ISO 148-2-2016 PDF

Full title and description

ISO 148-2:2016 — Metallic materials — Charpy pendulum impact test — Part 2: Verification of testing machines. This part of ISO 148 specifies requirements and methods for verification of pendulum-type Charpy impact testing machines (constructional elements, performance and accuracy), and describes direct and indirect verification methods for industrial machines used with 2 mm or 8 mm strikers.

Abstract

Provides procedures to verify that a Charpy pendulum impact testing machine meets constructional and performance requirements and produces accurate absorbed-energy results. Verification is described by a static (direct) method — measurement and calibration of machine components — and a dynamic (indirect) method — use of reference test pieces to check points on the absorbed-energy scale. The standard explains contribution of machine internal energy losses to measured absorbed energy and specifies when a machine is considered compliant.

General information

• Status: Published (active International Standard).
• Publication date: October 2016.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 77.040.10 (Metallurgical testing; impact testing).
• Edition / version: Edition 3 (ISO 148-2:2016).
• Number of pages: 38 pages.

(General information above derived from the ISO catalogue entry for ISO 148-2:2016.)

Scope

This part of ISO 148 applies to pendulum impact testing machines of various capacities and designs used for Charpy tests where 2 mm or 8 mm strikers are employed (for example in conjunction with ISO 148-1). It covers verification of machine components, full-machine performance checks and criteria for compliance; reference-machine verification specifications are addressed in ISO 148-3. The standard is intended for industrial machines and identifies more stringent requirements for reference machines.

Key topics and requirements

• Direct verification: dimensional and constructional checks, alignment, striker geometry, anvil gap and bearing play, friction and other measurable machine parameters.
• Indirect verification: dynamic checks using calibrated reference test pieces to verify points on the absorbed-energy scale.
• Assessment and accounting for internal energy losses (air resistance, bearing friction, pointer friction) and their effect on measured absorbed energy.
• Classification of machines as industrial or reference, with reference-machine verification specified elsewhere (ISO 148-3).
• Requirements for verification frequency, calibration traceability, verification reports and estimation of measurement uncertainty for indirect verification.

Typical use and users

Used by materials testing laboratories, quality and R&D departments in metallurgy and manufacturing, calibration and conformity-assessment bodies, machine manufacturers and standards committees to verify and commission Charpy impact machines or to check ongoing performance and traceability of results.

Related standards

Closely related to ISO 148-1 (Charpy impact test — test method) and ISO 148-3 (specification and verification of reference machines / reference test pieces). Regional/adopted versions exist (for example EN/DIN adoptions of ISO 148-2:2016).

Keywords

Charpy, pendulum, impact test, verification, calibration, reference test piece, absorbed energy, testing machine, metallic materials, ISO 148.

FAQ

Q: What is this standard?

A: ISO 148-2:2016 is Part 2 of the ISO 148 series that specifies how to verify pendulum-type Charpy impact testing machines, covering both direct (static) and indirect (dynamic) verification methods.

Q: What does it cover?

A: It covers constructional checks, machine performance and accuracy, accounting for internal energy losses, procedures for using reference test pieces, verification frequency, calibration traceability and reporting requirements for Charpy pendulum machines used with 2 mm or 8 mm strikers.

Q: Who typically uses it?

A: Materials testing and calibration laboratories, manufacturers of impact testing machines, quality assurance teams in metalworking industries, and accreditation/standards bodies use this standard to confirm machine performance and result traceability.

Q: Is it current or superseded?

A: ISO 148-2:2016 is the published edition (third edition, published October 2016) and supersedes earlier editions (for example the 2008 and 1998 editions). Users should check national/regional adoption for amendments or later revisions.

Q: Is it part of a series?

A: Yes — it is Part 2 of the ISO 148 series on Charpy pendulum impact testing. Other parts include ISO 148-1 (test method) and ISO 148-3 (reference machines and reference test pieces).

Q: What are the key keywords?

A: Charpy, pendulum, impact, verification, calibration, reference test piece, absorbed energy, metallic materials, testing machine.