ISO 17804:2020
Founding — Ausferritic spheroidal graphite cast irons — Classification
This document defines the grades and the corresponding requirements for ausferritic spheroidal graphite cast irons.
This document specifies five grades of ausferritic spheroidal graphite cast iron by a classification based on mechanical properties determined on machined test pieces prepared from:
— separately cast samples, side-by-side cast or cast-on samples;
— samples cut from a casting.
This document also specifies two grades by a classification as a function of hardness.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Designation
5 Order information
6 Manufacture
7 Requirements
7.1 General
7.2 Test pieces machined from cast samples
7.2.1 General
7.2.2 Impact test
7.3 Test pieces machined from samples cut from a casting
7.4 Hardness
7.5 Graphite structure
7.6 Matrix structure
8 Sampling
8.1 General
8.2 Cast samples
8.2.1 Size of cast samples
8.2.2 Frequency and number of tests
8.2.3 Separately cast samples
8.2.4 Side-by-side cast samples
8.2.5 Cast-on samples
8.2.6 Test pieces machined from cast samples
8.3 Samples cut from a casting
8.4 Formation of test units and number of tests
8.4.1 General
8.4.2 Examples of test units
8.4.3 Number of tests per test unit
9 Test methods
9.1 Tensile test
9.2 Impact test
9.3 Hardness test
9.4 Graphite structure examination
10 Retests
10.1 Need for retesting
10.2 Test validity
10.3 Nonconforming test results
10.4 Heat treatment of samples and castings
11 Additional information
Annex A (normative) Abrasion-resistant grades of ausferritic spheroidal graphite cast iron
Annex B (normative) Minimum elongation values for a test piece with original gauge length Lo = 4 × d
Annex C (informative) Guidance values for Brinell hardness
Annex D (informative) Procedure for the determination of the hardness range
Annex E (informative) Guidance values for tensile strength and elongation after fracture for test pieces machined from samples cut from a casting[4]
Annex F (informative) Unnotched impact test
Annex G (informative) Additional information on mechanical and physical properties
Annex H (informative) Nodularity
Annex I (informative) Sectioning procedure for cast samples
Annex J (informative) Cross-references of similar grades of ausferritic spheroidal graphite cast iron
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Designation
5 Order information
6 Manufacture
7 Requirements
7.1 General
7.2 Test pieces machined from cast samples
7.2.1 General
7.2.2 Impact test
7.3 Test pieces machined from samples cut from a casting
7.4 Hardness
7.5 Graphite structure
7.6 Matrix structure
8 Sampling
8.1 General
8.2 Cast samples
8.2.1 Size of cast samples
8.2.2 Frequency and number of tests
8.2.3 Separately cast samples
8.2.4 Side-by-side cast samples
8.2.5 Cast-on samples
8.2.6 Test pieces machined from cast samples
8.3 Samples cut from a casting
8.4 Formation of test units and number of tests
8.4.1 General
8.4.2 Examples of test units
8.4.3 Number of tests per test unit
9 Test methods
9.1 Tensile test
9.2 Impact test
9.3 Hardness test
9.4 Graphite structure examination
10 Retests
10.1 Need for retesting
10.2 Test validity
10.3 Nonconforming test results
10.4 Heat treatment of samples and castings
11 Additional information
Annex A (normative) Abrasion-resistant grades of ausferritic spheroidal graphite cast iron
Annex B (normative) Minimum elongation values for a test piece with original gauge length Lo = 4 × d
Annex C (informative) Guidance values for Brinell hardness
Annex D (informative) Procedure for the determination of the hardness range
Annex E (informative) Guidance values for tensile strength and elongation after fracture for test pieces machined from samples cut from a casting[4]
Annex F (informative) Unnotched impact test
Annex G (informative) Additional information on mechanical and physical properties
Annex H (informative) Nodularity
Annex I (informative) Sectioning procedure for cast samples
Annex J (informative) Cross-references of similar grades of ausferritic spheroidal graphite cast iron
Bibliography