ISO 16112:2017 圧縮された（バーミキュラー）グラファイト鋳鉄—分類 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 25, Cast irons and pig irons.

This second edition cancels and replaces the first edition (ISO 16112:2006), which has been technically revised with the following changes:

• Brinell hardness values have been moved from Table 1 and Table 2 to Table A.1;
• property values for cast-on samples with relevant wall thickness t ≤ 12,5 mm have been removed from Table 2 because all data entries for t ≤ 12,5 mm were the same as the values for relevant wall thickness 12,5 mm < t ≤ 30 mm;
• Annex B has been expanded to provide a more comprehensive explanation of the nodularity evaluation technique;
• Annex C has been deleted and replaced because the series production experience gained since the first publication of ISO 16112 in 2006 has surpassed the scope of the annex.

Introduction

This document deals with the classification of compacted (vermicular) graphite cast irons (CGI) in accordance with the mechanical properties of the material.

The properties of compacted (vermicular) graphite cast irons depend on their graphite and matrix microstructure.

The mechanical properties of the material can be evaluated on machined test pieces prepared from

• separately cast samples,
• samples cast in the mould alongside the casting, with a joint running system, hereafter called side-by-side samples, or
• samples cast onto either the casting or the running system, hereafter referred to as cast-on samples, or
• samples cut from a casting (only when an agreement is made between the manufacturer and the purchaser).

The material grade is defined by mechanical properties measured on machined test pieces prepared from separately cast samples, cast-on samples, or samples cut from the casting by agreement between the manufacturer and the purchaser.

Annex A provides typical properties for compacted (vermicular) graphite cast irons obtained in separately cast test bars.

Annex B provides information on a procedure to determine the graphite nodularity of the microstructure.

Annex C provides information on properties and examples for typical applications of compacted (vermicular) graphite cast irons.

Annex D provides cross-references of ISO 16112 grade designations to other national and international standard grades of compacted (vermicular) graphite cast iron.

References used in the preparation of this document are listed in the Bibliography.

1 Scope

This document specifies five grades of compacted (vermicular) graphite cast irons.

This document specifies five grades based on the minimum mechanical properties measured on machined test pieces prepared from

• separately cast samples,
• side-by-side cast samples,
• cast-on samples, or
• samples cut from a casting.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography