ISO/FDIS 26843

Metallic materials — Measurement of fracture toughness of steels at impact loading rates using precracked Charpy specimens

ISO 26845:2009 specifies requirements for performing and evaluating instrumented precracked Charpy impact tests on steels using a fracture mechanics approach. Minimum requirements are given for measurement and recording equipment, such that similar sensitivity and comparable measurements are achieved. ISO 26845:2009 can be applied to other metallic materials by agreement. Dynamic fracture mechanics properties determined using ISO 26845:2009 are comparable to conventional large-scale fracture mechanics results when the corresponding validity criteria are met. Because of the small absolute size of the Charpy specimen, this is often not the case. Nevertheless, the values obtained can be used in research and development of materials, in quality control and service evaluation and to establish the variation of properties with test temperature under impact loading rates.

Matériaux métalliques — Mesure de la ténacité à la rupture d'éprouvettes Charpy préfissurées en acier soumises à des charges dynamiques

General Information

• Status: Withdrawn
• ICS: 77.040.10 - Mechanical testing of metals
• Technical Committee: ISO/TC 164/SC 4 - Fatigue, fracture and toughness testing
• Drafting Committee: ISO/TC 164/SC 4 - Fatigue, fracture and toughness testing
• Current Stage: 5098 - Project deleted
• Completion Date: 19-Sep-2011

Standards Content (Sample)

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 26843
ISO/TC 164/SC 4
Metallic materials — Measurement of
Secretariat: ANSI
fracture toughness of steels at impact
Voting begins on:
loading rates using precracked Charpy
2009-07-01
specimens
Voting terminates on:
2009-09-01
Matériaux métalliques — Mesure de la ténacité à la rupture

d'éprouvettes Charpy préfissurées en acier soumises à des charges
dynamiques


Please see the administrative notes on page iii

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ISO/FDIS 26843:2009(E)
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©
NATIONAL REGULATIONS. ISO 2009

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ISO/FDIS 26843:2009(E)
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ISO/FDIS 26843:2009(E)
In accordance with the provisions of Council Resolution 15/1993, this document is circulated in the
English language only.

© ISO 2009 – All rights reserved iii

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ISO/FDIS 26843:2009(E)
Contents Page
Foreword. v
Introduction . vi
1 Scope. 1
2 Normative references . 1
3 Symbols and definitions. 1
4 Principle . 3
5 Test specimens . 5
6 Testing machines. 6
7 Test procedures and measurements . 7
7.1 General . 7
7.2 Key data . 7
7.3 Impact velocity .
...