ISO INTERNATIONAL STANDARD 642 Second edition 1999-09-01 Steel Hardenability test by end quenching (Jominy test) Acier - Essai de trempabilité par trempe en bout (essai Jominy) Tso Reference number ISO 642:1999(E) itted without license from IHS Not for Resale ISO 642:1999(E) Contents Page 1 Scope 2 Normative references 3 Principle 4 Symbols and designations .. 5 Form of test pieces and their preparation. 6Apparatus 7 Heating and quenching of test piece ... 8 Preparation for, and measurement of, hardness after quenching.. 9 Expression of results 10 Test report. Annex A (informative) Specification for the hardenability of a product. 10 Annex B (informative) Additional information to clause 10. ..13 Annex C (informative) Calculation of the hardenability. 15 Bibliography 16 @ISO1999 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic International OrganizationforStandardization Casepostale 56·CH-1211Geneve 20·Switzerland Internet [email protected] Printed in Switzerland Not for Resale @ISO ISO 642:1999(E) Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(lSo member bodies). The work of preparing International Standards is normally carried out through SO technical committees. Each member body interested in a subject for which a technical committee has been established has liaison with IsO, also take part in the work. iSO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote Methods of testing (other than mechanical tests and chemical analysis). This second edition cancels and replaces the first edition (isO 642:1979) which has been technically revised. Annexes A, B, and C of this International Standard are for information only. ii