ISO 7800: Metallic materials — Wire — Simple torsion test

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ISO 7800 is the method for a simple torsion test on metallic wire, defining a controlled way to twist a wire specimen to assess ductility and surface soundness. To match this to your program, talk with our team.

What ISO 7800 Covers

The torsion test twists a length of wire about its axis until a set number of turns or until failure. It reveals ductility, uniformity, and surface or internal defects that a tensile test alone may not show.

How the Test Is Run

A gauge length of wire is clamped at both ends and twisted at a controlled rate, and the number of twists to failure and the fracture appearance are recorded as measures of wire quality.

Preparing Specimens

Straight, undamaged wire lengths gripped without nicking are essential, since a surface flaw starts an early break. To configure wire torsion testing, request a quote.

Reading the Designation

Cited as ISO 7800:YYYY. Confirm the edition and the required number of twists.

Related Standards

ASTM A370 organizes the broader mechanical tests used on steel wire and products.

Request a Quote

Setting up wire torsion testing? Request a quote and our team will help you build a system matched to your wire diameter and test requirements.

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Build your ISO 7800 workflow with TensileMill CNC

TensileMill CNC designs and builds the systems labs use for standards-based mechanical testing. For this work we supply universal testing machines with wedge and tensile fixtures for fasteners, wire, and strand. Tell us your materials, specimen forms, and required test sections, and our team will match the right configuration.