DIN 54518 is a DIN test method used to determine the short-span compressive strength of paper and board (often referred to as SCT / strip compression resistance in the sheet plane). It is commonly applied to packaging papers and boards where compression performance is critical for converting and box performance.
Because SCT testing is sensitive to sample direction (machine direction and cross direction) and specimen handling, labs often standardize conditioning, sampling, and reporting to match the exact cited edition. If you need help aligning your test setup and reporting to a customer or contract requirement, talk with our team.
DIN 54518: Testing of paper and board — Compression strength, short span test
DIN 54518 defines a procedure for measuring the compressive strength of paper and board using a short free test span, producing a value that is widely used for materials selection, quality control, and process monitoring in packaging and paper production.
The method is intended for paper and board within a defined basis weight range and can be performed in both the machine direction (MD) and cross direction (CD), depending on the requirement.
Quick definition
What it is: A short-span compression test (SCT) method for paper and board.
What it measures: Maximum compressive force at failure (reported as a strength value) and, where required, an index value normalized by grammage.
Typical use: Packaging paper/board QC and performance comparisons, often alongside other compression-related measures.
What this standard covers
DIN 54518 covers short-span compression testing of paper and board in the plane of the sheet. The test is performed on narrow strips clamped between aligned jaws with a very short unsupported span, then loaded in axial compression until failure.
The standard includes requirements around specimen direction (MD and CD), sampling, conditioning, and calculation/reporting (including strength indexing where applicable).
Why this standard matters in testing
SCT results are frequently used as a fast, repeatable indicator of compressive performance for packaging papers and boards. In production environments, it supports routine QC trending and supplier/customer comparisons when the same edition and reporting basis are used.
Because the free span is very short, results can be more sensitive to clamp alignment, jaw condition, and maintenance than longer-span compression approaches. Keeping the instrument in calibration and controlling specimen preparation are key to meaningful comparisons.
Common materials, product types, or applications covered
DIN 54518 is commonly specified for paper and board used in packaging and converting, including liner and other packaging grades where compression behavior influences stacking, handling, and downstream converting performance.
It is typically applied across a broad band of packaging-relevant basis weights (within the range stated in the standard) and reported separately for MD and CD when required.
Common test or verification workflow
Most labs implement DIN 54518 within a routine paper/board QC workflow:
- Condition samples to the lab’s controlled atmosphere and follow defined sampling practices.
- Prepare strip specimens in the required orientations (MD and/or CD).
- Run a defined number of replicates per direction on a short-span compression tester.
- Calculate/report the required SCT strength value(s), and an index value when specified.
When SCT values are used for acceptance decisions or supplier qualification, matching the cited edition (including any updates to replicates, calculations, or maintenance checks) is especially important.
Equipment commonly used for this standard
DIN 54518 is most commonly performed on a dedicated short-span compression tester (often called an SCT tester). These systems generally include precisely aligned clamps/jaws, controlled loading, and software for peak force capture and reporting.
Common equipment elements: Pneumatic (or equivalent) clamping, short-span jaw set, force/load measurement and control, specimen cutting tools for repeatable strip geometry, and analysis/reporting software.
Practical selection cautions: Confirm the instrument’s jaw geometry/span configuration, alignment approach, maintenance/verification routines, and the reporting options needed for your internal specs (MD/CD, index reporting, averaging rules, and replicate count).
How to read this designation or revision
DIN standards are typically cited with an edition date. For example, “DIN 54518:2022-01” identifies the January 2022 edition.
DIN 54518:2022-01 replaces DIN 54518:2004-03, so older certificates, specs, or historical data sets may reference the prior edition. When comparing results across time or between sites, confirm that the same edition (and the same reporting basis) is being used.
Related standards, methods, or frameworks
Short-span compression testing is also covered by other widely used documents. Depending on your customer base or geography, you may see SCT requirements referenced to ISO and TAPPI methods in addition to DIN 54518.
Common cross-references: ISO 9895 (short-span compressive strength) and TAPPI T 826 (short-span compression of containerboard and related grades).
Get help configuring SCT testing for DIN 54518
If you are equipping a paper/board lab for SCT testing or updating an older setup to match a specified edition, you can request a detailed quote for an SCT configuration and accessories matched to your throughput, MD/CD workflow, and reporting needs.