1 - AS 1663-1974 DROPWEIGHT TEST FOR NIL-DUCTILITY TRANSITION TEMPERATURE OF FERRITIC STEELS (METRIC UNITS)
4 - PREFACE
5 - CONTENTS
6 - SECTION 1. SCOPE AND DEFINITIONS
6 - 1.1 SCOPE.
6 - 1.2 DEFINITIONS.
6 - 1.2.1 Sample
6 - 1.2.2 Test Specimen
6 - 1.2.3 Test Piece
6 - 1.2.4 Nil-ductility Transition Temperature (NDTT)
6 - 1.2.5 Dropweight Machine
7 - 1.2.6 Crack-starter
7 - 1.2.7 Brittle Weld Crack-starter
7 - 1.2.8 Cold Pressed and Aged Crack-starter
8 - SECTION 2. TEST SPECIMENS AND TEST PIECES
8 - 2.1 TEST SPECIMENS.
8 - 2.1.1 Identification and Marking.
8 - 2.1.2 Size of Test Specimens.
8 - 2.1.3 Location of Test Pieces.
8 - 2.1.4 Condition of Test Material.
9 - 2.2 TEST PIECES.
9 - 2.2.1 Dimensions.
9 - 2.2.2 Cutting.
9 - 2.2.3 Identification.
10 - SECTION 3. PREPARATION OF CRACK-STARTER
10 - 3.1 SELECTION OF CRACK-STARTER.
10 - 3.2 PREPARATION OF BRITTLE WELD CRACK-STARTER.
10 - 3.2.1 Weld Bead Location.
10 - 3.2.2 Welding.
11 - 3.2.3 Notching.
11 - 3.2.4 Alternative Brittle Weld Crack-starters.
11 - 3.3 PREPARATION OF COLD PRESSED AND AGED CRACK-STARTER.
11 - 3.3.1 Test Piece Preparation.
12 - 3.3.2 Ageing.
14 - SECTION 4. TESTING MACHINE
14 - 4.1 GENERAL ARRANGEMENT.
14 - 4.2 DROPWEIGHT.
14 - 4.3 ANVILS.
14 - 4.4 GUIDES.
14 - 4.5 RELEASE.
14 - 4.6 BASE.
14 - 4.7 SAFETY DEVICES.
19 - SECTION 5. TEST PROCEDURE
19 - 5.1 CONDITIONING OF TEST PIECE.
19 - 5.2 ACCURACY OF TEMPERATURE OF BATH.
19 - 5.3 TEST TEMPERATURES.
19 - 5.4 STOP DISTANCE.
19 - 5.5 DROP ENERGY AND HEIGHT.
19 - 5.6 TESTING.
21 - SECTION 6. EXAMINATION OF TESTED TEST PIECES AND SUBSEQUENT ACTION
21 - 6.1 FEATURES OF EXAMINATION.
21 - 6.2 CRITERIA.
21 - 6.2.1 ‘Break’.
21 - 6.2.2 ‘No Break’.
21 - 6.2.3 ‘No Test’.
22 - 6.3 DETERMINATION OF NDTT.
23 - 6.4 ROUTINE PROVING TEST.
26 - SECTION 7. RECORDING AND REPORTING OF TESTS
26 - 7.1 RECORD OF RESULTS.
26 - 7.2 TEST REPORT.