ISO 20482 is the ISO test method for the Erichsen cupping test used to assess stretch-forming ductility of metallic sheet and strip.
It is commonly used in sheet-metal production and stamping-oriented quality control to compare formability between lots, suppliers, or processing conditions. If you need help matching your material, thickness range, or reporting needs to the correct setup, talk with our team.
ISO 20482: Metallic materials — Sheet and strip — Erichsen cupping test
ISO 20482 describes a standardized cupping (indentation) test for metallic sheet and strip. The test outcome is used as an indicator of how well a sheet can undergo plastic deformation in stretch forming.
The standard is widely referenced when buyers and manufacturers need a consistent, comparable formability check without running a full stamping trial.
Quick Definition
Standard type: Test method.
What it measures: Indentation (cup) depth at which a crack occurs during spherical-punch cupping, reported as an Erichsen cupping value/index (commonly shown as IE, in mm).
Typical use: Incoming inspection and process control for sheet/strip formability.
What This Standard Covers
In the Erichsen cupping test, a sheet/strip specimen is clamped and deformed by a punch to create a dome (cup). The test continues until a crack forms; the punch travel (cup depth) at crack initiation is used as the result.
ISO 20482 is written for metallic sheets and strips within a specified thickness and minimum width range, and it also provides for alternative tooling sizes when thicker material or narrower strip must be evaluated.
Why This Standard Matters in Testing
Sheet-metal forming performance can vary significantly with chemistry, rolling practice, heat treatment, coating, lubrication, and surface condition. ISO 20482 provides a repeatable way to trend stretch-forming capability and compare materials using the same punch/die concept and crack criterion.
For procurement and QA/QC teams, the cupping value is often used as a practical acceptance or benchmarking metric alongside tensile properties, hardness, or coating requirements.
Common Materials, Product Types, or Applications Covered
Common materials: Ferrous and non-ferrous metallic sheet and strip used in forming operations (for example, steels and aluminum alloys where stretch-forming behavior is important).
Common applications: Automotive and appliance panels, general stamping and drawing operations, metal packaging components, and other formed sheet products where lot-to-lot formability consistency matters.
Common Test or Verification Workflow
Most labs run ISO 20482 as a comparative, repeatable check rather than a full forming simulation.
Common workflows:
- Incoming goods inspection to compare supplier lots (pass/fail or trending against a target IE value).
- Process validation after rolling, annealing, or coating changes.
- R&D screening to compare candidate sheet materials for stretch-forming robustness.
What to control carefully: Clamping/blank-holder conditions, tooling geometry, punch speed, and crack-detection criteria can affect results, so procedures and reporting are typically tied closely to the cited edition of the standard.
Equipment Commonly Used for This Standard
ISO 20482 typically points to a dedicated cupping/formability tester or a press-based setup designed for Erichsen cupping. The key requirement is a controlled punch-and-die system that clamps the specimen and measures punch travel accurately up to crack initiation.
Common equipment: Erichsen cupping test machines (manual or electro-hydraulic), standardized punch/die/blank-holder tooling sets, displacement measurement for cup depth, and (when required) force measurement at tearing.
If you are selecting a cupping tester, tooling set, or a configuration that matches your sheet thickness range and desired outputs (depth-only vs. depth + force), you can request a detailed quote for an equipment package aligned to ISO 20482-style testing.
How to Read This Designation or Revision
Designation format: ISO 20482:2013 indicates ISO standard number 20482 with the 2013 edition year.
Revision sensitivity: Cupping tests are sensitive to tooling and procedural details, so purchase specifications and lab reports should cite the full designation (including the year) to avoid mismatches.
Regional adoptions: You may also see the same method referenced as EN ISO 20482 in European purchasing documents.
Related Standards, Methods, or Frameworks
Depending on customer or regional requirements, Erichsen-style cupping may be referenced alongside other national or industry documents for sheet-metal formability testing.
Often-cited related documents: DIN 50101 (Erichsen cupping context) and ASTM E643 (Olsen-style cupping) are commonly mentioned in the same equipment/application space, but the tooling and reporting requirements should be treated as standard-specific.
Need help scoping an ISO 20482 test setup?
If you need to align a cupping tester, tooling, and measurement outputs to the edition your customer cites (and to your sheet thickness/width range), contact our team to talk through your application and quoting requirements.