BS EN ISO 179-1-2023 PDF

Full title and description

STB BS EN ISO 179-1:2023 — Plastics — Determination of Charpy impact properties — Part 1: Non-instrumented impact test. This publication is the British adoption (BS EN ISO) of ISO 179-1:2023 and specifies the standard Charpy (V‑notch and related) non‑instrumented pendulum impact method for plastics, including specimen types, notching and test conditions for determination of Charpy impact strength.

Abstract

This document specifies a method for determining the Charpy impact strength of plastics under defined conditions. It defines specimen types and configurations, notch types and preferred dimensions, and test parameters that depend on material type, specimen and notch. The method is intended for characterizing brittleness/toughness and for producing comparative data between similar materials when tests are carried out under the specified conditions. This is Part 1 (non‑instrumented impact test).

General information

• Status: Published / current national adoption (BS EN ISO).
• Publication date: June 2023 (BS publication date recorded as 19 June 2023).
• Publisher: British Standards Institution (BSI) as BS EN ISO adoption; original International Standard published by ISO.
• ICS / categories: 83.080.01 — Plastics in general.
• Edition / version: Edition 3 (ISO edition 3, 2023); adopted as BS EN ISO 179-1:2023.
• Number of pages: ISO original: 22 pages; British/EN adoption typically published as a 32‑page BSI document (formatting and national forewords add pages).

Scope

Specifies the non‑instrumented Charpy impact test procedure for plastics: specimen preparation (dimensions, notches), test apparatus (pendulum type), conditioning, test temperatures and procedures to determine the energy absorbed on fracture and to calculate Charpy impact strength. The method is intended for comparative evaluation of toughness and to investigate material behaviour under the defined impact conditions, within the limitations inherent in pendulum impact testing.

Key topics and requirements

• Definition of specimen types and preferred dimensions (including V‑notch and optional notch geometries) for Charpy testing.
• Non‑instrumented pendulum apparatus requirements and verification/operation (pendulum energy selection, supports, striking edge geometry).
• Test conditions: specimen conditioning, test temperatures, and procedures for mounting and releasing the pendulum.
• Calculation and reporting of energy absorbed and Charpy impact strength (energy per cross‑sectional area or per unit thickness as specified).
• Limitations and intended use — comparative ranking and investigation of brittleness/toughness; not intended as a direct design calculation without additional context.
• Relationship to instrumented testing: Part 1 is non‑instrumented; instrumented force‑time/force‑deflection methods are covered in Part 2.

Typical use and users

Used by materials testing laboratories, quality control and production testing teams, R&D departments developing or qualifying polymer formulations, suppliers specifying material properties, and certification/inspection bodies. Typical applications include comparative toughness ranking, batch quality checks, and material specification verification under standard conditions.

Related standards

Relevant and commonly cross‑referenced documents include: ISO 179‑2 (instrumented Charpy impact test / force‑deflection diagrams), ISO 180 (Izod impact strength method), ISO 13802 (verification of pendulum impact‑testing machines), and ASTM equivalents such as ASTM D6110 (Charpy method for plastics) and ASTM D256 (Izod). These standards address instrumented testing, machine verification and alternative impact methods used for plastics.

Keywords

Charpy, impact test, plastics, toughness, brittleness, pendulum, V‑notch, non‑instrumented, test specimen, impact strength, BS EN ISO 179‑1:2023.

FAQ

Q: What is this standard?

A: It is the British adoption (BS EN ISO) of ISO 179‑1:2023 — the international standard that specifies the Charpy non‑instrumented pendulum impact test method for plastics.

Q: What does it cover?

A: The standard covers specimen types and dimensions, notching, apparatus and pendulum requirements, test temperatures and procedures, calculation and reporting of absorbed energy and impact strength for Charpy tests performed without instrumentation (Part 1). It is intended for comparative and investigative testing of plastics.

Q: Who typically uses it?

A: Materials testing laboratories, QA/QC teams, polymer manufacturers and compounders, product R&D, and certification bodies that need standardized Charpy impact data for plastics.

Q: Is it current or superseded?

A: ISO 179‑1:2023 is the current ISO edition (published June 2023) and replaces the 2010 edition; the BS EN ISO adoption was published in mid‑2023. Users should check national catalogues or BSI for any subsequent amendments or revisions.

Q: Is it part of a series?

A: Yes — ISO 179 is a multi‑part series. Part 1 covers the non‑instrumented Charpy test; Part 2 covers the instrumented Charpy test (force‑deflection/force‑time measurements). Related standards (ISO 180, ISO 13802) cover Izod testing and machine verification.

Q: What are the key keywords?

A: Charpy, impact, V‑notch, pendulum, plastics, toughness, brittleness, non‑instrumented, impact strength, specimen dimensions, BS EN ISO 179‑1:2023.