EN ISO 527-1

	DIN EN ISO 527-1
Area	Plastics
title	Determination of tensile properties - Part 1: General principles
Brief description:	General principles for determining tensile strength
Latest edition	1996-04
ISO	527-1

The EN ISO 527-1 (last issue in April 1996, current ISO version February 2012) is a European standard for plastics for the determination of tensile properties, which by a tensile test with a tensile testing machine are determined. EN ISO 527-1 replaces the following earlier DIN standards : DIN 53371, DIN 53455 and DIN 53457.

object

The standard describes the test conditions, the geometry of the test specimen , the recording of measured values, the test speed and the evaluation. The result of the test is a stress-strain diagram from which the following parameters can be determined:

• (Tensile) modulus (modulus of elasticity in tension) ${\displaystyle E_{\rm {t}}}$
• Yield stress ${\displaystyle \sigma _{\rm {Y}}}$
• Yield strain ${\displaystyle \epsilon _{\rm {Y}}}$
• Breakdown voltage (tensile stress at break) ${\displaystyle \sigma _{\rm {B}}}$
• Elongation at break (tensile strain at break) ${\displaystyle \epsilon _{\rm {B}}}$
• Tensile strength (tensile stress) ${\displaystyle \sigma _{\rm {M}}}$
• Poisson (Poisson's ratio) ${\displaystyle \mu }$

criticism

The characteristic values ​​of the tensile test according to EN ISO 527-1 only roughly describe the strength properties of plastics. Defined test conditions ensure that the values ​​determined on different samples or materials can be compared, but these do not have to be identical to the loads that occur in practice on a component. In particular, many plastics behave viscoelastically , which makes additional characterization methods necessary.

See also

• CAMPUS

Web links

• ISO (International Organization for Standardization) (English)