ISO 945-4:2019 PDF

Microstructure of cast irons — Part 4: Test method for evaluating nodularity in spheroidal graphite cast irons

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Title (English):

ISO 945-4:2019

Microstructure of cast irons — Part 4: Test method for evaluating nodularity in spheroidal graphite cast irons

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 30
Publication date:: May 3, 2019
Edition:: ISO IS 945 edition 1 version 1
ICS:: 77.080.10

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Description (English):

This document specifies a test method for evaluating nodularity in spheroidal graphite cast irons by comparative visual analysis and image analysis techniques. This document provides figures for different levels of nodularity and graphite particle count of spheroidal graphite cast irons for visual analysis.

Technical details

Technical committee: ISO/TC 25 - Cast irons and pig irons
SKU: ISO 945-4:2019

Abstract

Overview

ISO 945-4:2019 - "Microstructure of cast irons - Part 4: Test method for evaluating nodularity in spheroidal graphite cast irons" - defines standardized procedures to assess nodularity of spheroidal graphite cast iron using comparative visual analysis and image analysis. The document supplies reference images for different nodularity levels and graphite particle counts and gives rules for sampling, preparation, measurement and reporting of results.

Key topics and technical requirements

Scope: Test method for evaluating nodularity and graphite particle count in spheroidal graphite cast irons by visual and image analysis.
Definitions: Important terms include maximum Féret diameter, roundness (area-based ratio using maximum Féet), spheroidal graphite (roundness ≥ 0.6), nodularity (percentage of spheroidal graphite), and graphite particle count.
Sampling & preparation: Follow metallographic sampling and polishing per ISO 945-1 and ISO/TR 945-2 to ensure contrast and unaltered microstructure.
Examination magnification: ×100 preferred; adjust to match reference images in the standard.
Visual analysis: Direct microscope observation, projection on ground glass or screen using reference images (Annex A and B). Use calibrated eyepieces where appropriate.
Image analysis: Digital capture and processing per ISO/TR 945-2. Particles with maximum Féret diameter

Related standards

Mentioned in the description and other ISO standards

Overview

Key topics and technical requirements

Scope: Test method for evaluating nodularity and graphite particle count in spheroidal graphite cast irons by visual and image analysis.
Definitions: Important terms include maximum Féret diameter, roundness (area-based ratio using maximum Féet), spheroidal graphite (roundness ≥ 0.6), nodularity (percentage of spheroidal graphite), and graphite particle count.
Sampling & preparation: Follow metallographic sampling and polishing per ISO 945-1 and ISO/TR 945-2 to ensure contrast and unaltered microstructure.
Examination magnification: ×100 preferred; adjust to match reference images in the standard.
Visual analysis: Direct microscope observation, projection on ground glass or screen using reference images (Annex A and B). Use calibrated eyepieces where appropriate.
Image analysis: Digital capture and processing per ISO/TR 945-2. Particles with maximum Féret diameter

ISO 945-4:2019 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

Related standards

Microstructure of cast irons - Part 1: Graphite classification by visual analysis (ISO 945-1:2019)

Microstructure of cast irons — Part 2: Graphite classification by image analysis

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