British Standards Institution

Source:: ISO
Committee:: ISE/101/4 - Toughness testing
Categories:: Metal testing. Mechanical
Number of comments:: 0

Scope

This document specifies a test method for the determination of brittle crack arrest temperature (CAT). It is applicable to ferritic and/or bainitic steel base metals exhibiting ductile to brittle transition behaviour. Applicable materials are rolled steel plates. It is intended for steels with a tensile strength of 950 MPa or less and thickness over 6 mm and not greater than 200 mm. The range of arrest temperatures is between − 196 °C and + 100 °C.

This document also specifies the requirements for test method and test procedures when using the isothermal crack arrest test to judge a valid test result under isothermal conditions and in order to determine the crack arrest temperature.

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Standard timeline

1. Proposal (Complete)

Proposal start date:

2. Draft (Complete)

Draft start date:

29/12/2024

3. Public Comments

Public Comments start date:

06/03/2025

Public Comments end date:

29/04/2025

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Standards Development

BS ISO 20198 Metallic materials — Steel — Method of test for the determination of brittle crack arrest temperature (CAT)

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