DIN 50151 is a withdrawn DIN test method that describes a bend test with fine measurement for thin sheet, strip, and band used for manufacturing springs.
It is typically referenced when qualifying spring strip behavior in a defined thickness range (0.05 mm to 1.0 mm), especially for legacy drawings, customer specifications, or long-running production programs. If you need help mapping a legacy callout to today’s lab setup, you can talk with our team.
DIN 50151: Testing of metallic materials; bend testing of thin spring sheet and strip (withdrawn)
DIN 50151 is a short, legacy DIN document focused on bend testing of thin spring strip where measurement resolution matters. Because it is withdrawn, users commonly encounter it as a referenced requirement rather than a newly selected standard.
For procurement and QA/QC, the practical goal is usually to reproduce the required bending condition and measurement approach closely enough to compare batches, suppliers, tempers, or process changes.
Quick definition
DIN 50151 is a withdrawn bend-test method for thin spring sheet/strip (0.05 mm to 1.0 mm) that uses a controlled bending setup with fine measurement to evaluate spring strip bending behavior.
What this standard covers
This standard applies to thin metallic sheet, strip, and band used for manufacturing springs within a stated thickness range (0.05 mm to 1.0 mm).
Covered activity: Controlled bending of a strip specimen using a defined fixture approach, with emphasis on measurement sensitivity and repeatability for spring materials.
What it does not try to be: A general-purpose bend test for thicker plate, structural bend testing, or a full tensile-property method.
Why this standard matters in testing
For thin spring strip, small differences in forming, temper, and surface condition can show up as measurable differences during bending and after unloading. A standardized bending setup helps make incoming inspection and supplier comparisons more consistent.
Because DIN 50151 is withdrawn, the highest risk in testing is not “how to bend,” but “which procedure and measurement conventions the contract actually meant.” Matching the cited edition and the expected reporting conventions can be as important as the fixture itself.
Common materials, product types, or applications covered
DIN 50151 is most often associated with spring strip and other thin spring stock used in stamped or formed components.
Typical products: Spring bands/strips and thin spring sheet used for formed spring elements, clips, contacts, and other elastic components made from thin strip.
Common test or verification workflow
DIN 50151 is commonly used as part of a receiving inspection or process-control workflow for spring strip.
Common workflow: Identify the referenced DIN 50151 edition in the requirement → select a bending fixture suitable for thin strip → run repeated bends under controlled conditions → record the required measured values → compare to a customer/specification limit or to a qualified baseline lot.
Practical caution: For thin strip, results can be sensitive to specimen orientation, edge condition/burrs, and how the strip is supported and aligned in the fixture. Those details should be controlled and documented to keep comparisons meaningful.
Equipment commonly used for this standard
DIN 50151 points to a controlled bend-test setup designed for thin strip and fine measurement rather than high-force loading.
Common equipment: Bend test fixture sized for thin strip (supports and bending tool/mandrel arrangement), a stable loading frame or test stand (often a universal testing machine or dedicated bending device), and measurement tools suited to small deflections/angles (depending on what the requirement calls out).
What buyers usually need to decide early: Specimen thickness range and width, the fixture geometry needed to match the requirement, and how measurements will be captured and reported (manual vs. instrumented).
If you are selecting a fixture and need a configuration matched to your strip thickness and reporting needs, you can request a detailed quote.
How to read this designation or revision
DIN standards are often cited with an issue date. A common citation format is “DIN 50151:1987-07,” where the suffix indicates the year and month of issue.
Revision sensitivity: Because DIN 50151 is withdrawn, it is important to capture the exact cited edition (and any customer-specific exceptions) before finalizing fixtures, measurement approach, or reporting templates.
Related standards, methods, or frameworks
DIN 50151 is listed as withdrawn and is commonly associated with later European methods for determining spring bending behavior on strip.
Often-cited related document: DIN EN 12384 (spring bending limit on strip) is widely used for similar thin-strip spring-bend evaluation. Always confirm the exact standard and acceptance criteria specified by your customer or drawing before switching methods.
Need help quoting equipment for a DIN 50151 bend-test requirement?
Share your strip thickness range, material type, and any customer acceptance limits, and we can propose a practical bend-fixture and measurement approach for your workflow. To compare equipment options and pricing, request pricing.