BS EN ISO 178:2019 Plastics. Determination of flexural properties

BS EN ISO 178:2019

Plastics. Determination of flexural properties

Status : Current   Published : May 2019



What is this standard about?

This document specifies a method for determining the flexural properties of rigid and semi-rigid plastics under defined conditions. A preferred test specimen is defined, but parameters are included for alternative specimen sizes for use where appropriate. A range of test speeds is included.

The method is used to investigate the flexural behaviour of the test specimens and to determine the flexural strength, flexural modulus and other aspects of the flexural stress/strain relationship under the conditions defined. It applies to a freely supported beam, loaded at midspan (three-point loading test).

The method is suitable for use with the following range of materials:

— thermoplastic moulding, extrusion and casting materials, including filled and reinforced compounds in addition to unfilled types; rigid thermoplastics sheets;

— thermosetting moulding materials, including filled and reinforced compounds; thermosetting sheets.

The method is performed using specimens which can be either moulded to the specified dimensions, machined from the central section of a standard multipurpose test specimen (see ISO 20753) or machined from finished or semi-finished products, such as mouldings, laminates, or extruded or cast sheet.

The method specifies the preferred dimensions for the test specimen. Tests which are carried out on specimens of different dimensions, or on specimens which are prepared under different conditions, can produce results which are not comparable. Other factors, such as the test speed and the conditioning of the specimens, can also influence the results.

Standard NumberBS EN ISO 178:2019
TitlePlastics. Determination of flexural properties
Publication Date16 May 2019
Normative References(Required to achieve compliance to this standard)ISO 9513, ISO 294-1:2017, ISO 293, ISO 291, ISO 16012, ISO 7500-1, ISO 2602, ISO 2818, ISO 295, ISO 20753, ISO 10724-1
Informative References(Provided for Information)ASTM E691, ISO 1209-2, ISO 10350-2, ISO 1209-1, ISO 5725-1, ISO 10350-1, ISO 527-2, ISO 14125, ISO 472
ReplacesBS EN ISO 178:2010+A1:2013
International RelationshipsEN ISO 178:2019,ISO 178:2019
Draft Superseded By17/30335677 DC
DescriptorsThermoplastic polymers, Test specimens, Modulus of elasticity, Plastics and rubber technology, Bend testing, Plastics, Elasticity, Strength of materials, Testing conditions, Bending stress, Thermosetting polymers, Reinforced materials, Specimen preparation, Flexural strength
Title in FrenchPlastiques. Détermination des propriétés en flexion
Title in GermanKunststoffe. Bestimmung der Biegeeigenschaften
ISBN978 0 580 92959 5
File Size1.117 MB

 Your basket
Your basket is empty

Multi-user access to over 3,500 medical device standards, regulations, expert commentaries and other documents

Develop a PAS

Develop a fast-track standardization document in 9-12 months

Worldwide Standards
We can source any standard from anywhere in the world

Tracked Changes

Understand the changes made to a standard with our new Tracked Changes version

Customers who bought this product also bought