# The Pressure Equipment (Safety) Regulations 2016, Paragraph 41: Material characteristics


Unless other values are required in accordance with other criteria that must be taken into account, a steel is considered as sufficiently ductile to satisfy paragraph 31(3)(a) if, in a tensile test carried out by a standard procedure, its elongation after rupture is no less than 14% and its bending rupture energy measured on an ISO V test-piece is no less than 27 J, at a temperature not greater than 20oC but not higher than the lowest scheduled operating temperature.

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Source: https://www.legislation.gov.uk/uksi/2016/1105/schedule/2/paragraph/41 (the official version)
Page: https://openlegislation.uk/pressure-equipment-safety-regulations-2016/schedule-2/paragraph-41
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.