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1035/4 International Standard (ISO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION+MEKAYHAPOAHAR OPTAHW3AUMA NO CTAHAAPTM3AUWWORGANISATION INTERNATIONALE DE NORMALISATION Hot-rolled steel bars Part 4 : Tolerances Barres enacierlaminees achaud-Partie4:Tolerances Second edition- 1982-08-01 UDC 629.14-422 :621.753.1 Ref.No.ISO1035/4-1982(E) ISO 1035/4-1982 Descriptors : iron- and steel products, hot rolled products, metal bars, dimensions, dimensional tolerances, metric system. Price based on 3 pages Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards institutes (Iso member bodies). The work of developing Inter- liatiulial Standards is carried out through Iso technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptancc as International Standards by the ISO Council. International Standard ISO1035/4was developed byTechnical CommitteeISO/TC17, Steel, and was circulated to the member bodies in April 1981. It has been approved by the member bodies of the following countries : Australia India Romania Austria Italy South Africa, Rep. of Japan Spain Canada Kenya Sweden China Korea, Dem. P. Rep. of Switzerland Czechoslovakia Korea, Rep. of Tanzania Egypt, Arab Rep. of Netherlands Turkey France New Zeaiand United Kingdom Germany, F.R. Norway USSR Hungary Poland The member bodies of the following countries expressed disapproval of the document on technical grounds : Belgium USA This second edition cancels and replaces the first edition (i.e. IS0 1035/4-1976). International Organizationfor Standardization, 1982 @ . Printed in Switzerland ISO1035/4-1982(E) INTERNATIONALSTANDARD Hot-rolled steel bars Part 4 : Tolerances Scopeand field ofapplication Tolerances of hot-rolled steel round, square,hexagonal and octagonal bars This International Standard specifies metric dimensional tolerances applicable to hot-rolled steel bars supplied in straight lengths in the following product forms : 4.1 Tolerances onsize round bars (for dimensions, see IS0 1035/1); a) 4.1.1 The tolerances on size shall be as specified in table 2 squarebars (fordimensions,seeIS01035/2); (see 4.5). b) c) hexagonal bars; 4.1.2 The permissible ovality for all diameters of round bars, measured as the difference between the maxirmum and (P octagonal bars; minimum diameters of the same cross-section, shall be 75 % of flat bars (for dimensions, see ISo 1035/3). the total tolerance specified on the diameter according to (0 table 2 (for example 1,2 mm for a nominal diameter of 40 mm The tolerances achievable by the manufacturer may vary with ordered according to tolerance class N) (see 4.5). the steel typee. The tolerances required by the purchaser may differ according to the application of the bars. Thus this Inter- 4.1.3 The permissible out-of-square for all sizes of square national Standard specifies several tolerance classes (see bars, measured as the difference of the distance between table 1). The appropriate tolerance class should be specified in parallel faces of the same cross-section, shall be 75 % of the the International Standard relevant to the steel grades and, total tolerance specified on the normal width of side in table 2 where appropriate, on the order. (see 4.5). 2 References 4.1.4 The permissible out-of-section for all sizes of hex- agonal and octagonal bars, measured as the maximum dif- ISo 1035/1,Hot-rolled steel bars Part 1 : Dimensions of ference in the distances across opposite flats of the same cross- round bars. section (three measurements in the case of hexayunal bars, fourmcasurements in the casc of octagonal bars) shallbe 75 % ISo1035/2,Hot-rolled s

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