EN 319 — Tensile strength perpendicular to the plane (internal bond) for wood-based panels

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EN 319 is the test method for determining tensile strength perpendicular to the plane of a panel, commonly called internal bond (IB) strength, used for wood-based and similar panels. To match a setup to this test, talk with our team.

What EN 319 Measures

The test pulls a panel sample through its thickness to measure how well the panel holds together internally. Low internal bond indicates weak bonding or a poor core, which affects panel durability and machining.

How the Test Is Run

A square sample is bonded to two loading blocks and pulled perpendicular to the panel faces until it fails within the panel. The maximum load divided by the area gives the internal bond strength.

Preparing Specimens

Accurate sample size and a sound bond to the blocks are essential. To set up internal bond testing, request a quote.

Reading the Designation

Cited as EN 319 with its year. Confirm the edition and sample dimensions.

Related Standards

ASTM C297 measures a comparable flatwise (through-thickness) tensile strength for sandwich constructions.

Request a Quote

Testing panel internal bond strength? Request a quote and our team will help you build a system matched to your panel type and bonding fixtures.

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Build your EN 319 workflow with TensileMill CNC

TensileMill CNC builds testing systems used across quality control, research, and production. For this work we supply universal testing machines, wedge or pneumatic grips, and flat and round specimen-preparation systems. Tell us your materials, specimen forms, and required test sections, and our team will match the right configuration.