ISO 8494 describes a flanging test method used to evaluate how a metallic tube end forms a flange without cracking or other unacceptable damage. It is commonly referenced when tube products must demonstrate formability for fittings, flared/rolled ends, and end-forming operations.
This method is primarily used for circular metallic tubes and is often paired with product-specific requirements that define the target flange size and acceptance criteria. If you need help matching the correct edition and setup to your tube specification, contact our team.
ISO 8494:2013 — Metallic materials — Tube — Flanging test
ISO 8494:2013 is an International Standard that specifies a method for determining the ability of metallic tubes of circular cross-section to undergo plastic deformation during flange formation.
| Item | Details |
|---|---|
| Standard | ISO 8494:2013 (Edition 3) |
| Title | Metallic materials — Tube — Flanging test |
| Intended tube range (typical) | Outside diameter ≤ 150 mm; wall thickness ≤ 10 mm (unless a relevant product standard specifies otherwise) |
Quick definition
What it is: A tube end-forming test method focused on flange formation.
What it measures: Whether a tube can plastically deform into a flange to a defined size without unacceptable cracking or damage.
Where it is used: Tube qualification, incoming inspection, process validation, and comparative formability checks for tube products that will be flanged or end-formed.
What This Standard Covers
ISO 8494 specifies the test approach for forming a flange at the end of a metallic tube and evaluating the tube’s ability to withstand the required deformation. The standard is intended for metallic tubes of circular cross-section, and the applicable size range may be further limited or defined by a relevant product standard.
In many purchasing and QA/QC workflows, the product standard (or drawing/specification) sets the required flange geometry, acceptance criteria, and any test-specific details that go beyond the base method.
Why This Standard Matters in Testing
Tube flanging is a common manufacturing operation for creating functional end features for joining, sealing, and assembling tube components. A standardized flanging test supports consistent comparisons between materials, suppliers, heats/lots, and processing conditions.
For labs and production quality teams, ISO 8494 is often used as a practical indicator of end-forming robustness, helping reduce risks such as edge cracking during forming, assembly rework, or leakage issues linked to damaged flange regions.
Common Materials, Product Types, or Applications Covered
ISO 8494 applies to metallic tubes (circular cross-section) where flange formation is a relevant manufacturing or assembly step.
- General metallic tubing used in mechanical assemblies where ends are formed for joining
- Tube products where end-forming performance is a specification requirement (with acceptance criteria typically defined by a relevant product standard)
- Production environments validating forming capability after changes in material, heat treatment, or forming process conditions
Common Test or Verification Workflow
ISO 8494 is typically used as a method referenced by a tube product standard or customer specification.
Common workflow: Select tube test pieces per the governing product requirement, form a flange to the specified condition, then evaluate the test piece for acceptance (often including visible cracking or other defined reject conditions).
Practical note: Because product standards may set the target flange dimensions and pass/fail criteria, matching your tooling and measurement approach to the cited requirement is as important as the base method itself.
Equipment Commonly Used for This Standard
ISO 8494 is an end-forming test, so equipment selection typically centers on controlled forming and repeatable tooling geometry rather than a high-force tensile/compression frame.
Common equipment and tooling: A suitable press or forming system, flanging tooling, and a mandrel/drift-style forming element (as applicable), along with basic dimensional measurement tools to verify flange dimensions required by the governing specification.
Quoting tip: Capacity, stroke, guarding, and tooling details often depend on tube diameter, wall thickness, and the flange size requirement. If you are specifying a system for repeated testing, you can request a detailed quote with your tube range and the cited acceptance requirements.
How to Read This Designation or Revision
ISO 8494:2013 identifies the ISO standard number (8494) and the year of publication (2013). For procurement documents and test reports, the year matters because tooling details, applicability limits, and reporting expectations can differ by edition.
If a customer specification cites ISO 8494 without a year, align on the required edition before finalizing procedures, fixtures, and reporting.
Related Standards, Methods, or Frameworks
Tube formability is often evaluated using multiple complementary tube tests. Depending on the product and end-use, additional tube test methods may be referenced alongside ISO 8494.
- ISO 8493 (tube drift-expanding test)
- ISO 8495 (tube ring-expanding test)
Talk to a test equipment specialist
If you need help selecting a press, control approach, or tooling concept for ISO 8494 work (or for a product standard that references it), talk with our team and share your tube size range and the flange requirement you are targeting.