AS 1733-1976

1 - AS 1733-1976 METHODS FOR THE DETERMINATION OF GRAIN SIZE IN METALS
4 - PREFACE
4 - CONTENTS
5 - SECTION 1. SCOPE AND APPLICATION
5 - 1.1 SCOPE.
5 - 1.2 APPLICATION.
5 - SECTION 2. GENERAL PROCEDURES FOR METHODS OF GRAIN SIZE DETERMINATION
5 - 2.1 SCOPE OF SECTION.
5 - 2.2 GRAIN SIZE NUMBER.
5 - 2.3 ESTIMATION OF GRAIN SIZE.
5 - 2.3.1 General.
5 - 2.3.2 Accuracy of Equipment.
5 - 2.4 COMPARISON METHOD.
5 - 2.4.1 Method.
5 - 2.4.2 Alternative Magnification.
6 - 2.5 PLANIMETRIC METHOD.
6 - 2.6 INTERCEPT METHOD.
9 - SECTION 3. DETERMINATION OF AUSTENITE GRAIN SIZE IN STEELS
9 - 3.1 SCOPE OF SECTION.
9 - 3.2 MICROGRAPHIC METHODS.
9 - 3.2.1 Selection of Method.
9 - 3.2.2 McQuaid-Ehn (Carburization) Method.
9 - 3.2.3 Pro-eutectoid Ferrite Method.
9 - 3.2.4 Martensitic Method.
9 - 3.2.5 Gradient Quench Method.
10 - 3.2.6 Pro-eutectoid Cementite Method.
10 - 3.2.7 Oxidation Method.
10 - 3.2.8 Determination of Austenite Grain Size in Austenitic Stainless Steels.
10 - 3.3 TEST REPORT.
11 - SECTION 4. DETERMINATION OF GRAIN SIZE IN METALS AND ALLOYS
11 - 4.1 SCOPE OF SECTION.
11 - 4.2 LIMITATIONS ON PROCEDURES.
11 - 4.3 MICROGRAPHIC METHODS.
11 - 4.4 TEST REPORT.
12 - APPENDIX A - EXPLANATORY NOTES ON SPECIFYING AUSTENITEGRAIN SIZE LIMITS FOR STEEL
12 - APPENDIX B - ETCHING REAGENTS
12 - B1 GENERAL.
12 - B2 ETCHANTS FOR OUTLINING PRIOR AUSTENITE GRAINS IN STEEL.
12 - B3 ETCHANTS FOR GENERAL STRUCTURE IN ALUMINIUM AND ITS ALLOYS.
12 - B4 ETCHANTS FOR GENERAL STRUCTURE IN COPPER AND ITS ALLOYS.
12 - B5 ETCHANTS FOR LEAD BASE.
12 - B6 ETCHANTS FOR MOLYBDENUM BASE.
12 - B7 ETCHANT FOR PURE NICKEL AND HIGH NICKEL ALLOYS.
13 - APPENDIX C - STANDARD GRAIN SIZE CHARTS

In separate sections covers general procedures for determining grain size in metals and alloys by estimation of grain size using the comparison method and by calculation of grain size number using the intercept and planimetric methods, specific procedures for austenitic grain size in steels by a range of micrographic methods, and specific procedures for metals and alloys consisting principally of a single phase. Appendices provide explanatory notes on specifying austenitic grain size limits for steel, list etching reagents, and show the standard grain size charts for untwinned grains (flat etch), twinned grain (flat etch), and heavily twinned grains (contrast etch).

This standard describes methods for the determination of the grain size in metals and alloys.

First published (as AS G13) 1968.
Revised and issued as AS 1733 1976