ISO 9649:2023 PDF

Metallic materials — Wire — Reverse torsion test

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Title (English):

ISO 9649:2023

Metallic materials — Wire — Reverse torsion test

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 4
Publication date:: May 15, 2023
Edition:: ISO IS 9649 edition 3 version 1
ICS:: 77.040.10

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Description (English):

This document specifies a method for determining the ability of metallic wire, of diameter dimension from 0,3 mm to 10,0 mm inclusive, to undergo plastic deformation during reverse torsion. This test is used to detect surface defects, as well as to assess ductility.

Technical details

Technical committee: ISO/TC 164/SC 2 - Ductility testing
SKU: ISO 9649:2023

Abstract

Overview

ISO 9649:2023 - Metallic materials - Wire - Reverse torsion test defines a standardized method to determine the ability of metallic wire (diameter 0.3 mm to 10.0 mm inclusive) to undergo plastic deformation under alternating torsion. The reverse torsion test is used primarily to detect surface defects and to assess wire ductility and overall quality. This third edition (2023) updates the 2016 version and clarifies test reporting and certain procedural details.

Keywords: ISO 9649:2023, reverse torsion test, metallic wire testing, wire ductility, surface defect detection, wire quality control.

Key topics and technical requirements

Scope: Applies to round wires with nominal diameters from 0.3 mm to 10.0 mm for detecting surface defects and assessing ductility.
Test principle: Twist the specimen a specified number of full turns (360° per turn) in one direction, then the specified number in the opposite direction.
Test piece preparation:
- Wire must be as straight as possible; straightening is allowed provided the surface is not damaged and no twisting is introduced.
- Wires with local kinks or sharp curvature must not be used.
Free length between grips (L): Specified as a function of nominal diameter (d):
- 0.3 ≤ d

Related standards

Other ISO standards

Overview

Keywords: ISO 9649:2023, reverse torsion test, metallic wire testing, wire ductility, surface defect detection, wire quality control.

Key topics and technical requirements

Scope: Applies to round wires with nominal diameters from 0.3 mm to 10.0 mm for detecting surface defects and assessing ductility.
Test principle: Twist the specimen a specified number of full turns (360° per turn) in one direction, then the specified number in the opposite direction.
Test piece preparation:
- Wire must be as straight as possible; straightening is allowed provided the surface is not damaged and no twisting is introduced.
- Wires with local kinks or sharp curvature must not be used.
Free length between grips (L): Specified as a function of nominal diameter (d):
- 0.3 ≤ d

ISO 9649:2023 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

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Overview

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