ISO 945-4 is a safety standard on the microstructure of cast irons.
ISO 945-4 specifies a test method for evaluating nodularity in spheroidal graphite cast irons by comparative visual analysis and image analysis techniques.
ISO 945-4 provides figures for different levels of nodularity and graphite particle count of spheroidal graphite cast irons for visual analysis.
ISO 945-4 on the test method for evaluating nodularity in spheroidal is relevant to:
The shape of the graphite particles is an important characteristic of spheroidal graphite cast irons.
ISO 945-4 characterizes the graphite particles observed, information is generally necessary on the nodularity, the size, and the number of the graphite particles. Nodularity is designated by a percentage, in increments of five percentage points. Graphite particle size is designated by numbers from 3 to 8.
Overall, ISO 945-4 is useful as it assists the user with the test method for evaluating nodularity in spheroidal.
BSI recommends this version of standard for organisations operating in or with the UK. The ISO edition is available here if required.