AS 1444-1996

1 - AS 1444-1996 WROUGHT ALLOY STEELS - STANDARD, HARDENABILITY (H) SERIES AND HARDENED AND TEMPERED TO DESIGNATED MECHANICAL PRO
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 REFERENCED DOCUMENTS
7 - 1.3 DEFINITIONS
7 - 1.3.1 Bars
7 - 1.3.2 Batch
7 - 1.3.3 Billet
8 - 1.3.4 Bloom
8 - 1.3.5 Limiting ruling section
8 - 1.3.6 Out-of-hexagon
8 - 1.3.7 Out-of-round
8 - 1.3.8 Out-of-square
8 - 1.3.9 Primary rolled product
8 - 1.3.10 Rod
8 - 1.3.11 Slab
8 - 1.3.12 Test piece
8 - 1.3.13 Test sample
8 - 1.3.14 Test specimen
8 - 1.4 DESIGNATION
8 - 1.4.1 General
9 - 1.4.2 Series designation
9 - 1.4.3 Modification symbols
9 - 1.4.4 Designations for tensile strength ranges of hardened and tempered material
10 - 1.4.5 Surface condition
10 - 1.4.6 Austenitic grain size
10 - 1.5 CONDITION OF STEEL ON DELIVERY
10 - 1.6 MATERIALS
10 - 1.6.1 Chemical composition
11 - 1.6.2 Hardness requirements
11 - 1.6.3 Tensile test requirements
11 - 1.6.4 Hardenability test requirements
11 - 1.6.5 Austenitic grain size requirements
12 - 1.7 FREEDOM FROM DEFECTS
12 - 1.7.1 General
12 - 1.7.2 Hot-rolled bars
12 - 1.7.3 Cold-finished bars
12 - 1.8 SURFACE DRESSING
12 - 1.8.1 Hot-rolled bars
12 - 1.8.2 Blooms, billets and slabs
13 - 1.9 ROUNDING OF TEST RESULT VALUES
13 - 1.9.1 General
13 - 1.9.2 Tensile test results
13 - 1.10 MARKING
14 - SECTION 2 STEELS SUPPLIED TO CHEMICAL COMPOSITION ONLY
14 - 2.1 SCOPE
14 - 2.2 CHEMICAL COMPOSITION
16 - SECTION 3 STEELS SUPPLIED TO CHEMICAL COMPOSITION AND HARDENABILITY REQUIREMENTS
16 - 3.1 SCOPE
16 - 3.2 CHEMICAL COMPOSITION
16 - 3.3 HARDENABILITY TEST
16 - 3.3.1 General
16 - 3.3.2 Specification of hardenability limits
17 - 3.4 HARDENABILITY REQUIREMENTS
17 - 3.4.1 General
19 - 3.4.2 Grade AS 1444/ X1320H
19 - 3.4.3 Grade AS 1444/ X3312H
20 - 3.4.4 Grade AS 1444/ 4130H
20 - 3.4.5 Grade AS 1444/ 4140H
21 - 3.4.6 Grade AS 1444/ 4150H
21 - 3.4.7 Grade AS 1444/ X4317H
22 - 3.4.8 Grade AS 1444/ 4340H
22 - 3.4.9 Grade AS 1444/ 4620H
23 - 3.4.10 Grade AS 1444/5120H
23 - 3.4.11 Grade AS 1444/5132H
24 - 3.4.12 Grade AS 1444/5145H
24 - 3.4.13 Grade AS 1444/6150H
25 - 3.4.14 Grade AS 1444/8115H
25 - 3.4.15 Grade AS 1444/8617H
26 - 3.4.16 Grade AS 1444/8620H
26 - 3.4.17 Grade AS 1444/86B30H
27 - 3.4.18 Grade AS 1444/8660H
27 - 3.4.19 Grade AS 1444/8740H
28 - 3.4.20 Grade AS 1444/9260H
28 - 3.4.21 Grade AS 1444/9261H
29 - 3.4.22 Grade AS 1444/X9315H
30 - SECTION 4 STEELS SUPPLIED TO CHEMICAL COMPOSITION AND MECHANICAL PROPERTY REQUIREMENTS
30 - 4.1 SCOPE
30 - 4.2 CHEMICAL COMPOSITION
30 - 4.3 HEAT TREATMENT
30 - 4.3.1 Hardening and tempering
30 - 4.3.2 Nitriding
30 - 4.4 MECHANICAL PROPERTIES
30 - 4.5 METHODS FOR MECHANICAL TESTING
30 - 4.5.1 Form of test sample
31 - 4.5.2 Preparation of test specimens
31 - 4.5.3 Preparation of test pieces
32 - 4.5.4 Tensile test
32 - 4.5.5 Hardness test
32 - 4.5.6 Impact test
36 - SECTION 5 MANUFACTURING TOLERANCES
36 - 5.1 SCOPE
36 - 5.2 DIMENSIONAL TOLERANCES FOR HOT-ROLLED BARS
36 - 5.3 DIMENSIONAL TOLERANCES FOR COLD-FINISHED BARS
41 - APPENDIX A - PURCHASING GUIDELINES
41 - A1 GENERAL
41 - A2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
43 - APPENDIX B - MEANS FOR DEMONSTRATING COMPLIANCE WITH THIS STANDARD
43 - B1 SCOPE
43 - B2 STATISTICAL SAMPLING
43 - B3 PRODUCT CERTIFICATION
43 - B4 SUPPLIER’S QUALITY SYSTEM
44 - B5 OTHER MEANS OF ASSESSMENT
44 - B5.1 General
44 - B5.2 Sampling
45 - APPENDIX C - GUIDE TO THE SELECTION OF STEELS BASED ON HEAT TREATMENT, MECHANICAL PROPERTIES AND RULING SECTION
45 - C1 SCOPE
45 - C2 RULING SECTION
47 - APPENDIX D - REQUIREMENTS FOR MAXIMUM SURFACE IMPERFECTION DEPTH
49 - APPENDIX E - RECOMMENDED MINIMUM MACHINING ALLOWANCES

Specifies requirements for wrought alloy steels intended for general engineering purposes and is applicable to hot-rolled and cold-finished bars for machining, blooms, billets and slabs for forgings, and forgings. The steel is either supplied to chemical composition only, to chemical composition and end-quench hardenability (H) requirements or to chemical composition and mechanical properties achieved by hardening and tempering. It also specifies dimensional tolerances and requirements for maximum surface imperfection depth.

This Standard specifies requirements for wrought alloy steels intended for general engineering purposes and is applicable to hot-rolled or cold-finished bars for machining, blooms, billets and slabs for forgings, and forgings, as follows:(a) To specified chemical composition only (standard steel series).(b) To specified chemical composition and end-quench hardenability requirements (H series).(c) To specified chemical composition and mechanical properties achieved by hardening and tempering.This Standard does not apply to stainless steels.NOTES:1 Advice and recommendations on information to be supplied by the purchaser at the time of enquiry or order are contained in Appendix A.2 Alternative means for determining compliance with this Standard are given in Appendix B.

First published as AS G18-1966.
AS G19 first published 1966.
AS G20 first published 1966.
AS G19-1966 and AS G20-1966 revised, amalgmated and redesignated AS 1444-1974.
Second edition 1981.
AS G18-1966 revised and redesignated AS 2506-1981.
Third edition AS 1444-1986.
Second edition AS 2506-1990.
AS 1444-1986 and AS 2506-1990 revised, amalgamated and designated AS 1444-1996.