / edge break | Mechanical or manual finishing as specified | Selected cut parts or full lot | Removes loose burrs and protects handling surfaces before assembly | First-piece radius checks, ovality review and final dimensional inspection |
| Drawing data | CAM + engineering review | DXF / DWG preferred for 2D; STEP / PDF for verification | One controlled geometry source with dimensions and notes cross-checked before production | Revision control and file-name check at order release |
Equipment / process cell
Representative process image showing the equipment or finished result; confirm the verified work envelope and responsible process owner in the quotation.
Process result / inspection evidence
One representative photo can show the cut edge, cosmetic handling and the inspection method used for released parts.
Capability note: final machine envelope, tolerance and secondary operation availability must be stated on the quotation. Do not treat the general guidance on this page as an order acceptance without drawing review.
Applications & Limits
Match the process to the part, surface and service environment
Roll Bending is a manufacturing process, not a substitute for material selection. The grade must still be chosen for corrosion, temperature, cleaning, strength and fabrication requirements.
Equipment panels & enclosures
Roll bending forms strip or plate through controlled passes; confirm roll diameter, pass schedule, side guides and springback compensation before release.
Food & hygienic equipment parts
316L or other suitable grades may be selected where corrosion and cleaning demands are higher. Edge and surface finishing still need separate specification.
Architectural & decorative panels
Good for repeated patterns and custom openings. Cosmetic face, film direction and scratch protection should be identified before nesting.
Brackets, shims & machine guards
Roll Bending supports frequent design changes without dedicated blanking dies and works well for mixed small and medium batch profiles.
Electrical & instrument housings
Roll bending is selected for long arcs, cylinders and large-radius curves where continuous forming is more efficient than discrete bends.
Prototype-to-production parts
The same digital geometry can support early prototypes and later batch production, provided revision control and material condition remain consistent.
Limitations that should be reviewed before RFQ release
Radius / roundness
Radius, ovality and seam alignment checked with templates, calipers and the approved drawing.
Process selection and forming limits
Roll Bending is a thermal process. If the application requires no thermal influence at the edge, waterjet or machining may be a better route.
High load or tight forming requirements
As thickness and part size increase, forming load, springback and equipment envelope become more important. Define the acceptance criteria and any machining allowance before quotation.
Cosmetic surfaces where scratches are unacceptable
Specify the visible face, protective film requirement, handling method and packing expectation. Cutting quality alone does not control cosmetic handling damage.
Tight final dimensions after bending or welding
Roll-bent blank dimensions do not automatically guarantee final assembly dimensions. Springback, edge wave and seam fit-up must be included in the overall tolerance strategy.
Tolerance, QA & Acceptance
Define what is measured, how it is measured and what documents are required
A tolerance value only becomes useful when it is connected to the material thickness, feature type, inspection method and drawing revision. Critical dimensions should be identified rather than applying the tightest tolerance to every cut edge.
QA 01Material identity
Confirm grade, thickness, heat/lot data and requested MTC before production.
QA 02Revision control
Match DXF/DWG geometry to the dimensioned PDF and approved revision.
QA 03First-piece check
Measure the critical dimensions defined for production release.
QA 04In-process check
Monitor edge condition, repeat features and surface protection during the run.
QA 05Final acceptance
Complete final checks and attach the agreed material / inspection documents.
Typical RFQ forming and tolerance starting points
| Material / feature | Starting guidance | What changes it |
|---|---|---|
| 0.5–3 mm sheet profile | Approx. ±0.10 to ±0.20 mm | Part size, contour complexity, thermal concentration and surface condition |
| 3–10 mm plate profile | Approx. ±0.15 to ±0.30 mm | Thickness, edge taper, part size and cut sequence |
| 10–20 mm plate profile | Approx. ±0.25 to ±0.50 mm | Thickness, tooling or pass method, surface or edge variation acceptance and geometry |
| Arc transitions / seam alignment | Review individually | Feature size relative to thickness, hole roundness and measurement method |
| Critical radius / datum | Drawing-specific | Datum strategy, overall part size and inspection capability |
Inspection and document package
Dimensional inspection report
Critical features can be recorded with the agreed sampling plan and drawing revision.
Material Test Certificate (MTC)
Request the applicable material certificate and traceability requirement in the RFQ.
Certificate of Conformance
Available only when it is included in the quotation and order document package.
Visual / edge acceptance
Define burr, surface or edge variation, oxide, scratch and cosmetic face requirements when they matter to use or appearance.
Inspection method
Calipers, micrometers, pin gauges, height gauges, fixtures or CMM may be selected according to feature type and required uncertainty.
Tolerance disclaimer: these ranges are general RFQ guidance, not a guaranteed capability for every part. The accepted tolerance is the value stated on the reviewed quotation and approved drawing.
