ISO 9649:2023 PDF
Metallic materials — Wire — Reverse torsion test
Metallic materials — Wire — Reverse torsion test
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 4
- Дата публикации:
- 15 мая 2023 г.
- Издание:
- ISO IS 9649 edition 3 version 1
- ICS:
- 77.040.10
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.
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
Технические детали
- Технический комитет
- ISO/TC 164/SC 2 - Ductility testing
- SKU
- ISO 9649:2023
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