ISO 945-1:2019 PDF
Microstructure of cast irons — Part 1: Graphite classification by visual analysis
Microstructure of cast irons — Part 1: Graphite classification by visual analysis
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 32
- Дата публикации:
- 24 июня 2019 г.
- Издание:
- ISO IS 945 edition 3 version 1
- ICS:
- 77.080.10
This document specifies a method of classifying the microstructure of graphite in cast irons by comparative visual analysis. The purpose of this document is to provide information about the method of graphite classification. It is not intended to give information on the suitability of cast-iron types and grades for any particular application. The particular material grades are specified mainly by mechanical properties and, in the case of austenitic and abrasion resistant cast irons, by their chemical composition. The interpretation of graphite form and size does not allow a statistically valid statement on the fulfilment of the requirements specified in the relevant material standard.
Abstract
Overview
ISO 945-1:2019 - Microstructure of cast irons - Part 1: Graphite classification by visual analysis specifies a comparative visual method to classify the graphite microstructure in cast irons. The standard provides a designation system based on graphite form, distribution and size, supported by reference images (magnification ×100). It is intended as an information and classification method for foundry and metallographic practice, not as a stand-alone acceptance criterion for material suitability or mechanical performance.
Key topics and technical requirements
- Designation system
- Form: Graphite is classified into Roman numerals I to VI (reference images provided).
- Distribution: Capital letters A to E indicate distribution - specified for grey cast irons (form I).
- Size: Numeric scale 1 to 8 denotes particle size classes (reference images and limits given).
- Graphite size ranges (form I examples at ×100 magnification):
- Size 1: ≥ 1.0 mm
- Size 2: 0.5 mm to
Технические детали
- Технический комитет
- ISO/TC 25 - Cast irons and pig irons
- SKU
- ISO 945-1:2019
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