DIN 53435 2024-10 PDF

Full title and description

DIN 53435:2024-10 — Prüfung von Kunststoffen — Biegeversuch und Schlagbiegeversuch an Dynstat‑Probekörpern / Testing of plastics — Bending test and impact test on Dynstat test specimens. The standard specifies the specimen geometry, the Dynstat apparatus configuration and two test methods: a dynamic impact (Dynstat) bending test and a (quasi‑)static four‑point bending test used for comparative determination of toughness, brittleness, flexural strength and related properties of plastics.

Abstract

This document defines procedures for conducting Dynstat impact bending tests (including notched and unnotched variants) and for quasi‑static four‑point bending on small Dynstat specimens. It covers required specimen dimensions, conditioning, test temperatures, permitted notch types (including the inclusion of the Charpy/Izod notch type A for comparability), apparatus characteristics and basic calibration/performance checks. The methods are intended for material comparison and quality control within the limits of the prescribed test conditions.

General information

• Status: Current (latest edition as of 2024).
• Publication date: October 2024 (2024‑10).
• Publisher: Deutsches Institut für Normung (DIN).
• ICS / categories: 83.080.01 (Plastics in general).
• Edition / version: Edition 2024 (revises the 2018 edition).
• Number of pages: 32 pages.

Scope

Specifies two bending tests for Dynstat‑type specimens: a dynamic impact bending (Dynstat) test for assessing impact‑related toughness or brittleness under defined impact conditions, and a (quasi‑)static four‑point bending test to determine flexural strength and behaviour under slow loading. The standard defines specimen dimensions, permitted notch geometries, temperature and conditioning requirements, apparatus configuration and basic calibration/performance checks required for comparable results. It is intended for quality control, material comparison and acceptance testing rather than to predict full‑scale component behaviour.

Key topics and requirements

• Definition and dimensions of Dynstat test specimens and recommended conditioning prior to testing.
• Dynamic impact bending (Dynstat) procedure: pendulum/hammer configuration, specimen support, energy measurement and reporting of unnotched and notched impact strength.
• (Quasi‑)static four‑point bending procedure: span, loading arrangement, measurement of flexural stress/strain and reporting conventions.
• Permitted notch types and comparison guidance (includes U‑shaped Dynstat notch and option to use Charpy/Izod notch type A for comparability).
• Apparatus characteristics, calibration and performance checks (alignment with pendulum/impact device standards and device requirements).
• Reporting requirements and cautions for comparing results (dimensions, conditioning and test conditions must match).

Typical use and users

Used by materials laboratories, plastics manufacturers, quality control departments, test houses and suppliers in industries such as automotive, electrical/electronic, consumer goods and plastics processing. Common applications include production control, material comparison, verification of modification or formulation effects, and acceptance testing of moulding materials and small molded items. Accredited test labs commonly list DIN 53435 among their available test methods.

Related standards

Harmonises or is used alongside Charpy and Izod impact standards (ISO 179‑1 / Charpy, ISO 180 / Izod), ISO 13802 (pendulum impact tester characteristics/calibration), and the device‑related DIN 51230 (Dynstat apparatus). Other DIN standards on plastics impact and burning behaviour (e.g., DIN 53438 series, DIN 53449) are related for complementary testing purposes. The 2024 edition consolidates and updates earlier editions (including the 2018 and pre‑2018 revisions).

Keywords

Dynstat, Dynstat test specimen, bending test, impact bending, flexural strength, impact strength, plastics testing, four‑point bending, notched impact, Charpy notch, Izod notch, toughness, brittleness.

FAQ

Q: What is this standard?

A: DIN 53435:2024 is a DIN standard that specifies procedures for Dynstat dynamic impact bending and (quasi‑)static four‑point bending tests on standardized small Dynstat specimens used to characterise the impact and flexural behaviour of plastics.

Q: What does it cover?

A: It covers specimen geometry and preparation, test apparatus characteristics, dynamic (impact) and quasi‑static bending test procedures, notch options (notched and unnotched tests), conditioning and reporting conventions, and basic calibration/performance checks to ensure comparable results.

Q: Who typically uses it?

A: Materials test laboratories, plastics manufacturers, product development teams, quality assurance and automotive/plastics suppliers use the standard for production control, material comparison, and acceptance testing. Accredited testing laboratories commonly list it among their service offerings.

Q: Is it current or superseded?

A: Current — the 2024 edition (published October 2024) is the latest edition and replaces earlier editions (including the 2018 edition).

Q: Is it part of a series?

A: It belongs to the family of DIN standards on plastics testing (DIN 534xx series) and is used in conjunction with international impact and bending standards such as ISO 179‑1 and ISO 180 and with device standards such as ISO 13802 and DIN 51230.

Q: What are the key keywords?

A: Key keywords are Dynstat, impact bending, bending test, flexural strength, notched impact, Charpy/Izod comparability, plastics testing, toughness and specimen conditioning.