ISO 148-1-2016 PDF

Full title and description

ISO 148-1:2016 — Metallic materials — Charpy pendulum impact test — Part 1: Test method. This International Standard specifies the conventional Charpy pendulum impact test (V‑notch and U‑notch) used to determine the energy absorbed during fracture of metallic specimens under impact loading.

Abstract

ISO 148-1:2016 defines the Charpy pendulum impact test procedure for V‑notch and U‑notch specimens, covering specimen dimensions and tolerances, test-piece handling and conditioning, test-machine setup and operation, and reporting of absorbed energy. It does not cover instrumented impact testing (see ISO 14556). Annexes B and C of the standard reproduce material based on ASTM E23 by permission.

General information

• Status: Published (International Standard; under review/to be revised — stage 90.92).
• Publication date: October 2016 (Edition 3, 2016‑10).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 77.040.10 — Mechanical testing of metals.
• Edition / version: Edition 3 (2016).
• Number of pages: 29 pages.

Core bibliographic details above are based on ISO bibliographic records and official product metadata.

Scope

ISO 148-1:2016 applies to the Charpy pendulum impact test used to determine the energy absorbed by metallic test pieces having a V‑notch or a U‑notch. The standard specifies standard and sub‑size specimen dimensions (normal specimen 55 × 10 × 10 mm with permitted reduced thicknesses), permissible tolerances, notch geometry, specimen conditioning (including temperature control and transfer limits), test‑machine requirements for routine testing, test procedure (positioning, striker contact, support span) and the format for reporting results. Instrumented Charpy testing and detailed instrumented-data analysis are excluded and handled by a separate ISO document.

Key topics and requirements

• Specimen geometry and tolerances: standard Charpy dimensions (55 mm length, 10 × 10 mm section) and allowed sub‑size sections (7.5, 5, 2.5 mm), V‑notch (45°) and U‑notch forms with specified root radii and ligament dimensions.
• Specimen surface finish, notch machining tolerances and centring requirements for reproducible results.
• Temperature conditioning and handling: conditioning procedures and maximum allowed time between removal from conditioning and impact to preserve test temperature.
• Pendulum impact‑tester operation: striker/contact geometry, support span, machine lock‑up, energy measurement (absorbed energy from pendulum swing) and basic verification practices for routine machines.
• Reporting requirements: absorbed energy, lateral expansion (when required), specimen dimensions and notch details, test temperature, machine type and any deviations from the standard method.
• Exclusions and references: instrumented impact testing is excluded (see ISO 14556); machine verification and calibration are covered in the companion parts ISO 148‑2 and ISO 148‑3.

Typical use and users

ISO 148-1:2016 is used by materials testing laboratories, quality control departments in metal‑production and fabrication industries, R&D groups studying material toughness and fracture behaviour, inspection bodies, certification organisations and standards committees. Typical applications include qualification of steels and other metals for notch‑toughness, routine incoming‑material checks, weld procedure qualification, and research into temperature‑dependent impact behaviour.

Related standards

Directly related documents include:

- ISO 148-2 (verification of pendulum impact testing machines) and ISO 148-3 (verification of reference machines) for machine calibration and accuracy;

- ISO 14556 (instrumented Charpy test method) for instrumented/dynamic data collection and analysis;

- ASTM E23 (Charpy pendulum impact test) which is referenced in informative annexes; and regional/adopted equivalents such as EN ISO 148-1.

Keywords

Charpy, Charpy V‑notch, Charpy U‑notch, pendulum impact test, impact energy, notch toughness, metallic materials, specimen dimensions, test method, ISO 148-1.

FAQ

Q: What is this standard?

A: ISO 148-1:2016 is the international standard that specifies the conventional Charpy pendulum impact test procedure (V‑ and U‑notch) for measuring absorbed impact energy of metallic materials.

Q: What does it cover?

A: It covers specimen dimensions and tolerances, notch geometry, specimen conditioning and temperature control, machine operation for routine testing, test execution, measurement of absorbed energy and reporting of results. It does not cover instrumented Charpy testing (see ISO 14556).

Q: Who typically uses it?

A: Accredited testing laboratories, industrial quality/inspection teams, materials engineers, researchers, manufacturers of testing equipment and organisations performing material qualification, weld testing and failure analysis.

Q: Is it current or superseded?

A: The 2016 edition (Edition 3) is the current published edition (October 2016). ISO’s lifecycle records show the document is under periodic review and listed with a review stage (to be revised, stage 90.92), so users should confirm the current status with their national standards body before purchase or normative citation.

Q: Is it part of a series?

A: Yes — ISO 148 is a multipart series addressing Charpy pendulum impact testing. Part 1 is the test method (this document), Part 2 covers verification of testing machines, Part 3 covers verification of reference machines, and related ISO documents (for example ISO 14556) cover instrumented testing.

Q: What are the key keywords?

A: Charpy, pendulum, impact test, V‑notch, U‑notch, absorbed energy, notch toughness, specimen dimensions, metallic materials, ISO 148-1.