ISO INTERNATIONAL STANDARD 6934-5 First edition 1991-12-15 Steel for the prestressing of concrete - Part 5: Hot-rolled steel bars with or without subsequent processing Acier pour armatures de précontrainte Partie 5: Barres en acier laminees a chaud avec ou sans transformation ulterieure Reference number ISO6934-5:1991(E) Copyright International Organization for Standardization Not for Resale ISO 6934-5:1991(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with iso, also take part in the work. isO collaborates closely with the International Electrotechnical Commission (lEC) on all matters of electrotechnical standardization. Draft Internationai Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Inter- national Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IsO 6g34-5 was prepared by Technical Committee iso/Tc 17, Steel, Sub-Committee SC 16, Steels for the reinforcement and prestressing of concrete. IsO 6934 consists of the following parts, under the general title Steel for the prestressing of concrete: Part 1: General requirements --- Part 2: Cold-drawn wire -- Part 3: Quenched and tempered wire - Part 4: Strand -- Part 5: Hot-rolled steel bars with or without subsequent processing C iSO 1991 All rights reserved. No part of this publication may be reproduced or utlized in any form or by any means, electronic or mechanical, inctuding photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56: CH-1211 Geneve 20 : Switzerland Printed in Switzeriand ii Copyright International Organization for Standardization ISO 6934-5:1991(E) INTERNATIONAL STANDARD Steel for the prestressing of concrete Part 5: Hot-rolled steei bars with or without subsequent processing Scope 4 Conditions of manufacture 1 This part of IsQ 6934 specifies requirements for 4.1 Steel round high tensile steel bars. The bars may be sup- plied either hot-rolled or in a hot-rolled and pro- according to the general condition, cordance with isO 6934-1. cessed requirements specified in IsO 6934-1. The surface The stee! shall be hot rolled into bars and, if re. may be plain or ribbed. quired, subsequently processed to give the specified The bars are delivered in straight lengths. mechanical properties. Longitudinal cracks which do not impair the speci- fied properties of the bar shall not be considered as 2 Normative references defects. The foilowing standards contain provisions which, Welds through reference in this text, constitute provisions 4.2 of this part of Iso 6934. At the time of publication, There shall be no weids or other joints in the bar the editions indicated were valid. All standards are subject to revision, and parties to agreements based supplied to the purchaser. on this part of Iso 6934 are encouraged to investi- gate the possibility of applying the most recent edi- 4.3 Threads tions of the standards indicated below. Members of IEc and IsO maintain registers of currently valid Where the bars have threaded ends, the threads International Standards. shalt be cold rolled to a profile agreed upon by the purchaser and manufacturer. Iso 6934-1:1991, Steel for the prestressing of con- crete -- Part 1: General requirements. Surface configuration 5 Iso 10065:1990, Steel bars for reinforcement of con- The surface configuration may be either plain or crete -- Bend and rebend tests. ribbed In the case of ribbed bars, the ribs shall be trans- 3 Definitio