ISO 178:2010
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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Plastics — Determination of flexural properties
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06-12-2010
09-04-2025
ISO 178:2010 specifies a method for determining the flexural properties of rigid and semi-rigid plastics under defined conditions. A standard 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.
ISO 178:2010 applies to fibre-reinforced compounds with fibre lengths less than or equal to 7,5 mm prior to processing. For long-fibre-reinforced materials (laminates) with fibre lengths greater than 7,5 mm, see ISO 14125.
The method is not normally suitable for use with rigid cellular materials or sandwich structures containing cellular material. In such cases, ISO 1209‑1 and/or ISO 1209‑2 can be used.
Contrary to the previous editions of this International Standard, this edition specifies two methods, method A and method B. Method A is identical to the method in previous editions of this International Standard, i.e. it uses a strain rate of 1 %/min throughout the test. Method B uses two different strain rates: 1 %/min for the determination of the flexural modulus and 5 %/min or 50 %/min, depending on the ductility of the material, for the determination of the remainder of the flexural stress-strain curve.
| Committee |
ISO/TC 61/SC 2
|
| DevelopmentNote |
DRAFT ISO/FDIS 178 is also available for this standard. (03/2017)
|
| DocumentType |
Standard
|
| Pages |
19
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| SupersededBy | |
| Supersedes |
| Standards | Relationship |
| I.S. EN ISO 178:2010 | Identical |
| BIS IS 13360-5-7 : 2017 | Identical |
| NF EN ISO 178 : 2011 AMD 1 2013 | Identical |
| BS EN ISO 178 : 2010 | Identical |
| NBN EN ISO 178 : 2011 AMD 1 2013 | Identical |
| PN EN ISO 178 : 2011 AMD 1 2013 | Identical |
| EN ISO 178:2010 | Identical |
| NEN EN ISO 178 : 2010 AMD 1 2013 | Identical |
| NF EN ISO 178:2019 | Identical |
| NS EN ISO 178 : 2010 AMD 1 2013 | Identical |
| JIS K 7171:2016 | Identical |
| DIN EN 63:1977-11 | Corresponds |
| DIN EN ISO 178:2013-09 | Identical |
| UNE-EN ISO 178:2011 | Identical |
| DIN 53452:1977-04 | Corresponds |
| BS 2782-3.335A(1993) : AMD 8638 | Identical |
A newer version of this standard is available.
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