Standards & Equivalence
Use the requested material standard and grade designation on the RFQ
Equivalent grade names are useful for communication, but they are not automatically interchangeable. Chemistry, mechanical properties, product form, heat treatment and the governing product standard must align with the purchase requirement.
| Common grade | UNS | EN designation | JIS | Common GB designation | Typical flat-product standards |
|---|---|---|---|---|---|
| 304 | S30400 | 1.4301 | SUS304 | 06Cr19Ni10 | ASTM A240/A240M, EN 10088-2, JIS G4304/G4305, GB/T 4237 or GB/T 3280 as applicable |
| 304L | S30403 | 1.4307 | SUS304L | 022Cr19Ni10 | Product standard must match the required form and delivery condition |
| 316 | S31600 | 1.4401 | SUS316 | 06Cr17Ni12Mo2 | Verify molybdenum-bearing grade requirement and requested certification |
| 316L | S31603 | 1.4404 | SUS316L | 022Cr17Ni12Mo2 | Commonly specified where low carbon content supports welding / corrosion requirements |
| 430 | S43000 | 1.4016 | SUS430 | 10Cr17 | Ferritic stainless; application environment and forming demand should be checked |
| Duplex 2205 | S32205 / S31803 | 1.4462 | SUS329J3L family | 022Cr23Ni5Mo3N family | Confirm exact chemistry / strength requirements and product standard before substitution |
- ASTM A240/A240MChromium and chromium-nickel stainless steel plate, sheet and strip for pressure vessels and general applications.
- EN 10088-2Technical delivery conditions for stainless steel sheet/plate and strip for general purposes.
- JIS G4304 / JIS G4305Hot-rolled and cold-rolled stainless steel plate, sheet and strip.
- GB/T 4237 / GB/T 3280Hot-rolled and cold-rolled stainless steel plate, sheet and strip.
- ISO 9013Thermal cutting quality classification can be referenced where the drawing or purchase specification calls for it.
Equivalence is a starting point, not a substitution approval
Do not substitute one designation for another only because the names appear in the same row.
Confirm chemistry, mechanical properties, corrosion requirement, product form, thickness range, surface condition and certification against the governing purchase standard.
Worked Example
How a 316L mounting-plate RFQ can be converted into a roll bending plan
This is a worked engineering example, not a named customer claim. It shows the information that should be resolved before a Roll-bent stainless part is released for production.
Example RFQ inputs
- PartControl cabinet panel
- Material316L stainless sheet
- Thickness2.0 mm
- Blank sizeApprox. 650 × 420 mm
- Quantity120 pcs
- Surface2B, one cosmetic face protected
- Critical dimsSelected features at ±0.15 mm
- FilesDXF + dimensioned PDF
Problem
Radius / roundness
The geometry favors a multi-pass roll process because long radii and cylindrical sections can be formed continuously with controlled springback.
Constraints
Cosmetic face, critical hole locations and downstream bending
The drawing should identify the visible face, bend relationship and which dimensions remain critical after later forming operations.
Decision
Roll Bending process setup + edge control
Use nitrogen for a cleaner stainless edge, preserve surface protection according to the approved process plan and deburr only where the drawing or handling requirement needs it.
Inspection
First-piece verification focused on critical features
Radius, ovality, edge condition and seam alignment checked with templates, calipers and the approved drawing.
Release
Quote and order lock the final acceptance criteria
Production should follow the approved revision, accepted tolerance, material certification requirement, edge condition, packing method and agreed inspection record.
For publication as a first-party case study, replace this worked example with a verified order or project record and only state outcomes that can be supported by internal evidence and permission.
Technical Basis & Review
Standards, process evidence and document control
Material-standard facts should come from the governing standards, while process capability should come from verified equipment, inspection records and approved internal data. Recommendations should be separated from guaranteed order requirements.
Reference basis used for this page
- ASTM A240/A240M — stainless steel plate, sheet and strip product requirements where applicable.
- EN 10088-2 — technical delivery conditions for stainless steel sheet/plate and strip for general purposes.
- JIS G4304 / JIS G4305 — hot-rolled and cold-rolled stainless steel plate, sheet and strip.
- GB/T 4237 / GB/T 3280 — hot-rolled and cold-rolled stainless steel plate, sheet and strip.
- ISO 9013 — thermal cut quality classification where invoked by the drawing or purchase specification.
- Company capability evidence — machine envelope, assist-gas practice, cut samples, inspection records and quoted tolerance must be verified internally before indexing.
Page ownership
Update log: 2026-09-10 — initial T07 build for stainless steel roll bending service RFQ intent.
Technical RFQ
Request a stainless steel roll bending quote
Send the drawing and the commercial requirements together. The more complete the input, the faster the process route and acceptance criteria can be reviewed.
- Grade, product standard and thickness
- DXF / DWG / STEP plus dimensioned PDF
- Quantity, prototype/batch requirement and destination
- Critical dimensions and any GD&T / datum requirements
- Edge condition, cosmetic face and protective film need
- Secondary operations such as deburring, forming or finishing
- MTC, inspection report, CoC or traceability requirement
- Required delivery date and packaging notes
File upload: include the latest drawing revision only. Avoid sending conflicting geometry files without a clear revision note.
Send your drawing and quote requirements
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